BK Home Theater System 13790 1104 User Manual

B&K Components, Ltd.

REFERENCE 50 SERIES 2

User Manual

Seven Channel Surround

A/V Preamplifier Processor

13790 1104

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TABLE OF CONTENTS

ACCESSORIES AND LIMITED WARRANTY

TABLE OF CONTENTS

SAFETY PRECAUTIONS

FEATURES

AUDIO OVERVIEW

AUDIO AND SURROUND FORMATS

FRONT PANEL DESCRIPTION

BACK PANEL DESCRIPTION

QUICK START CONSIDERATIONS

HARDWARE CONNECTIONS

SOURCE CONNECTIONS

Source Connection Diagram

SACD or DVD-Audio Connection

VIDEO MONITOR CONNECTION

Component Video Monitor Connection

S-Video Monitor Connection

Composite Video Monitor Connection

SURROUND OUTPUT CONNECTIONS

7.1 Balanced Output Connection

6.1 / 5.1 Balanced Output Connection

RCA Surround Outputs / Subwoofer Connection

PASS THROUGH / RECORD LOOP CONNECTIONS

CONTROL OUTPUT CONNECTION

IR Emitter Connection

+12VDC Control Connection

ZONE B CONNECTIONS

Zone B Audio Amplification

Zone B Video Connection

REFERENCE 50 Series2 ZONE B CONNECTION DIAGRAM

KEYPAD CONNECTION

ZONE A & ZONE B IR CONNECTIONS

AM / FM ANTENNA CONNECTION

SETTING UP THE SYSTEM

THE MENU SYSTEM

MAIN MENU SELECTIONS

SYSTEM SETUP

SETUP SPEAKERS

1. Speaker Size

2. Setup Speaker Location

3. Setup Speaker Levels

4. Setup Crossover + LFE

5. Setup Room Equalization

6. Room Resonance (Notch Filters)

SETUP INPUTS

SETUP PRESETS

SETUP DISPLAYS

SETUP MUSIC MODES

MEMORY BACKUP/RESTORE

UNIT INFORMATION

ADVANCED MENU

Zone ‘1’ Home Theater

Power on Titles

Control Outputs

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TABLE OF CONTENTS

DSP Usage

Security Options

RS-232 Control Port

Plug and Play Timing Setup

Zone 2 ‘B’ Second Zone

FACTORY RESET

SR10.1 REMOTE CONTROL OPERATION

UNIT OPERATION

Master Power On / Off

On / Standby

Adjusting Volume

Center, Rear and Subwoofer Volume

Source Selection

Z1 Operation - Theater

Sleep Timer

Z2 Operation - Second Zone

Zone Operation Button

AM / FM Tuner Operation

Headphone Operation

FRONT PANEL DISPLAY OPERATION

Processor Status

AUDIO MODES & SPEAKER SELECTIONS

Audio Mode Usages

Speaker Selections

EQUALIZATION SETTINGS AND ADJUSTMENTS

PRESETS

Saving a Preset

Recalling a Preset

Favorite Presets

SR10.1 REMOTE EDITOR SOFTWARE

Learning IR Codes

BKcSuite SETUP SOFTWARE

Troubleshooting Guide For BKcSuite

TROUBLESHOOTING

BACK PANEL PICTURE

ON SCREEN MENU FLOW CHART

SPECIFICATIONS

Back

Product Information

Date of Purchase:

Preamplifier Model #: Reference 50 Series 2

Preamplifier Serial #:

Purchased From:

Address:

Phone #:

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SAFETY

CAUTION

R I S K O F E L E C T R I C S H O C K

D O N O T O P E N

SAFETY PRECAUTIONS

WARNING: to prevent fire or shock hazard, do not expose this unit to rain or moisture. Care should

be taken to prevent objects or liquid from entering the enclosure. Never handle the power cord with

wet hands.

• The lightning flash with arrowhead within a triangle is intended to alert the user of the presence of

uninsulated "dangerous voltage" within the product's enclosure that may constitute a risk of electric

shock to you.

• The exclamation point within a triangle is intended to alert the user of the presence of important

operating and maintenance (servicing) instructions in the literature accompanying the unit.

• Caution: To prevent the risk of electric shock, do not remove cover. No user-serviceable parts inside.

Refer servicing to qualified service personnel.

• If an outdoor antenna is installed, be sure it is grounded to provide some protection against voltage

surges and built up static charges. Keep outdoor antennas away from power lines.

• Unplug the preamplifier from the AC outlet when plugging in or unplugging cables, when left unused

for an extended period of time, when moving the preamplifier, or when you suspect lightning in your

area.

• Prevent damage to the power cord. Replace the power cord if it becomes damaged in any way.

Always grasp the plug on the power cord when plugging or unplugging the preamplifier from the AC

outlet.

• Your system may produce sound levels capable of causing permanent hearing loss. Do not operate

for extended periods of time at high volume levels.

• Protect the preamplifier from impact and place the preamplifier on a level surface.

• The preamplifier is equipped with raised feet to provide ventilation, reduce acoustic feedback, and

protect against scratching the surface the unit is resting on. B&K advises against removing the feet.

• Do not stack anything on top of the preamplifier (processor, source, etc.) Leave a minimum of 3"

clearance from the top of the preamplifier to the next shelf (or component).

• The preamplifier should be located away from sources sensitive to heat.

• Do not perform any internal modifications to the preamplifier.

• Always connect the preamplifier's power cord to a dedicated AC outlet for normal operation.

• If young children are present, adult supervision should be provided until the children are capable of

following all rules for safe operation.

• Mistaking CONTROL OUTPUT or IR INPUT connectors for audio/video inputs or outputs may

damage your preamplifier or other components.

•System impedance SHOULD NOT fall below the nominal impedance of the amplifier stage, i.e two

8Ω speakers in parallel = 4Ω (system impedance). Minimum stability refers to the periodic audio

passages that demand large amounts of current at which time the output impedance drops.

The preamplifier should be serviced by qualified personnel when:

The preamplifier is not functioning properly.

Objects have entered the chassis.

The preamplifier was exposed to rain or any other type of moisture.

The preamplifier was dropped, or the chassis is damaged.

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FEATURES

The Reference 50 Series2 preamplifier is a versatile Audio/Video control center. This preamplifier is designed

to sound sensational and be an attractive, easy-to-use addition to your Audio/Video system.

Video Transcoding - Allows composite and S-Video inputs to source the composite, S-Video and component

video outputs. Composite video will transcode to S-Video and S-Video will transcode to composite. Video

transcoding allows a single set of component video cables to be used with a video monitor.

Balanced Outputs - 7.1 balanced surround outputs are provided for superior transmission of audio material

to the power amplification stage.

Balanced Inputs - Two Balanced source inputs are provided for superior transmission of audio material for

up to two source components.

Room Equalization (Notch Filters) - Three sweepable notch filters and variable equalization are available in

the digital domain for use in achieving the best possible room response.



Motorola 371

Processor - The latest in Motorola technology provides outstanding processing power.

Two-zone operation - One main digital & analog A/V zone, (Theater Zone) plus a separate independent

analog A/V zone for use with a second listening/viewing area (2^ndzone).

CK1.2 Keypad Compatible - B&K’s CK1.2 Keypad easily integrates with the B&K processor/preamplifier for

control of the main theater zone or the second A/V Zone B.

Sleep Timer - 30 minutes to 4 hours in 30 minute increments.

5 Year Parts and Labor Warranty - For all B&K products sold through authorized dealers.

Gold Plated Connectors - Improved sound with minimum signal loss and degradation.

Internal Digitally Synthesized AM/FM Stereo tuner - Store up to 40 AM or FM stations in A/V presets.

Digital inputs/outputs - Six coaxial and five optical inputs. Two coaxial outputs (Theater zone & Second

zone) and one optical output for the Theater zone.

Analog inputs/outputs - Seven A/V inputs each with stereo audio, composite video and S-video inputs. One

assignable SACD or DVD-Audio input. One set of 7.1 line-level outputs. Three analog (record) loop outputs.

Control Outputs - Four 12 VDC @ 50 mA outputs for turning on (triggering) B&K amplifiers and controlling

external systems such as a projection screen. Up to three control outputs can be configured for IR outputs to

allow integration with a keypad or IR repeater control system.

IR inputs - Two IR inputs for keypads or external IR repeater control systems.

A/V presets - 40 preset memories allow instant recall of user settings and system configuration.

Customized Input and Preset Names - Assign custom names to presets, inputs, and the power on message.

RS-232 Control - Easy control and interface of your B&K product with other system controllers.

96/24 bit A/D and 192/24 bit capable D/A Conversion - Ultra high reproduction resolution of musical details.

96/24 Bit Processing - 96/24 bit digital data and analog source material use 96 kHz, 24 bit DSP processing

during all stereo listening modes.

Selectable Bass Management Crossover Frequency and Slope - Allows system versatility for bass adjust-

ments and management to assure superior performance from your speaker system. Shelving equalization

adjustments can be made to either end of the response frequency spectrum to further enhance the listening

room for optimal playback.

Upgradeable - Modular design allows for future A/D, D/A, DSP, and Digital Preamplifier upgrades. State of

the art today, state of the art tomorrow.

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AUDIO / VIDEO OVERVIEW

Definitions

Sources - A source is considered to be any device that can be connected to the audio/video receiver or

processor and transmit a signal that can be seen or heard. Typical sources include DVD players, satellite

boxes, CD players, etc. Your preamplifier can provide audio from its built-in AM/FM tuner. Your preamplifier is

designed to accommodate a wide range of audio and video signals.

Zone - A zone is usually a room or section of the house that has speakers and/or video installed in it. Your

preamplifier includes a full preamp/processor for Zone A , the main theater zone, plus an additional analog

audio and video preamp for Zone B - the second zone. Two zones allow for watching a Dolby Digital movie in

the main theater while simultaneously using the built-in AM/FM tuner in the second zone.

Amplifier - An amplifier takes the output of a pre-amplifier/processor and increases its levels necessary to

drive a speaker. In a receiver the amplifier is combined into the same box with the processor. B&K employs

high current amplifiers in their receivers. These amplifiers are also available as separate components.

Speakers - A surround sound system typically uses 5 speakers located left front, center front, right front, right

surround, and left surround plus a subwoofer located anywhere in the room. With the new developments in

surround technology from companies such as Dolby Laboratories and DTS, it is now possible to improve

spatial expressions with an additional channel of information for use with a 6^thor 7^thsurround back

speaker(s). Although best results are achieved using seven large speakers plus a subwoofer, this is not

always practical. Excellent results can be achieved using small and/or fewer speakers, as long as you go

through the setup procedures described later in the manual. Your processor includes the capability of repro-

ducing up to 7.1 channels of surround information.

A/V Preamplifier - An A/V preamplifier has the capability to select from a number of A/V sources, adjust

volume levels and route the audio to an amplifier and video to a video monitor. An A/V preamplifier requires

the use of an external power amplifier.

Surround Processor - A processor typically includes the capability to decode one or more surround formats,

and convert between digital and analog as required. Your A/V preamplifier includes a high quality Motorola^TM

processor capable of decoding the various audio surround formats.

Composite video vs. S-video vs. Component video - Composite video is the oldest standard for color

video. It combines the luminance (brightness or black-and-white) and chrominance (color) information onto a

single conductor. At the monitor, this composite video signal must be separated again for it’s display which

results in some degradation of the original video quality. S-video is a standard that uses separate conductors

for the luminance (Y) and chrominance (C) information resulting in better video quality. Component video is a

form of video which first became popular with the introduction of the DVD player. Most component video

signals are a variation of the red, green and blue signals that make up a television image. The simplest type,

RGB, consists of the three discrete R, G & B signals sent over three video cables. Another type consists of R-

Y, B-Y and Y (also known as YUV), sent over three video cables. Y is the luminance channel, R-Y is the red

component minus the luminance information, and B-Y is the blue component minus the luminance informa-

tion. Your preamplifier is capable of switching composite, S-video and component video signals, and

converting between signal types. Your A/V preamplifier is capable of transcoding composite video and S-

video to component YUV video signals.

Transcoding - Video transcoding is the process of converting one video format to another. Video

transcoding is a new technology brought about by the need to integrate these many different video formats.

Video transcoding does not change the resolution of the original video signal and allows different video

formats to be viewed on one video monitor. Video transcoding research is being driven by the need to

integrate video technologies pertaining to computer networks, cell phone, PDAs, television and satellite. Your

A/V preamplifier is capable of transcoding composite video and S-video to component YUV signals.

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AUDIO / VIDEO OVERVIEW

Analog vs. Digital Audio - This refers to the method used to place audio information on the source material

and how they are delivered to your preamplifier from the source. Analog signals exactly represent the sound

you will hear through a continuously varying voltage. Audio cassettes are analog recordings and are normally

delivered to your preamplifier over a pair of coaxial audio cables.

Digital signals closely approximate the original audio signals with a set of numbers referred to as a bitstream.

CDs and DVDs are sources of digital audio and are normally connected to your preamplifier through a single

coaxial or optical digital cable. There are several different bitstream formats available. The simplest format is

called Pulse Code Modulation (PCM). In PCM, the bitstream directly represents the original 2-channel audio.

In Dolby Digital and DTS (see "Audio and Surround Formats" below) bitstreams are modified using a process

called compression to squeeze more information into limited space. DTS squeezes 5.1 channels into the

space normally required for two uncompressed channels, while Dolby Digital squeezes 5.1 channels into

about ¼ the space required for two channels. Your preamplifier automatically detects the bitstream currently

being provided from the source and performs the required decompression and surround processing. If no

digital signal is present your preamplifier will automatically switch to analog processing. All sounds that you

hear from your speakers are analog. Digital signals are automatically converted to analog by your preampli-

fier before being output to the speakers.

If analog signals exactly represent the audio, while digital signals only approximate it, why would I

want to use digital?

All analog sources add some amount of noise and distortion to the audio signal. Additional noise can be

picked up through the cables from the source to your preamplifier. It is impossible for the preamplifier to tell

the difference between the desired signal and the added noise and distortion, so it reproduces both of them.

The result is increased background noise and decreased dynamic range and fidelity. Digital signals are virtu-

ally immune to noise and distortion. The preamplifier can, therefore, reproduce the signal with the greatest

possible fidelity. We recommend you use digital signals whenever possible. Also Dolby Digital and DTS (see

"Audio and Surround Formats" below) work only with digital signals.

AUDIO AND SURROUND FORMATS

Your source material will be played back on your B&K processor in one of the following possible formats

described below. Each format can be used for various listening conditions.

Monaural (Mono) - Mono is the oldest format available. It contains a single, full range audio channel. Modern

recordings are seldom made in this format, however older movies and music may only be available in this

format. You may get mono from any source - digital or analog. Your preamplifier can produce mono in one to

seven channels depending on speaker and audio setup. Since all modern sources are stereo, the mono infor-

mation is usually replicated on both the left and right channels.

Stereo - Stereo contains two discrete, full-range front left and right audio channels. This is the most common

format for music and is also used on many movies. You may get stereo from any source - digital or analog.

Sound will normally come from the seven speaker channels, but your preamplifier can produce stereo in two

to seven channels, depending on speaker and audio setup.

Dolby Digital 5.1 - Dolby Digital 5.1 is a method of transmitting and storing 5.1-channel soundtracks via

digital media such as DVDs, digital cable, digital broadcast TV (DTV), and satellite transmissions. Dolby

Digital 5.1 is transmitted over the optical digital or coax digital connections. Unlike the Dolby Surround

encode/decode Pro Logic process, which sacrifices channel separation to get surround onto any stereo

soundtrack, Dolby Digital 5.1 is a discrete system that keeps the multiple channels fully separated throughout

the encoding and decoding processes. In addition to having full-range front left, center, right, left surround,

and right surround channels, Dolby Digital 5.1 soundtracks carry a sixth (“.1”) channel recorded with low-

frequency effects. For more information on Dolby Laboratories, please visit www.dolby.com .

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AUDIO / VIDEO OVERVIEW

Dolby Digital Surround EX - Dolby® Digital Surround EX™ provides a third surround channel on Dolby

Digital movie soundtracks. The third surround channel can be decoded at the cinema's or home viewer's

option for playback over surround speakers located behind the seating area. The left and right surround

channels are reproduced by surround speakers to the sides. To maintain compatibility, the back surround

channel is matrix-encoded onto the left and right surround channels of an otherwise conventional 5.1 mix, so

no information is lost when the film is played in conventional 5.1.

A 5.1-channel soundtrack can be played on a 5.1-speaker system. But it is not always understood that it can

also be played on a 6.1- or a 7.1-speaker system. To do this, the two surround signals on the 5.1 soundtrack

are spread across the three or four surround speakers. This distribution can be accomplished by a Dolby

Digital EX decoder, or other proprietary methods provided in home theater equipment by various manufac-

turers.

Dolby Pro Logic II - Pro Logic II brings exciting features and advanced performance for decoding the many

thousands of existing Dolby Surround programs, making them sound more like a discrete Dolby Digital 5.1-

channel version than ever before. Pro Logic II is able to decode the thousands of existing Dolby Surround

movies and TV shows already on the shelf, compatibly, and with enhanced image stability. The improvements

in decoding techniques mean that the discreteness of the sound field elements are better preserved in the

decoding process than was possible with the standard Pro Logic technology. Pro Logic II offers a music mode

to expand stereo non-matrix recordings into a five-channel layout in a way that does not diminish the subtlety

and integrity of the original stereo recordings.

Dolby Pro Logic IIx - Dolby Pro Logic IIx is a new extension of Dolby Pro Logic II technology. This highly

sophisticated algorithm processes native stereo audio signals and 5.1-channel multi-channel content to

produce 6.1 or 7.1 output channels. Dolby Pro Logic IIx expands the choice in playback system configuration

(allowing 5.1, 6.1, or 7.1 playback channels) and, when incorporated into an A/V receiver or processor such

as B&K, it allows a convenient upgrade path from a traditional 5.1-channel sound system to 7.1 output

channels. The surround back channels are decoded into stereo

Center width - The Center Width control allows the user to modify the amount of steering that is

applied to Center signals. As steering is reduced, the Center signal originates increasingly from the Left and

Right speakers, and is concurrently reduced in the Center speaker. The purpose of the Center Width control

is to reduce the “hard Center channel” phenomenon that sometimes results from Center signal steering of

stereo encoded soundtracks.

Panorama - The function of the Panorama mode is to create a more enveloping front surround field. It

is equally useful when applied to Dolby Pro Logic IIx processing.

Movie or Music - Surround programs are primarily movie based. Even TV dramas are essentially

mixed like movies. When programs are mixed in surround, they are monitored through the surround decoder

that will be used for playback in the cinema or home. Movie mode is the reference decoder mode for any

such surround-encoded program.

Music, on the other hand, is commonly mixed for stereo playback, and no surround monitoring is done by the

mixer. When played back through a surround decoder, the results may not always be optimal. This is

because a movie-type decoder is expecting a signal that has been deliberately surround encoded. Music

mode brings the benefits of a highly natural and balanced multichannel surround sound field to content that

was not specifically encoded for surround playback.

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AUDIO / VIDEO OVERVIEW

DTS 5.1 (Digital Theater Systems) - DTS is a multi-channel digital audio compression format transmitted

over optical digital or coaxial digital connections. DTS is dedicated to delivering the “Ultimate Entertainment

Experience.” DTS has created a media-delivery format that makes audio tracks sound more dynamic, more

realistic and more closely matching the original than other digitally encoded soundtracks and consumer

media. Coupled with the multi-dimensional playback benefit of surround sound technology, DTS audio quality

dramatically improves and enhances content. DTS 5.1 is an ultra realistic home theater environment, it

delivers discrete channel precision plus the all-enveloping realism for which DTS is renown. For more infor-

mation on the various DTS formats, visit www.DTSonline.com .

DTS NEO:6 - An advanced matrix decoder. It will take any two-channel source and expand it into five or six

channels, depending on the user's speaker layout. Two-channel sources include VHS tapes, broadcast televi-

sion, stereo CDs and DVDs. DTS Neo:6 provides separate, optimized modes for stereo music materials and

matrix surround motion picture soundtracks. DTS Neo:6 also decodes a center-surround channel from

Extended Surround matrix soundtracks. Music and movie filters can be applied to the NEO:6 decoder. The

differences between these two filters apply primarily to the differences in the type of soundtrack being played

back.

DTS-ES 6.1 (Extended Surround) - The Extended Surround (ES) adds a discrete back center-surround

channel to the existing 5.1-channel array. DTS-ES Discrete 6.1 is the only home format that can deliver 6.1

discrete channels. DTS-ES is fully compatible with all types of multi-channel systems. All sounds will be

heard even when played back on a system with less than 6.1 speakers

DTS Neo:6 Movie - Movie steers decoded material toward the center channel while preserving the integrity

of the stereo mix. When listening to movies using the DTS Neo:6 movie decoder with stereo TV shows or

other surround-encoded programs, there is further enhancement to soundfield directionally, which is close to

the quality of discrete 6.1-channel sound. Conventional narrow band monaural surround channel is played as

stereo with a more realistic feel and movement.

DTS Neo:6 Music - Music steers the effects into the soundfield by utilizing the surround channels for a more

spacious, 3-dimensional feeling. When listening to music using the DTS Neo:6 music decoder, stereo music

recordings are able to provide a wide and deep soundfield. DTS Neo:6 music decoder allows you to tailor the

Center Image to your own preference. The Center Image control allows the sound of the center channel to be

placed between its own speaker and the left and right front speakers.

Bass Management - Dolby Digital and DTS-ES formats may contain up to 6 full range channels plus an LFE

(Low Frequency Effects) channel. Only a system with six full-range (large) speakers plus a subwoofer can

directly reproduce these formats. However, almost all commercially available center channel speakers and

bookshelf speakers are considered small and incapable of reproducing the lowest bass frequencies without

distortion or even damage to the speaker. Many people use small speakers in the rear of their system, while

others use small speakers for all channels. Some people may choose not to use a center channel or

surround speakers at all. Use of a subwoofer is mandatory when using small speakers to reproduce low

frequencies. In order to handle any possible combination of large, small, or missing speakers, a home theater

system must contain good bass management. Your B&K preamplifier contains a complete bass manage-

ment system. You can use as few as two large (full range) front left and right speakers or two small front left

and right speakers. Wherever a small speaker is used, the bass management system filters low frequency

information from going to that speaker ("high pass"). This bass information is re-routed to a speaker that can

handle it, usually a subwoofer. If no subwoofer is present, it can send the low frequency and LFE to large

front or surround speakers. The bass management crossover point can be adjusted by the user according to

the types of speakers being used.

Notch Filters (Parametric Equalization)- Notch filters are used to enhance the frequency response of a

given room. The full range frequency spectrum in an ideal scenario is completely flat. This means that there

is no variation in the decibel level between any of the frequencies as you sweep up or down the frequency

range. This type of response is almost impossible to achieve. Due to the physical geometry of any given

room, the sound waves will bounce off walls, doors or windows within the room. This reflection of sound

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AUDIO / VIDEO OVERVIEW

waves is a desirable effect to a point. Different locations in the room will have waves that collide with one

another. This collision can cause a superposition (addition or subtraction) of the audible wavelength. In

either case, these locations are referred to as nodes. If a positive node occurs in the primary listening

position, that frequency drowns out all other frequencies at that location, resulting in limited frequency

response for that location in the room. A node can occur at any frequency, however nodes are much more

prevalent in the lower frequency ranges (below 130Hz). In these lower frequencies, the wavelengths are

physically long enough that a superposition can have a more dramatic effect than frequencies at a higher

(shorter) wavelength. A notch filter provides a means by which the preamplifier can effectively ‘notch’ out

resonant frequencies to achieve a balanced frequency response for a given room. Once the frequency

response has been returned to its reference level, a fuller, more dynamic audio reproduction can be heard.

B&K supports three separate notch filters for the frequency range of 20 Hz to 300Hz.

DVD-Audio (also referred to as MLP) - DVD-Audio (also referred to as MLP^TM) - Meridian^RLossless

Packing. MLP^TMis a lossless compression system for high-quality linear PCM audio. For DVD-Audio MLP^TM

performs lossless compression of 1 to 6 channels of 14 to 24-bit material sampled at rates between 32kHz

and 192kHz. With lossless compression, the decompressed signal is bit-for-bit identical to the master, just

'packed' into a lower data rate which ultimately results in a reduced size to be stored on the disc. Currently,

DVD-Audio can only be delivered to your preamplifier via the analog 5.1 inputs. Sound will normally come

from your front left, front right, center, left surround, and right surround speakers, as well as your subwoofer,

but your processor can produce sound in one (mono) to seven channels. Dolby Pro Logic IIx is used to

matrix the surround back left and surround back right channels if a seven channel configuration is used.

SACD (Super Audio CD) - Is a new audio recording format aimed at providing higher fidelity audio reproduc-

tion than the compact disc. It was developed by Sony and Philips. The sound of SACD comes directly

from Direct Stream Digital (DSD) recording technology. SACD disks generally contain a 2-channel stereo mix.

Many also contain a 5.1 surround sound mix. DSD's simplified mechanism for recording and playback results

in a frequency response over 100kHz and a dynamic range over 120dB across the audible frequency range.

DSD increases the resolution of music by more closely following the original wave form of the music, which

results in music reproduction that is remarkably pure and faithful to the original. For additional information

concerning the technology behind SACD, visit Sony Electronics SACD.

Cinema Processing - Cinema is an exclusive set of standards and technologies that can be applied to any

B&K surround mode. In a typical movie theater the front left, right, and center speakers are located behind

the screen. The screen tends to block high frequency information. Therefore, movie soundtracks often have

boosted high frequency content to compensate for the effects of the screen. This boost can cause some

soundtracks to sound overly bright in a home theater where speakers are typically not behind a screen. B&K

cinema mode adjusts the front left, right, and center frequency response to compensate for the boost applied

for the movie theater.

High Current Amplifiers - A high-current amplifier is capable of delivering power into low impedance

speakers without going into protection and/or shutting down. Ideally, an amplifier's output power would double

every time the load presented at its output is halved. In a typical amplifier-speaker circuit, voltage and current

are delivered to a very complex load consisting of speaker drivers, resistors, inductors, and capacitors.

Voltage may be thought of as the potential to do work, and current as what actually flows to do the work.

Although basic power may be calculated by the simple multiplication of voltage and current, it is the delivery

of the power from the amplifier to the complex speaker load that accounts for why two amplifiers may have

the same power rating into identical impedances (speaker loads), but deliver a significantly different sound

quality. Some of these sound quality differences may include perceived loudness, depth, and clarity. High

quality speakers can have nominal impedances from 8 - 2 Ohms. During very loud and dynamic audio

passages, the speaker load may dip below 2 Ohms. These low impedance drops may cause a high voltage

power amplifier with limited power storage capacity to sound harsh and distorted. A high-current amplifier

operates with much less effort and typically does not have any problem with low impedance speakers. B&K

amplifiers and receivers are High Current Power amplifiers.

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FRONT PANEL DESCRIPTION

1. Headphone Jack - Headphones having a standard ¼” (6.3mm) stereo plug can be connected to the

headphone output.

2. Source Selector - Turning the selector clockwise or counterclockwise will cycle through the available

inputs. Available inputs are V1, V2, TV, DVD, CD, SAT, TAPE, FM and AM.

3. Front panel buttons -

Toggles the preamplifier in and out of standby mode, (ON or OFF).

Cycles through audio presets for instant preset recall.

Confirm Selection. Presets, menu options, unit status.

ON/STANDBY

PRESET

ENTER

Steps through audio options or menu selections when in the menu system.

Allows AM/FM tune - (down) or tune + (up).

DOWN & UP

MODE

Steps through audio modes

Enters into and out of the menu system.

4. Display - The preamplifier display contains a 16 character display. It will display current status of the

preamplifier and any changes being performed.

5. Main power switch - Removes all power to the preamplifier. Normal operation of the preamplifier requires

the power switch to remain on. Use the ON/STANDBY button for daily on and off of the preamplifier.

ON/STANDBY places the unit in standby mode that allows turning back on with the remote control. Only turn

the preamplifier off with the main power switch when not using the preamplifier for an extended period of

time.

6. Volume control - Turning the volume control clockwise increases the volume level, counterclockwise

decreases the volume level. The volume knob is also used to change other preamplifier settings.

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BACK PANEL DESCRIPTION

1. AC fuse holder - Holds the AC Line fuse. Replace only with same type and value - .5 amp Fast Blow.

Note: The voltage rating label is located on the AC fuse holder cover plate.

2. AC input receptacle - For attaching the supplied AC power cord to the preamplifier.

3. Four 10-12VDC @ 50mA Control Outputs - 1/8" (3.5mm) mono mini plug. Trigger outputs for controlling

external devices, such as amplifiers, projection screens, IR emitter, etc. Page 18.

4. ZA & ZB IR Data Input - Accepts IR from an external IR source. Internally summed.

5. Main RJ-45 jack - RS-232 input/output for computer interface and RS-232 controller applications. A B&K

CK1.2 keypad can also be connected to the RJ-45 jack. Page 36.

6. DVD-Audio 5.1 inputs - Connections for a DVD-Audio or other 5.1 analog source device. Page 13.

7. RCA Surround outputs - 7.1 Outputs for driving external power amplifiers or powered speakers. Page 17.

8. Zone B Output - Line outputs for supplying the second zone. Configurable fixed or variable. Page 19.

9. Balanced Surround (XLR) outputs - Connections for 7.1 speakers in the main theater zone. Page 15.

10. Balanced Source (XLR) Inputs - The CD and/or DVD inputs can accommodate a balanced input signal.

11. Antenna inputs - Connections for the AM and FM antennas. Page 21.

12. Component Video output - Component video pass through. Transcoded component video output. Page 14.

13. Component Video inputs - Three assignable component video inputs. Page 14.

14. A/V Source inputs - Seven sources can be connected using analog audio, composite video or S-Video.

15. A/V Source record outputs - Tape loop outputs will provide analog audio / video source signals for zone

A or Zone B recording. Page 18.

16. Optical SPDIF Digital - Optical digital connections for connecting optical digital audio signals from the

source to the preamplifier. 5 optical digital inputs, 1 digital output. Page 13.

17. Coax SPDIF Digital - Coax digital inputs are used to connect coax digital audio signals from the source

to the preamplifier. 6 coax digital inputs, 2 digital outputs. Page 13.

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QUICK START

QUICK START CONSIDERATIONS

Your B&K preamplifier is pre-programmed for ease of operation right out of the box. In general, there is

minimal setup required to start using your new A/V preamplifier. To quickly setup and begin operating your

preamplifier, follow these quick steps:

Start with all AC power cords unplugged from their designated AC outlet.

2 From each source device, connect the A/V cables to the appropriate A/V SOURCE INPUTS on the

preamplifier’s back panel.

3 Connect the audio cables from the preamplifier’s OUTPUTS to the power amplifier INPUTS.

4 Connect the appropriate video cables from the preamplifier’s video OUTPUTS to the video monitor’s

input(s).

5 Plug each AC power cord into its designated AC outlet.

6 Turn on the main power switch on the front of each unit. On the preamplifier, press the ON/STANDBY

button on the front panel, or the ON button of the remote. Turn on all A/V sources.

7 Select a source with the SR10.1 remote control or front panel source control of the preamplifier.

8 For use with a component video monitor, please see Setup Inputs page 30, Component Video

Assignment.

The rest of this manual will describe in detail the many aspects of your new preamplifier. Some additional

installation considerations should be noted as follows:

•

It is important that your electronic equipment has proper ventilation. Failure to ventilate your preampli-

fier could result in erratic operation and possible failure caused by overheating. A minimum of 3” clear-

ance should be maintained above the preamplifier. Do not place items directly on top of the preamplifier.

Do not place flammable items on, around or near the A/V equipment (Curtains, paper, etc.).

B&K supports various software programs that are able to aide in the setup process of the receiver/

preamplifier, SR10.1 remote and CK1.2 Keypad. This software is available online at B&K’s website at

www.bkcomp.com or by request from B&K’s customer service. The setup software is easy to use and

is intended to simplify the setup process of your new B&K products.

•

Configure a system diagram of all components that are to be connected into the system. The pre-

amplifier has seven sets of inputs. Even though the back panel is labeled for specific sources, in most

cases it is possible to connect any source to any input. For example, if you have a satellite receiver

you can connect it to the V2 input and it will work the same way as connecting it to the SAT input. Sel-

ect V2 instead of SAT. The source name that will appear on the preamplifier’s front panel and on the

remote or keypad can be relabeled to match the source equipment that is being used.

Determine the type of cable that is needed. Keep in mind that the quality of the cabling that is used

can make a difference in the overall audio and video quality. Try to keep interconnecting cable runs as

short as possible. When routing cables between equipment, be sure to keep AC cables separate from

audio cables. It is a good idea to bundle like cables together to keep interference (noise) to a

minimum.

Decide on what types of audio and video signals are going to be used in the system. Determine the

length of the cable for each component's connection and how it should be routed. It is a good idea to

label each cable with a name or number at both ends when allocating each cable. Have all the cables

you need before you begin the installation because it is inconvenient to run to the store when you are

excited to hear what the system will sound like.

•

Plan enough cable length and space to allow future access to the back panel.

For best tuner reception, make sure the antenna is several feet away from the preamplifier and any

other equipment that may produce high frequency interference such as personal computers, CD

players, halogen lamps, etc.

•

For best performance it is recommended that a dedicated AC power line or supply be used for the

best audio reproduction. If the equipment is installed in a rack, be sure to insulate the equipment from

the rack itself.

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HARDWARE CONNECTIONS

SOURCE CONNECTIONS

Your preamplifier supports several A/V input and output formats. In most cases only one audio and one video

connection is needed for each source device. Shown below are the available options:

Analog audio (Stereo): left and right.

Digital audio: either coaxial or optical.

DVD-Audio & Super Audio CD (SACD): Analog 5.1

Composite video: coaxial (Yellow RCA).

Super-Video: S-Video.

Component video: Red, Green & Blue.

Connect an audio / video source to the surround preamplifier. Use the diagrams that follow as a guide for

each of the seven source inputs. For analog audio connections, use the left and right (white and red) RCA

connections. For composite video, use the yellow RCA connections. For S-video use the S-video connec-

tions. For digital audio, use EITHER the coaxial digital connection (orange RCA) or the optical digital connec-

tion per each source. The order of audio signal precedence per each input is: Optical Digital > Coax Digital >

Analog left and right. For component video, use the red, green and blue RCA component connections. See

Video Monitor Connection page 14 for details on connecting a video monitor.

If the second zone of the surround preamplifier or the record loop outputs are going to be used, the analog

audio and composite video and/or S-video signals must be connected to the surround preamplifier. The

preamplifier will neither process nor convert digital audio or component video for use in the the second zone.

Source Connection Diagram

Coaxial Digital Connection

Optical Digital Connection

SACD or DVD-Audio Connection

DVD-Audio or SACD is a discrete 5.1 channel analog audio mode. If the source gear contains connections

for DVD-Audio or SACD, use the DVD-Audio input connections on the back panel of the surround preampli-

fier. The DVD-Audio input can be assigned to any source input except Tape (see Setup Inputs page 29). Be

sure to maintain the discrete channel connec-

tions. Each channel is labeled appropriately

according to the speaker location in the

room.

Many times, DVD-Audio players have

multiple configuration options. The preampli-

fier does not supply bass or delay manage-

ment for the DVD-Audio/SACD input. You

should adjust your player's bass and delay

management to match that of the preampli-

fier.

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HARDWARE CONNECTIONS

VIDEO MONITOR CONNECTION

There are many types of video monitors that can be used with your B&K system. Some popular video

monitors are televisions, plasma screens, LCD screens and projectors. The B&K A/V processor has video

and audio switching capability. The system source devices should be connected to the B&K processor for

both audio and video. One set of video cables may be connected from the B&K preamplifier's component

video OUT to the video monitor. The B&K video processor features video transcoding. Video transcoding

allows multiple video formats to be combined onto one. Transcoding will not change the resolution of the

image. Specifically composite video is transcoded to S-video (S) and component video. S-video is transcoded

to composite video and component video. Component video is not transcoded. The On Screen Setup Menu is

available in all three video formats. B&K recommends using the component video inputs for High Definition

source signals.

Component Video Monitor Connection

The B&K surround preamplifier provides three

sets of component video inputs and one

component video output. Since there are seven

A/V inputs and only three component inputs,

the preamplifier must be configured for which

component input to use with the selected A/V

source. For example, component Input 1 is

assigned to DVD, whenever DVD is selected,

the component output will come from compo-

nent Input 1. Composite to S or S to composite

transcoding will continue to function for the

DVD input. Component video is not transcoded

to composite or S. If no component assignment is made to a particular input, the component output will be

transcoded from the appropriate composite or S-video input. The preamplifier automatically detects the

presence of composite or S-Video. No user assignment is necessary.

IMPORTANT: By factory default, all component video inputs are unassigned. For use with component

video sources, HDTV receivers or progressive scan DVD players, each COMPONENT VIDEO must be

assigned for use with an A/V SOURCE INPUT (page 29) to operate correctly.

S-Video Monitor Connection

Each of the seven A/V inputs are provided with

an S-video input. There is an S-video output

for each zone of the surround preamplifier.

Zone A output will pass through S-Video or

transcode from composite video. Zone B S-

video output will provide output only from S-

video inputs - there is no transcoding for Zone

B. The Line Output section provides S-video

outputs for recording devices in Zone A or Zone

B. S-Video record outputs provide output only

from S-video inputs - there is no video transcoding for the record outputs.

Composite Video Monitor Connection

Each of the seven A/V inputs are provided with a composite RCA video input (yellow). There is a composite

RCA video output for each of the zones of the surround preamplifier. Zone A video output will pass composite

video through or transcode from S-video. Zone B composite video output will provide output only from

composite video inputs - there is no transcoding of video in Zone B. The Line Output section provides

composite outputs for recording devices used in Zone A or Zone B. The composite video record outputs

provide output only from composite video inputs - there is no video transcoding with the record outputs.

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HARDWARE CONNECTIONS

SURROUND OUTPUT CONNECTIONS

Your B&K preamplifier has two types of surround outputs: balanced (XLR) outputs and coaxial (RCA)

outputs. Both types of outputs connect from the preamplifier directly to the amplifier in the system. Either

type of connection can be used when connecting to the external amplifier. When connecting audio cables to

the amplifier, be sure to match the labeled output channel to the position of the speaker in the room.

7.1 balanced surround outputs are provided. Each balanced connector will click when locked in place. To

release, push in on the silver tab and unplug the balanced connector. Be sure to pull on the plug and not the

wire. Eight coaxial (RCA) surround outputs are provided. The RCA output section on the back panel is

labeled Surround Outputs. See page 17 for a connection diagram using the coaxial connections.

For best acoustic results, be sure to set up the speakers using the speaker setup menu. To Setup System

Speakers see page 25 .

7.1 Balanced Output Connections

To connect a 7.1 or 7.0 audio system using balanced cabling, see the connection diagram below. All seven

surround outputs should be connected to the amplifier. The point one (.1) indicates whether or not the system

will use a subwoofer. If a subwoofer is used, the Reference 50 Series2 has two subwoofer outputs, one

balanced (XLR) Subwoofer out and one coaxial (RCA) Subwoofer out, either can be used for connecting a

subwoofer into the audio system. If a subwoofer is going to be used, connect the subwoofer cable from the

subwoofer output to the subwoofer. The diagram below illustrates using a balanced cable to connect a

powered subwoofer.

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HARDWARE CONNECTIONS

6.1 / 5.1 Balanced Output Connections

For use in a 6.1 or 6.0 audio setup, refer to the diagram below. We recommend the 6th speaker be

connected to the surround back left channel of the surround preamplifier. However, either the back left or

back right output will operate correctly when the system is configured for use with one back speaker. The

point one (.1) indicates whether or not the system will use a subwoofer. If a subwoofer is used, The

Reference 50 Series2 has two subwoofer outputs, one balanced (XLR) Subwoofer out and one coaxial (RCA)

Subwoofer out, either output may be used. Connect the subwoofer cable from the subwoofer output to the

subwoofer. The diagram below illustrates a connection using a balanced cable to connect to the subwoofer.

A 5.1 or 5.0 speaker setup will not use the 6th or 7th surround back channel(s). To use the Reference 50

Series2 in a 5.1 or 5.0 audio setup, only connect five channels using the surround speaker channels. Do not

use the surround back left or surround back right for a 5.1 setup. The speaker setup menu will then used to

configure the internal software for proper audio selection and operation (see page 25).

Reference 50 Series 2

AC LINE

OUTPUTS

A/V SOURCE OUTPUTS

ZB/V2 V1

TAPE

A/V SOURCE INPUTS

CD DVD TV

COMPONENT VIDEO

IN IN

COAX S/PDIF DIGITAL

OPTICAL S/PDIF DIGITAL

ZA OUT

ZONE

TAPE

SAT

OUTPUT

OUT

SAT

DVD

SUB

CENTER

SUB

CENTER

Audio/Video Systems Hand-Made in the U.S.A.

ET R!

ZB OUT

SAT

DVD

CONTROL OUT

12VDC

50 mA

IR INPUT

ZONE

RS-232

PORT

IEEE

1394

EXPANSION

IR INPUT

ZONE

SURRND FRONT SURRND FRONT

BACK ZONE

ANTENNA

www.bkcomp.com

RIGHT

SURROUND BACK SURROUND

RIGHT RIGHT

FRONT

RIGHT

FRONT

LEFT

SURROUND SURROUND BACK

SUBWOOFER

CENTER

LEFT

RIGHT

LEFT

DVD

CAUTION

RISK OF ELECTRIC

SHOCK DO NOT OPEN

FUSE

(

)

(

)

Reference 200.7 Series 2

SERIAL

BALANCED SURROUND OUTPUTS

BALANCED LINE INPUTS

(

)

(

)

CONTROL I/O

CONTROL IN ALLOWS AMPLIFIER

OPERATION WHEN

IS APPLIED WITH

5-24V SIGNAL

3.5mm MINI JACK

CHANNEL

INPUT

CHANNEL

INPUT

CHANNEL

INPUT

CHANNEL

INPUT

CHANNEL

INPUT

CHANNEL

INPUT

CHANNEL

INPUT

CTRL

(

)

(

)

(

)

(

)

CTRL

OUT

(

)

(

)

(

)

(

)

FUSE

S_E

_FU

Balanced cables

CHANNEL

OUTPUT

CHANNEL

OUTPUT

CHANNEL

OUTPUT

CHANNEL

OUTPUT

CHANNEL

OUTPUT

CHANNEL

OUTPUT

CHANNEL

OUTPUT

POSITIVE

NEGATIVE

POSITIVE

NEGATIVE

POSITIVE

NEGATIVE

POSITIVE

NEGATIVE

POSITIVE

NEGATIVE

POSITIVE

NEGATIVE

POSITIVE

NEGATIVE

AC LINE

High Performance

Audio/Video Systems

Hand-Made in the U.S.A.

CAUTION

SERIAL

www.bkcomp.com

D O

SIMPLY BETTER!

POS (+)

NEG (-)

POS (+)

NEG (-)

POS (+)

NEG (-)

Center

Front Left

Front Right

Listening Area

POS (+)

NEG (-)

POS (+)

NEG (-)

POS (+)

NEG (-)

SUBWOOFER I/O

OUT IN

Surround Right

Line

OFF

Surround Left

OUT

Connect this channel

if 6.1 or 6.0 is desired

Subwoofer

Surround

Back L

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HARDWARE CONNECTIONS

RCA Surround Output / Subwoofer Connection

The Reference 50 Series2 supplies 7.1 RCA coaxial surround outputs. These surround outputs can be used

to connect an external amplifier or the subwoofer to the preamplifier. To connect seven audio channels,

connect seven coaxial audio cables between the surround outputs and the amplifier inputs. Be sure to match

the appropriate preamp output to the speakers location in the room, i.e. connect the center channel output to

the center speaker amplifier channel. If a 5 channel audio system is desired, do not connect the surround

back audio channels. If a 6 channel audio system is desired, connect the 6^thchannel to the surround back

left channel. See page 25 for speakers setup.

If a subwoofer is used, The Reference 50 Series2 has two subwoofer outputs, one balanced (XLR)

Subwoofer out and one coaxial (RCA) Subwoofer out, either output can be used. Connect the subwoofer

cable from the subwoofer output to the subwoofer. The diagram below illustrates seven channels plus the

subwoofer connected using the coaxial RCA outputs.

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HARDWARE CONNECTIONS

PASS THROUGH / RECORD LOOP CONNECTIONS

The B&K preamplifier has a few options for record/pass through outputs. There is a Zone A optical digital

output, a Zone A coaxial digital output and a Zone B coaxial digital output. The B&K preamplifier provides

three analog audio, composite & S-video outputs. These outputs are labeled TAPE, V1 and Z2/V2 in the Line

Outputs section of the back panel.

Optical Digital Output - The optical digital output will output the digital signal of the source selected in the

main theater zone (Zone A). Coaxial digital inputs are converted to optical. You need only connect one or the

other. Analog inputs are not converted to digital output. If you wish to record both analog and digital sources

you must connect both analog and digital inputs to your recorder.

Zone A and Zone B Coaxial Digital Outputs - The Zone A and Zone B coaxial digital outputs will output the

digital signal of the source selected in the corresponding zone. Optical digital inputs are converted to coaxial.

You need only connect one or the other. Analog inputs are not converted to coaxial digital output. If you wish

to record both analog and digital sources you must connect both analog and digital to your recorder.

Tape Out - The analog Tape output is a pass through / record loop output for the source that is selected in

the main theater zone. To prevent possible speaker damaging feedback, tape out will not output the TAPE

source input. Digital audio is not converted to analog audio on the Tape output. You must connect analog

audio to the A/V inputs if you want to make analog recordings from the input device. Only LtRt mode will

downmix a digital bitstream into left and right analog. Video is not transcoded on the Tape output. If you have

a composite recorder you must connect composite from each A/V source you wish to record. If you have a S-

video recorder you must connect S-video from each A/V source you wish to record.

V1 Out - The V1 output can be configured as an output for a second recording device in Zone A or as a Zone

A line output to connect a second video monitor and/or audio amplifier. As a record output, V1 will output the

analog audio and video from the selected input in Zone A except when V1 is selected. This prevents

feedback through the recording device which could damage your speakers. As a line output V1 will output the

analog audio and video from whatever input is selected in Zone A. LtRt mode will downmix a digital bitstream

to left and right. Record/Line settings also apply to the Zone A optical and coaxial digital outputs. Similar to

the Tape output, digital audio is not converted to analog on the V1 output. Video is also not transcoded on the

V1 output. To configure the V1 output see page 33.

ZB / V2 Out - The V2 output can be configured as an output for a second recording device in Zone B or as a

Zone B line output to connect a second video monitor and/or audio amplifier. As a record output, V2 will

output the analog audio and video from the selected input in Zone B except when V2 is selected. This

prevents feedback through the recording device which could damage your speakers. As a line output V2 will

output the analog audio and video from whatever input is selected in Zone B. Record/Line settings also apply

to the Zone B optical and coaxial digital outputs. As with the Tape output, digital audio is not converted to

analog on the V2 output. Nor is video transcoded on the V2 output. To configure the V2 output, see page 38.

CONTROL OUTPUT CONNECTION

The B&K surround preamplifier is supplied with four control outputs. These control outputs can be used for a

variety of applications that require a 12 volt control or an IR output (pass through). The control outputs use a

1/8” (3.5mm) mono mini plug. Each output is 10-12VDC @ 50 mA. Control output 1 is strictly a +12VDC

control trigger. Control outputs 2-4 can be set up as either +12VDC controls or as an IR pass through. To

configure the control outputs, see the control setup section on page 34.

COAX S/PDIF DIGITAL

OPTICAL S/PDIF DIGITAL

OUTPUTS

A/V SOURCE OUTPUTS

A/V SOURCE INPUTS

COMPONENT VIDEO

ZONE

ZB/V2

TAPE

SAT

OUTPUT

ZA OUT

OUT

SAT

DVD

IR Emitter Connection

SUB

CENTER

SUB

CENTER

Audio/Video Systems Hand-Made in the U.S.A.

ZB OUT

SAT

DVD

CONTROL OUT

12VDC

50 mA

IR INPUT

ZONE

RS-232

PORT

To connect an IR emitter to the control output, one end should be

terminated into a 3.5mm mono mini plug, tip (+), sleeve (-). The IR

output will pass through IR signals received by the surround pream-

plifier. Only industry standard 38kHz IR may be used with the IR

outputs. Additional resistance may be required in series with the IR

emitter, check the current rating of the emitter you are using.

IEEE

1394

IR INPUT

ZONE

SURRND FRONT SURRND FRONT

BACK ZONE

ANTENNA

PLAY 8:33

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HARDWARE CONNECTIONS

+12VDC Control Connection

If the +12VDC trigger is going to be used, it

should be connected as shown right. An

external amplifier is being used for this

example, however the external device could

be any device that employs a control trigger

circuit. The plug must be wired as tip (+) and

the sleeve (-). The diagram at right shows a

B&K amplifier controlled with the +12Volt

control.

ZONE B CONNECTIONS

Your B&K preamplifier is capable of controlling a second independent analog audio and composite video or

S-video zone. This second zone could encompass a small room or large area depending on how much

amplification is supplied. The second zone is strictly analog audio, composite video and/or S-Video. There is

no transcoding for Zone B. The composite video and analog (stereo) audio must be connected to the pream-

plifier in order to be seen and heard in the second zone. Control for the second zone can be accomplished

by using a remote control or by connecting a CK1.2 Keypad. See page 21 for keypad connection description.

The audio and video output signals are connected from the Zone B outputs on the back panel of the pream-

plifier to a Zone B video monitor and a Zone B amplifier.

Zone B Audio Amplification

To connect an amplifier for second zone (Zone B) audio, connect RCA type audio cables between the Zone B

left and right output to the second zone amplifier. The Zone B audio output can be configured fixed or

variable. Connect the second zone video cable to the Zone B composite or S-video output. The second zone

has the ability to link power and/or source input to the main theater zone. From the factory, the second zone

is configured as a separate, independent audio and video zone. To configure the Zone 2 audio settings, see

page 38. The diagram on page 20 illustrates how a Zone B amplifier should be connected to the Reference

50 Series2.

Zone B Video Connection

To connect a video monitor for second zone (Zone B) video, connect RCA type or S-video type video cable

between the Zone B composite or S-Video output to the second zone video monitor. The Zone B video

output will not display the On Screen Menu. Zone B video is not transcoded. The diagram on page 20 illus-

trates how a Zone B Video monitor should be connected to the Reference 50 Series2.

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HARDWARE CONNECTIONS

REFERENCE 50 Series2 ZONE B CONNECTION DIAGRAM

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HARDWARE CONNECTIONS

KEYPAD CONNECTION DESCRIPTION

To connect a CK1.2 Keypad to the Reference 50 Series2, run a straight through Category 5 (CAT5) cable

from the keypad location to the RS-232 jack on the preamplifier back panel. Terminate both ends of the

CAT5 cable into RJ-45 using the T568B standard. Plug one RJ-

45 end into the main RJ-45 jack on the back panel of the pream-

plifier. Plug the other end into the RJ-45 jack labeled Master IN

on the back of the keypad. The main RJ-45 jack on the pream-

plifier will supply connections for +12VDC power @ 200mA, IR

data and +12V control @ 50mA. See page 36 for the main RJ-

45 pin out description.

A keypad can be configured to control connected sources with

IR by setting the control outputs to REMOTE. See the control

output configuration page 34. A CK1.2 keypad can be

programmed to control either the main theater zone, Zone B or

both. Theater Zone status can be displayed on the keypad by

pressing the backlight button.

ZONE A & ZONE B IR INPUTS

Two IR inputs are located on the back panel of the preamplifier. They are labeled IR IN, Zone A & Zone B.

The IR inputs use a 3.5mm mono mini jack. Internally, both the Zone A and Zone B IR signals are summed

before they are sent to the processor. Your processor can be controlled by a directly connected IR repeater

system in combination with or in place of the supplied remote control. Connect the IR input cable to the

processor using a mono 3.5 mm plug. The plug must be wired as tip (+) and the sleeve (-). The inputs are

standard 38kHz modulated IR type with a voltage range of +5 to +12 VDC.

AM / FM ANTENNA CONNECTION

The B&K preamplifier contains one internal AM/FM tuner. To connect the AM antenna, use the AM antenna

connection block and the AM antenna supplied. The AM is a push type. Strip ¼ inch of insulation off your AM

antenna wires and insert one wire end into each hole while holding the tabs down. Release the tabs to lock in

the AM antenna wires. The FM jack is a standard screw on F-type connector. To connect the FM antenna

use the dipole antenna supplied.

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MENU SYSTEM SETUP

SETTING UP THE SYSTEM

The setup of the preamplifier will require navigation through the menu system. The system menu will display

on the front panel as well as an On-Screen Menu format. The OSD menu is available on all three video

format types. B&K recommends that a video monitor, connected to a Zone A video output, be used in

conjunction with the SR10.1 remote to setup the system using the OSD menu. It is possible to set up your

preamplifier directly from the front panel. The descriptions below are general instructions for using and

navigating the menu system. A complete navigational menu system flow chart is located on page 58.

B&K supports setup software (BKcSuite) that can be used to assist in the setup of the preamplifier.

BKcSuite setup software is available on our website at www.bkcomp.com. BKcSuite provides a fast and easy

way to configure the system parameters of the preamplifier using a personal computer or laptop

equipped with a serial port. You can save the configuration files for later use or as a backup.

Directions for installing the BKcSuite are available on page 54 or on our website. BKcSuite is compat-

ible with any B&K audio processor and can be used in conjunction with the SR10.1 Remote or CK1.2

Keypad programming software.

THE MENU SYSTEM

MENU Button - Pressing the MENU button either on the remote or on the front panel will activate the menu

system. Once you are in the menu system, the MENU button will step back to the next higher-level menu or,

if you are already at the highest level, it will exit from the menu system.

EXIT (remote only) - From the remote control you may instantly exit the menu system by pressing the EXIT

button. From the front panel press Menu repeatedly until you leave the menu system

UP/DOWN ARROWS - Once you are in the menu system, use the UP/DOWN ARROWS to move to the

desired menu selection. With the supplied SR10.1 remote, rocking the thumb pad forward and backwards act

as the up and down arrows.The current active menu line is highlighted in a contrasting color in the On-screen

display and also shown on the front panel display.

SELECT / ENTER - Some menu selections select another menu level to be activated. Use the UP/DOWN

ARROWS to move to the desired menu line. Pressing SEL or ENTER will activate the next menu. With the

supplied SR10.1 remote, pressing on the center of the thumb pad also acts as the ENTER key.

NUMERIC KEY DIRECT ENTRY (remote only) - From the remote control you may also go directly to a

menu line by typing the corresponding line number. If there is another menu level below that line it will be

activated immediately (no ENTER required).

LEFT / RIGHT ARROWS (remote) or Volume Knob (front panel) - To change menu parameters, press the

LEFT or RIGHT arrows to change the setting. There are no LEFT or RIGHT arrows on the front panel. The

volume knob acts as the LEFT or RIGHT arrows. With the supplied SR10.1 remote, rocking the thumb pad

left and right act as the left and right arrows.

TEXT EDITING - Some menu selections will allow you to edit text. Use the UP/DOWN ARROWS to change

the current (blinking) character. Use the LEFT/RIGHT ARROWS (or VOLUME KNOB) to move to another

character position. Additionally, while in the edit text mode, a successive press of a numeric key allows direct

recall of the alphanumeric character map. It will allow a step through selecting between numbers, letters

and/or symbols. The selection options for each of the numeric keys are as follows:

0 = [-, +, /, ?, space, 0]

1 = [A, B, C, a, b, c, 1]

2 = [D, E, F, d, e, f, 2]

3 = [G, H, I, g, h, i, 3]

4 = [J, K, L, j, k, l, 4]

5 = [M, N, O, m, n, o, 5]

6 = [P, Q, R, p, q, r, 6]

7 = [S, T, U, s, t, u, 7]

8 = [V, W, X, v, w, x, 8]

9 = [Y, Z, y, z, 9]

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MENU SYSTEM SETUP

MAIN MENU SELECTIONS

The main menu descriptions are accompanied by the On Screen Menu layout below. In some cases, the

front panel will display a slightly abbreviated version of what the On Screen Menu shows due to character

space limitations. The On Screen Menu is accessible from the component video output, the Zone A S-video

output and the Zone A composite video output. B&K recommends using the On Screen Menu for adjusting

unit parameters. The On Screen Menu is not available in Zone B.

On Screen Menu Format

MAIN MENU

1 System Setup

2 Unit Information

3 ZO1perOapteiroantio-nT-heaTtherater

4 Z2 Operation - 2nd Zone

↑↓ next item ENT select

MENU exit menu system

Front Panel Menu Format

1 System Setup - System setup should be used when initially setting up the preamplifier, or if system

parameters need to be adjusted. Page 24.

2 Unit Information - Contains information about the unit make, model, serial number, software version,

BKC-DIP version, phase locked loop chip version. This information may be needed when contacting

customer service. Page 32.

3 Z1 Operation-Theater - Allows viewing and changing the entire state of Zone A. See Unit Operation

page 41.

4 Z2 Operation-2nd Zone - Allows viewing and changing the entire state of Zone B. See Unit Operation

page 41.

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MENU SYSTEM SETUP

SYSTEM SETUP

1 Speakers

2 Inputs

3 Presets

4 Displays

5 Music Modes

6 Memory Backup/Restore

7 Advanced

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MENU main menu

1. Setup Speakers

This menu configures the preamplifier for the number of speakers, speaker size, and location of the speakers

in the room. It also contains room equalization options that can optimize the sound for a particular room. The

overall sound quality of your system will depend upon how the parameters of this menu are setup. It is very

important that the speaker setup is performed when the preamplifier is initially installed or if any speakers are

moved or changed. Page 25.

2. Setup Inputs

This menu configures the preamplifier for the audio/video source devices that are connected to the system.

This setup should be performed when the system is initially installed and whenever source components are

added or removed. Setup inputs also describes the various audio modes and how each input is configured

when it is selected. See page 29.

3. Setup Presets

This menu configures the preamplifier for how the presets will operate and be recalled. Presets allow virtual

“snapshots” of the current settings to be saved. The presets can then be recalled at a later time.

See page 30.

4. Setup Displays

This configures the preamplifier for preferences relating to the front panel and on-screen displays. To setup

the display menu, see Page 31.

5. Music Modes

This menu configures the preamplifier for user preferred settings pertaining to the surround decoders. The

preamplifier includes Dolby Pro Logic IIx and DTS NEO:6 processing which expands 2 channel stereo infor-

mation into 6 or7 channels. To setup music modes see Page 31.

6. Memory Backup/Restore

This menu allows a backup to be made of all system settings for restore at a later date. Once the setup of

your preamplifier is complete it is recommended that you perform a memory backup. In case that an

undesired change is made, the memory restore will allow you to restore your original settings. See Page 31.

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MENU SYSTEM SETUP

SETUP SPEAKERS

1. Speaker Size

SETUP SPEAKERS

1 Speaker Size

The speaker setup menu defines how many speakers are installed in the

system, the relative size of the speakers, and their location in the room.

This is the most important setup procedure that will be performed. The

preamplifier comes from the factory setup for 7 small speakers and a

subwoofer. If this does not match your speakers then audio information

may be lost.

2 Speaker Location

3 Speaker Levels

4 Crossover + LFE

5 Room Equalization

6 Room Resonance

↑↓ next item ENT select

MENU main menu

Speaker size refers to the frequency range the speaker(s) can handle.

Audio material, particularly Dolby Digital and DTS movies, often contain

large amounts of bass. If this bass information is sent to small speakers

that are incapable of reproducing bass, then this information will be lost or distorted. TOO MUCH BASS MAY

DAMAGE MANY SMALL SPEAKERS. By configuring the preamplifier for the correct type of speakers, it will

appropriately route the bass information to the speakers that can reproduce it correctly. Typically, all

bookshelf or satellite speakers are considered small. Smaller floor standing speakers with single woofers 8"

or less should also be considered small. Floor standing speakers with 10" or larger woofers, or multiple

smaller woofers may be considered large. These are general guidelines only - if you are unsure consult your

speaker manufacturer or dealer. If there are all small speakers we strongly recommend the use of a

subwoofer. If the speakers are large then the system may not require a subwoofer, but better results may be

obtained with the use of a subwoofer, especially with Dolby Digital and DTS movies. Even if the speakers are

capable of reproducing deep bass, better overall bass response may be obtained by setting these speakers

to small. This allows bass to be reproduced from a single point (the subwoofer) and avoids the possibility of

phase cancellation which can occur when bass is reproduced from multiple speakers.

Front Speakers - There must be at lease 2 front speakers in order to use your preamplifier. Set them

to small or large based on the guidelines above.

SETUP SPEAKER SIZE

Center Speaker - It is not necessary to have a center speaker.

1 Front

2 Center

3 Surround

4 Surround Back 2 Small

5 Subwoofer Yes

Large

Small

Set it to small or large based on the guidelines above. Or, if there is no

center speaker, set it to none. The center information will be reproduced

in the front left and right speakers. No audio information is lost however

the sense of voices coming from the screen may be lost.

Surround Speakers - It is not necessary to have surround

speakers. Set them to small or large based on the guidelines above. Or,

if there are no surround speakers, set them to none. The surround infor-

mation will be reproduced in the front left and right speakers. No informa-

tion is lost but the sense of spaciousness provided by discrete 5.1

↑↓ next item adjust ←→

MENU setup speakers

channel soundtracks or 2 channel tracks enhanced by Dolby Pro Logic IIx or DTS NEO:6 may be lost.

Back Speakers - It is not necessary to have back speakers, however back speakers cannot be used

unless the surrounds are used. If surround speakers are set to none, no options will appear for back

speakers. There is the option to use 1 or 2 back speakers in either large or small varieties. If set to none, the

back information will be reproduced in the surround speakers and although no information is lost, the sense

of sounds coming from directly behind you may be lost.

Subwoofer - There are three choices for subwoofer. If set to none, all bass information, including LFE

(.1 channel) will be routed to any large speakers in the setup above. If there are no large speakers and no

sub, the bass information will be lost. The most common setting for subwoofer is Yes. The LFE channel and

bass information from any small speakers is reproduced in the sub. Bass information from large speakers is

reproduced only in the large speakers - it is not sent to the sub. B&K provides a third setting called Ultra.

Ultra is identical to Yes as far as LFE and small speakers, but bass from large speakers is reproduced in the

large speakers AND the sub therefore allowing bass to be reproduced from multiple locations in the room.

The ultra setting also allows bass to be sent to the subwoofer when listening in Direct mode.

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MENU SYSTEM SETUP

2. Setup Speaker Location

SPEAKER LOCATION

feet

Ideally the speakers should be positioned at an equal distance from the

listening position. However, physical limitations usually require placing

the speakers in other than optimum locations. The surround processor

contains a means to electronically move each speaker’s location. This

allows for superior reproduction of the directional cues available during

movie or music playback. Measure the distance in feet from your

listening position to each speaker. Enter this information into the menu.

The units can be changed to meters if preferred.

Left Center Right

10.0 10.0 10.0

Front

Surround 10.0

10.0

Back

Subwoofer

10.0

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MENU setup speakers

3. Setup Speaker Levels

SETUP SPEAKER LEVELS dB

Left Center Right

Speaker level calibration will generate pink noise to allow the equaliza-

tion of the volume levels of each speaker to make up for differences in

speaker characteristics and distances from the listener to the speakers.

Best results will be achieved using a Sound Pressure Level (SPL)

meter. Set it to C Weighting and Slow Response. Place the meter at

your listening position and adjust each speaker for an equal response.

(SPL of 75dB recommended).

Front

Surround 0.0

0.0 0.0

0.0

Back

Subwoofer

0.0

If you don't have an SPL meter, adjust the levels by ear. Step through

each speaker and adjust for approximately equal volume levels.

↑↓ next item adjust ←→

MENU setup speakers

4. Setup Crossover + LFE

SETUP CROSSOVER + LFE

High / Low pass crossover frequency - This sets the frequency at

which bass tones are filtered from the small speaker channels and sent

to the subwoofer. Set this according to the capabilities of the speakers.

For very small bookshelf speakers the frequency may need to be raised 4 LFE Level

to 100 or even 150 Hz. For speakers with larger woofers, the crossover

frequency can then be lowered so only the lowest tones are sent to the

subwoofer.

1 Crossover Freq

2 High Pass Slope

3 Low Pass Slope

80.0 Hz

12.0 dB

24.0 dB

0.0 dB

↑↓ next item adjust ←→

High / Low pass slope - A crossover doesn't simply send all content

above 81 Hz to the main speakers and all content below 79 Hz to the

MENU setup speakers

sub. Instead there is a gradual transition. The crossover point is the frequency at which the amount of infor-

mation in the subwoofer and main speaker(s) is equal. The crossover slope determines how gradual or

abrupt this transition occurs (6, 12 or 24dB). More gradual slopes generally result in a smoother transition

from main speakers to subwoofer. However, gradual transitions can cause distortion in small main speakers

because too much bass is sent to them. Gradual transitions with higher crossover settings can also cause the

perceived location of a sound to move from the correct main speaker location. Normally, you will want to use

identical slopes for high pass and low pass. However, many small speakers include a 12dB high pass slope

in the speaker itself. If this is the case, you will want to choose a 24dB low pass slope and 12dB high pass

slope so that the end result is 24dB in both the subwoofer and main speakers. The crossover frequency

should be set to match that built into the speakers (typically 80Hz).

The low pass slope can be set to EXTERNAL, 6, 12, or 24dB. The EXTERNAL setting will send full range to

the subwoofer output allowing an external crossover to handle the low pass slope. If the subwoofer has an

off or bypass selection for it's internal crossover, we recommend setting it to off and using the preamplifier's

crossover. If the subwoofer's crossover cannot be bypassed, but can be set to a high frequency, then the

preamplifier’s crossover can be used. If the subwoofer’s crossover can't be defeated or raised to a high

frequency we recommend that you set the preamplifier’s low pass slope to external and adjust the preampli-

fier's crossover frequency to match that of the subwoofer.

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MENU SYSTEM SETUP

LFE (0.1) channel level - Usually this will be set to 0.0 dB (default). However, if there is no subwoofer you

may wish to reduce the Low Frequency Effects (LFE) channel to lessen its contribution to the bass going to

the remaining large speakers. Or, even with a subwoofer, you may just wish to reduce the overall LFE level,

especially in a smaller situation such as an apartment. Note that this effects only the separate LFE (.1)

channel available on Dolby Digital and DTS material it has no effect on the reproduction of normal bass from

the front, center, or surround channels.

5. Setup Room Equalization

Sometimes it may be desirable to boost or reduce the levels above or

below a certain frequency. This might be used to make up for small

deficiencies in the listening room or speakers. The equalization can

be applied only to certain speakers. This might be used to obtain a

more consistent timbre between unmatched speakers. For example,

if only the front speakers need to have frequencies above 10kHz

boosted 1dB, then room equalization setup menu will be adjusted as

shown right.

SETUP ROOM EQUALIZATION

Low

High

Frequency 100.0 Hz

10.0kHz

+1.0dB

Gain

Front

Center

Surround

Back

0.0 dB

Off

Subwoofer

Off

In some home theaters the center speaker is installed behind a

projection screen. The screen will tend to cut the high frequencies.

Applying a high boost only to the center channel can compensate for

↑↓ next item adjust ←→

MENU setup speakers

the losses introduced by the screen. Or possibly center and front left/right speakers are behind the screen. A

high boost can be applied to all three of these speakers with no effect on the surround or back speakers.

Shelving equalization helps to adjust level and frequency to aid in adjusting your room for a flat frequency

response. Room Equalization parameters are applied globally regardless of the selected user EQ (The

Variable EQ, the Loudness EQ, or the Vocal EQ). The graphs on the next page help describe how shelving

equalization can affect the frequency response for a room. Room equalization is applied in all listening

modes except DVD-Audio, Direct, and LtRt.

6. Room Resonance (Notch Filters)

No speaker has perfectly flat frequency response. These deviations in

frequency response contribute to each speaker's characteristic sound.

This is why one speaker might be preferred over another. When a

speaker is put into a room with walls, floor and a ceiling, reflected

sounds can cancel or reinforce one another which further alters the

frequency response.

SETUP ROOM RESONANCE

Test Tone 100.0 Hz

30.0 dB

Notch 1 150.0 Hz

0.0 dB

Notch 1 Width 146.4-153.6 Hz

Notch 2 100.0 Hz 0.0 dB

Notch 2 Width 146.4-153.6 Hz

Notch 3 50.0 Hz 0.0 dB

Notch 3 Width 146.3-153.6 Hz

Subwoofer Phase Invert

At higher frequencies, hundreds of small peaks and dips can be

measured in the frequency response. Attempts to remove all these

small deviations would result in colorations to the sound that may not

be desirable. The characteristic sound that made the particular

speaker(s) attractive could be completely lost. Even if the hundreds of

↑↓ next item adjust ←→

MENU setup speakers

small peaks and dips would be adjusted, it would only be correct for a single position in the room. Moving

your head just a few inches would require a completely different set of corrections.

At low frequencies, the picture is different. There are fewer peaks and dips, but they are much more dramatic.

The peaks and dips persist over a much larger portion of the listening area. Dips can't be corrected electroni-

cally. Putting out more power at the dip frequency won't help. If the original and reflected waves cancel each

other, they will cancel at 1 watt or 1000 watts. If you have major dips in the frequency response you can try

repositioning your speakers, particularly the subwoofer. Fortunately, dips in the bass response are typically

not that noticeable. When an instrument plays that particular frequency, the bass is lost, but the higher

harmonics of the instruments tone are still there. To some degree, your ear and brain will fill in the missing

information. Continued on next page...

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MENU SYSTEM SETUP

The situation is different for large low-frequency peaks. These peaks are what tend to shake the knick-knacks

off the shelves and result in an overall tubby sound to the bass. Fortunately, this CAN be remedied electroni-

cally…and without drastically altering the characteristic sound of your speakers. Typically a room will have 3

large peaks due to the distance between the front/back walls, left/right walls, and the floor/ceiling. B&K

provides 3 notch filters to address each of these peaks. A test tone generator is provided to assist in the

process of identifying the resonant peaks.

The test tone generator will generate an adjustable frequency tone between 20-300Hz. The test tone gener-

ator can generate the test tone at -42dB, -36dB and -30dB. The -30dB setting matches the levels you set up

in the speaker level menu assuming 75dB speaker calibration. Normally you would use this setting. Two

lower level settings are provided if you wish to perform these tests at lower volumes.

Initially, all filters are set to 0dB from the factory. Turn on the test tone generator at -30dB. Sweep the

frequency range to locate the 3 highest peaks. Using an SPL meter, note the frequency and the level of these

peaks. Also note the frequencies above and below the peak where the level is 3dB less than the peak.

Adjust notch 1 frequency to the frequency of the first peak. Adjust the notch level to the difference between

the peak level and the 75dB reference

Room Response Example

level. Adjust the notch width to the

setting nearest those where the peak or

peaks is 3dB lower. Repeat for notches

2 and 3.

This Room Response Example illus-

trates the frequency spectrum and how

notch filters and shelf equalization can

be effective. Note the “problem” spikes in

the room response curve in the diagram

at right. By applying the notch filters and

the shelving equalization, a flatter room

response can be obtained. Once the

notch filters are adjusted, they are

applied to all inputs in all music modes.

Notch Width - Some resonating

frequencies span a greater width in the

frequency spectrum than others. Each

notch width can be adjusted between 4.8

- 33.4Hz depending on how wide or

narrow each spike is.

Subwoofer Inversion - The

subwoofer phase can be inverted 180

degrees. Set the test tone to the

crossover frequency and adjust for the

loudest sound.

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MENU SYSTEM SETUP

SETUP INPUTS

This menu allows you to tell your preamplifier how you would like each input to operate. You may repeat the

following steps for each input by changing inputs on the top line of the menu or with the supplied remote

control.

1. Default Audio Modes - There are two major categories of audio, 2-channel and 5.1 multi-channel. Two

channel audio might come from an analog VCR, a PCM CD or a Dolby Digital 2.0 DVD. The first three selec-

tions in this menu for Default Mode, Default Speakers and 2-chan Decoder apply only to 2-channel audio.

The Default Mode defines the listening mode the preamplifier will select when the input is first chosen. This

default audio mode defines how you usually prefer to listen to a particular input. Do I usually listen to my

satellite preamplifier with some sort of surround processing (Pro Logic IIx or NEO:6)? Do I like my CDs in

pure stereo mode? Here is where you can set this up. The audio mode can be manually changed to a

different listening mode for a particular movie or CD, but the preamplifier will always remember your favorite

(default) mode that is set here. There are five audio modes in total; Mono, Stereo, Surround, Cinema or DVD-

Audio. Each audio mode can be configured for each input for the number of speakers and 2-channel

decoder used. See page 45 for a description of how to use each audio mode.

2. Default speaker Selections - A speaker selection setting can be

made for each audio mode. Do I like 2 channel material played back in

a five speaker configuration, or expanded to include the surround back

speakers? Do I like stereo in pure 2-channel or spread out to the center

and/or surround speakers? Set mono to 1, stereo to 2, surround to 7

and the system will remember each setting independently per each

input. The default speaker selection will be chosen each time the input

is selected. The speaker selection can be manually changed to a

different speaker selection for a particular movie or CD at any time. The

preamplifier will always remember the favorite selections that are set

here. See page 47 for a detailed description of speaker selections.

SETUP DVD INPUT

1 Default Mode

2 Default Speakers

3 2-chan decoder DPLIIx Movie

4 Multi-chan type Surr Movie

Surround

5 Level

6 Name

+2.5 dB

DVD

7 Component Video

8 DVD Audio Input

↑↓ next item adjust ←→

Yes

MENU setup system

If a speaker selection is chosen that is not possible based on the information you entered in the Speaker

Setup Menu, the preamplifier will automatically correct for this with no loss of audio information.

3. 2-Channel Matrix Decoders - Your preamplifier includes the latest 2-channel surround decoders from

Dolby and DTS. Do you usually like your CDs in DTS NEO:6 Music?; Your 2-channel DVDs in Dolby Pro

Logic IIx Movie? You can choose your favorite (default) decoder here for each input. If you don't like that

mode for some particular CD, you can manually change to a different mode using the SR10.1 remote

supplied. The preamplifier will always remember your favorite settings for each input.

4. Multi-Channel Filter Types - When the preamplifier detects multi-channel Dolby Digital or DTS material it

will automatically choose to use all of the available speakers in the system. (It is important to configure the

preamplifier for how many speakers there are in the speaker setup menus).

There are some choices for multi-channel audio. Do I like my DTS CDs in Surround Music? Do I like my 5.1

movies in Surround Movie? The preference can be set here. The multi-channel listening mode can be

manually changed for a particular movie or CD. The preamplifier will always remember the favorite multi-

channel mode that is set here. See page 8 for descriptions of multi-channel modes.

5. Level - Each input gain can be adjusted +/- 6dB. Occasionally certain source devices, particularly analog

sources, will have higher or lower than normal output levels. This setting allows the level to be adjusted so

that there are no drastic volume changes when you switch inputs. Try a few different discs or channels before

adjusting the level. It might be that a particular station has high or low output level rather than the entire satel-

lite receiver.

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MENU SYSTEM SETUP

6. Input name - Five characters maximum. From the factory, the preamplifier will display source names that

match those printed on the back of the preamplifier and on the supplied SR10.1 remote. These names can be

changed to match the type of source that is being used. For example, if a cable box is connected on the SAT

input instead of a satellite receiver, the SAT name can be renamed to CABLE. The AM/FM Tuner name

cannot be changed.

7. Component Video Assignment - The preamplifier includes 3 component video inputs that can be

assigned to any of the 7 A/V inputs. Component video is unassigned on all inputs from the factory. For

example, if there is a DVD player that has component video outputs, component input 1 can be assigned to

the DVD input. Connect the DVD player's component outputs to component input 1. When DVD is selected,

the component output will source from component input 1.

If the component video has been assigned for any input, transcoding from S to composite or composite to S

will continue.

8. DVD-Audio input Assignment - DVD-Audio and Super Audio CD (SACD) introduce a third category of

audio: multi-channel analog. The preamplifier provides one set of multi-channel analog inputs that can be

assigned to any one A/V input except TAPE. When DVD Audio is selected as YES for a particular input, the

default listening mode is automatically changed to DVD-Audio with 7 speakers. (The number of speakers

used can be changed) When YES is selected for a particular input, any previously selected DVD-Audio input

will automatically be reset to NO. Selecting 5 speakers is direct pass through.

SETUP PRESETS

The Setup Presets menu describes how the presets will operate.

SETUP PRESETS

1 Volume in Presets

2 Preset Names

3 ZA Favorite Recall

4 ZA Favorite Presets

5 ZB Favorite Recall

6 ZB Favorite Presets

Yes

Auto

ENTER

Volume in Preset - YES or NO. If the volume of the preamplifier should

be set to the preset level when the preset is recalled, select YES. If the

volume of the preamplifier should remain at the current listening level

when the preset is recalled, select NO.

ENTER

Preset Names - AUTO or MANUAL. When saving a preset, the system

automatically generates a simple name for the preset. The generic

name consists of the source input and volume level. The name can be

changed before saving the preset. The automatic naming can be

defeated so that a custom title that was previously entered will not get

erased if the preset settings are re-saved. Turning auto naming off

(manual) allows that the name that is already present in the preset to be

re-used when a new preset is saved to that location.

↑↓ next item adjust ←→

MENU main menu

ZONE 1 FAVORITES

Preset 0 Yes

‘AM Traffic

‘

Zone A Favorite Recall - AUTO or ENTER. A preset can be recalled in

one of two ways. Enter requires the ENTER button to be pressed to

recall the preset. AUTO will allow the preset to recall automatically as

you scroll through presets using the channel up/down buttons.

Zone A Favorite Presets - Press ENTER to bring up the FAVORITE

PRESET MENU. Any preset can be recalled by typing in its number.

Use this menu to mark or un-mark presets as favorites (Yes or No).

Favorite presets can be recalled when using the preset up and down

buttons. This menu can also be used to edit preset names.

↑↓ next item adjust ←→

0..9 +10 preset recall ENT

MENU system setup

Zone B Favorite Recall - Zone B has a separate set of presets with the same options as the Zone A presets.

Zone B Favorite Presets - Press ENTER to bring up the FAVORITE PRESET MENU. Any preset can be

recalled by typing in its number. Use this menu to mark or un-mark presets as favorites (Yes or No). Favorite

presets can be recalled when using the preset up and down buttons. This menu can also be used to edit

preset names.

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MENU SYSTEM SETUP

SETUP DISPLAYS

Front Panel - Describes the possible selections for the brightness of the front panel display. Bright, medium,

dim.

OSD Color - Set the preferred color for the OSD menu. Default setting

is blue. Select from Blue, Purple, Pink, Aqua, Lilac, Yellow, Red, or

Green.

SETUP DISPLAYS

1 Front Panel

2 OSD Color

3 On Screen Major Change

4 On Screen Time 3.0

Bright

Blue

On Screen - All changes that are made to the preamplifier (volume,

input, tuner frequency, etc. are displayed on the front panel. You can

choose how much information is also displayed with the On-Screen

Display (OSD).

↑↓ next item adjust ←→

Major Change - OSD will display changes to input and

saving/recalling presets.

MENU main menu

All Changes - OSD will display changes to input, saving/recalling presets, tuner station entry, Volume,

bass, treble, channel gain and decoder adjustments.

Off - OSD will only display when the INFO button is pressed from the remote control or when

entering into the menu system.

On Screen Time - This setting defines the length of time the info screen will display through the video output.

The info screen timer may need to be adjusted when using video devices that auto detect the video resolu-

tion. Sometimes high definition monitors need more time to adjust to the low definition resolution of the

splash screen. Most monitors will be compatible with the default time of 3 seconds.

SETUP MUSIC MODES

B&K supports two different two-channel decoders; DTS NEO:6 and

SETUP MUSIC MODES

Dolby Pro Logic IIx. Each decoder supports surround adjustments that 1 NEO:6 Center Image 0.3

can be made pertaining to how audio information is directed throughout

2 PLIIx Center Width

the soundstage. These adjustments apply only to the music mode of

these decoders. In this menu you can set the preferred settings. The

settings can be adjusted on the fly using the remote. The settings will

always return to the settings in this menu when you first select the

music mode. See page 7 for a description of what these settings do.

3 PLIIx Dimension

rear

4 PLIIx Panorama

front

YES

↑↓ next item ENT select

MENU main menu

MEMORY BACKUP/RESTORE

This menu allows a backup to be made of all the customized settings that

have been made to the Reference 50 Series2. The options in this selec-

tion are BACKUP and RESTORE. Even if a backup is not made, any

customized settings will not be lost during normal day to day operation.

It is a good idea to create a backup once all the settings have been

made. These settings are then stored on an internal EEPROM. Select

RESTORE, if you desire to recall the memory backup.

MEMORY BACKUP RESTORE

1 Memory Operation Backup

Save ALL memory

settings in EEPROM

ENT perform

adjust ←→

Note: A Factory Reset will erase of a previous memory backup.

MENU main menu

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MENU SYSTEM SETUP

UNIT INFORMATION

Unit information provides hardware information about your preamplifier.

Unit - The model of the preamplifier

UNIT INFO

1 Unit

2 software version 1.00

3 S/N 123456789

Ref 50 Series 2

software - The software version currently running in the hardware.

S/N - Serial Number

4 BKC-DIP 1.2.01

5 TUN-PLL LC72146

next item

MENU Main Menu

BKC-DIP - B&K Components Device Interface Protocol version.

TUN-PLL - Tuner information

ADVANCED MENU

The advanced setup menu allows the user to adjust the following features. An advanced menu navigational

flow chart is located on page 58 of this manual. The categories that are reserved for the advanced menu are

as follows:

•

Zone maximum volume level.

The IR code-set for each zone

Power on Titles

Surround Mode Detection

Plug n Play timing

DSP usage

+12 Volt Control Outputs

User Security

RS-232 Settings

From the factory, the advanced menu is hidden from user access. To reveal the advanced menu,

simultaneously press the UP, DOWN and ON/STANDBY buttons. Once these three buttons have been

pressed, the Security Options Menu will display with “ADVANCED VISIBLE” highlighted. This will indicate the

advanced menu is accessible. If the IR or front panel has been locked, this button press sequence will unlock

them. After enabling advanced menu, the system setup menu will change:

Advanced Locked

Advanced Unlocked

SETUP SYSTEM

1 Speakers

2 Inputs

1 Speakers

2 Inputs

3 Presets

4 Displays

3 Presets

4 Displays

5 Music Modes

6 Memory Backup/Restore

ꢀ

5 Music Modes

6 Memory Backup/Restore

7 Advanced

↑↓ next item ENT select

MENU main menu

↑↓ next item ENT select

MENU main menu

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ADVANCED MENU SYSTEM SETUP

Descriptions of each option of the advanced system setup menu are as follows:

Zone ‘1’ Home Theater - Allows adjustments for the main home theater zone. Set the max volume,

zone ID, Record loop and surround mode options.

ADVANCED SYSTEM SETUP

1 Zone ‘1’ Home Theater

2 Power On Titles

3 Control Out

4 Security Options

5 DSP Usage

6 RS-232 Control Port

7 Plug and Play Timing

8 Zone ‘B' Second Zone

Power On Titles - Customize power on titles for customized

personal greetings.

Control Out - Configure the 12VDC control outputs for control of

external devices.

Security Options - Lock the front panel, memory or front panel IR

sensor.

DSP Usage - Displays processor status in MIPS.

RS-232 Control Port - Configure the main RJ-45 jack for RS-232

communication.

↑↓ next item ENT select

MENU main menu

Plug n Play Timing - Adjust the timers for the digital Plug n Play

system. This is useful when adjusting for digital error muting.

Zone ‘B’ Second zone - Allows adjustments for the second zone. Set the max volume, zone ID, Record

loop and the Zone A&B linking options.

Zone ‘1’ Home Theater

Max Level - Set the maximum volume for the main theater zone. This can be used to protect your speakers

or ears from inadvertent excessive volume.

ADVANCED ZONE A SETTINGS

1 Max Level

2 Zone ID

3 V1 Output

4 Surround Modes

Zone ID - The product ID (IR code set) can be adjusted if operation

+15 dB

with other B&K is gear is required. The default ID is 001 for the main

theater zone and 002 for Zone B. The preamplifier can be assigned to

any ID (B&K code-set) between 001 and 099. This allows ninety nine

different B&K surround processors to operate independently using

different remote controls. This feature is typically useful if multiple

surround processors are used in the same system (B&K CT whole

house audio systems). Zone A and Zone B cannot be assigned the

same code set. The code-set 000 operates both zones of the pream-

plifier simultaneously.

Tape

Auto

↑↓ next item adjust ←→

MENU advanced setup

NOTE: If the code set of the preamplifier is changed, you will need to reprogram the IR code of the remote

control being used. B&K offers the SR10.1 programming remote (supplied with the B&K Reference 50

Series2), the CK1.2 Keypad or MZ-128 remote.

V1 Output - TAPE or LINE. The V1 output can be configured as an output for a second recording device in

Zone A (TAPE). The V1 output can also be configured as a Zone A line output to connect a second video

monitor and/or audio amplifier (LINE). As a record output, V1 will output the analog audio and video from the

selected input in Zone A except when V1 is selected. This prevents feedback through the recording device

which could damage your speakers. As a line output V1 will output the analog audio and video from whatever

input is selected in Zone A. Record/Line settings also apply to the Zone A optical and coaxial digital outputs.

Surround Modes - Select AUTO or MANUAL. Auto or manual engages or disengages the B&K Plug n Play

System.

Auto - If set to AUTO, each time an input is selected the Plug n Play system will scan the various source

signals and determine if a multi-channel digital bitstream is present. The main theater zone will then use

the maximum number of hardware speakers specified in the speaker setup menu.

Manual - If set for MANUAL, each time an input is selected, the user will select the audio mode that will

be used with the source signal, regardless of a what bitstream is present. Manual mode allows the

preferences setup in the Surround audio mode to apply both to multi-channel and 2 channel source input

signals.

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ADVANCED MENU SYSTEM SETUP

Power on Titles

POWER ON TITLES

Personal power on greeting can be programmed to display on your

B&K’s front panel display. Both power on lines contain 16 alphanumeric

characters. Power on titles will appear when the preamplifier is taken out

of Standby.

1 Power On Line 1

' BK Components '

2 Power On Line 2

' * Digital DNA '

Have fun with your power on titles, and try to WOW everyone. Power on

titles are easy to set up using BKcSuite setup software.

↑↓ next item ENT select

MENU advanced setup

Control Output (12VDC control)

The preamplifier contains 4 control outputs. Control outputs are supplied

to control external source devices such as amplifiers, projection screens,

curtains, etc. The control outputs can also be configured to control an

external device with IR. Each control can be configured as shown in the

following table. Each input can dictate how that each control output can

function. Control outputs are terminated using 1/8” (3.5mm) mono mini

jacks. +12VDC control outputs supply 50mA maximum current each.

Actual voltage can vary between 10-12VDC depending on the load. See

below for control output table.

CONTROL OUT 1 SETUP

1 TUNER

2 V1

3 V2

Phones

4 TV

5 DVD

6 CD

7 SAT

8 Tape

Off - Control output is off when the input is selected.

Zone A - The control output is on when Zone A is on and the input is

selected in Zone A.

↑↓ next item adjust ←→

MENU advanced setup

Zone B - The control output is on when Zone B is on and the input is

selected in Zone B.

Zone A / B - The control output is on when Zone A or Zone B is on and that source is selected in either

zone.

Remote - IR will pass-through from the front panel or a connected keypad to the control output. An IR

emitter can be connected for control of an IR device. IR will only pass-through when the source is

selected and the control is set for remote.

RS-232 - The control output can be controlled from a RS-232 command or RS-232 controller.

Phones - The control output is off when the preamplifier is in headphone mode. This way, if an external

amplifier is used, it will be off when the headphones are in use.

Each control output can be configured differently if desired. The following table defines the possible choices

each control output can be set to. Note the shaded boxes are the default settings.

Control

Possible selections for each Input

Phones

(default)

Off

Zone A

RS-232

N/A

Zone B

(default)

Zone A

Zone A/B

Remote

RS-232

Zone A/B

(default)

Zone B

Remote

(default)

Zone A/B

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ADVANCED MENU SYSTEM SETUP

DSP Usage

This screen monitors the amount of processing power being used.

DSP USAGE

1 Utilized DSP

Processing Power

165 MIPS

Expressed in MIPS (Millions of Instructions per Second)

MENU advanced setup

Security Options

In the security menu, the user can protect the preamplifier from accidental

changes to unit settings or reprogramming. Changes made to the security

menu will not take effect until you exit the setup menu. Once a security

option has been activated, you may re-enter this menu by simultaneously

pressing the UP, DOWN and STANDBY.

SECURITY OPTIONS

1 Advanced Menu

2 Memory Locked

3 Front Locked

4 IR Locked

Visible

Advanced Menu - Visible or Hidden. This selection will hide or un-hide

the advanced options menu. The advanced menu is choice seven in the

System Setup menu. If the advanced menu is locked (default) pressing

UP/DOWN/STANDBY will unlock the advanced menu and automatically

display the security options menu.

↑↓ next item ENT select

MENU advanced setup

Memory Locked - Locking memory will prevent changing of your presets or system settings.

Front Locked - Locking the front panel will only allow operation of your preamplifier with a B&K remote or

RS-232 computer Interface. Note if you inadvertently lock the front panel, simultaneously pressing STANDBY,

UP and DOWN on the front panel will always enter the advanced security options to allow changing these

settings. Locking the Front will still allow RS-232 “F” messages (front panel display) to be accepted.

IR Locked - YES or NO. Locking the IR will deactivate the IR sensor on the preamplifier front panel. If the

front panel IR is locked, it will not allow a connected keypad or IR sensor to operate. Locking the IR will still

allow RS-232 “I” messages (IR) to be accepted.

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ADVANCED MENU SYSTEM SETUP

RS-232 Control Port

12v

The RS-232 port refers to the main RJ-45 connection

located on the preamplifier's back panel. The RJ-45

contains connections for transmission and reception of

RS-232 data. See pin-out at right. The RJ-45 also

supports power supply and IR input for CK1.2 Keypad

interface.

12VDC Power Supply

Signal/Common Ground

RS-232 Host Transmit

RCV

RS-232 Host Receive

IR Input

Port - When disabling the RS-232 port, RS-232 strings

will be neither transmitted nor received through the

main RJ-45 jack. By default the RS-232 port is enabled.

RCV

CTR

12v IR

12v

CTR

12VDC Control Output

Baud rate - The default baud rate is 9600. B&K does not recommend using any baud rate other than 9600.

When a Baud rate other than 9600 is used, Keypad status will not function.

Echo - Enabled or Disabled. This setting is for those with external control systems communicating to B&K

products via RS-232. Echo will repeat RS-232 transmissions received through the main RJ-45 receive port.

Feedback (RS-232 Continuous Reply):

None (Default) = Neither BKC-DIP Update or Reply is generated.

Update = A change affecting a logical zone from the Front Panel or

B&K IR generates an update message representing the specific front panel

button or B&K IR command. The preamplifier must then be polled to deter-

mine the current status.

Reply = When set to “REPLY”, the preamplifier will automatically

generate BKC-DIP reply messages to allow unsolicited continuous feedback

to an external RS-232 controller. A change affecting Zone A or Zone B from

the Front Panel or B&K IR generates a reply message representing the new

status of the parameter that was changed.

RS-232 PORT SETUP

1 Port

2 Baud rate

3 Echo

4 Feedback

5 Receive ID

6 Transmit ID

Enabled

9600

Disabled

None

↑↓ next item ENT select

MENU advanced setup

Typical format example of a BKC-DIP Reply :

An example BKC-DIP Reply message the Reference 50 Series2 will automatically generate when a master

volume change is executed in Logical Zone 1 is (0,R,P1=FF,1=60;). Reply message Logical Zone 1 current

Preset parameter Volume value is set to 60 hex or 0dB (assumes 0dB is the current setting).

“0” is the transmit ID

“R” is the BKC-DIP Reply message.

“P1=FF” is the BKC-DIP command for the current preset in logical Zone 1 (P1: main theater zone ID).

“1=60” is the current preset parameter (1: Volume), is set to the Hex value of 60 (volume at 0dB ).

For a complete list of B&K RS-232 parameter Protocol, see the Series_IIIS2_10000.pdf or greater located in

the documentation of BKcSuite or online at B&K’s website.

All (Both) = Outputs both a BKC-DIP Update and Reply messages.

Receive ID / Transmit ID - This is the identifier in B&K RS-232 protocol that allows B&K to “listen” (receive

ID) or “talk” (transmit ID) to other B&K products. Change this identifier if you are using an external automa-

tion system to control more than one B&K products in series. The transmit and receive IDs are denoted by

the first number in an RS-232 message i.e. (0,S,I,1=45;).

Note - If you change the Receive or Transmit ID, it does not affect setup with BKcSuite.

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ADVANCED MENU SYSTEM SETUP

Plug and Play Timing Setup

Plug and play timing pertains to the internal delays associated with the Plug n Play audio detection system.

DO NOT ADJUST THESE PARAMETERS UNLESS THERE IS A PROBLEM HEARING AUDIO

Your preamplifier has default audio Plug n Play settings that work with the majority of A/V sources and digital

audio bitsreams. However, with the introduction of new A/V products into the market place, these Plug n Play

audio detection parameters may need to be adjusted to improve upon the listening experience. An example

might be that there is an inordinate amount of audio pops or snaps while changing Cable, HDTV or SAT

channels. The quality of the original digital bitstream depends on many factors. It is our desire to minimize the

amount of audio pops and snaps that may be transmitted thru to the speakers. Your preamplifier does not

“filter” any imperfect digital bitstreams, nor does it make the digital bitstream a valid signal. However, because

audio pops snaps are undesirable, your preamplifier will try to mute the audio before you hear it when there is

a digital audio bitstream error. Although your preamplifier’s muting circuitry may stop most of the digital errors

from being heard, it does not guarantee that a digital error may never be heard.

The Plug n Play menu may be used to adjust mute times while the preamplifier is automatically switching

between different types of digital audio formats (AC3 / DTS 5.0 / DTS 5.1, PCM). Usually these audio pops

and snaps may be traced to a digital error on the incoming digital audio bitstream and corrected with a simple

Mute Time adjustment.

Default Settings

Mute Time

- 0.5 Sets the mute time for use with invalid digital audio information. In

addition it is used to mute when a digital signal first appears or changes modes. Most notably, some DVD

recorders output about 1.5 seconds of invalid digital bitsreams after you close the drawer.

Digital Sticky

- 2.0 Only applies to changes from any digital audio mode back to analog.

Changes from analog to digital are always fast. This parameter may be set long because most Cable and

SAT receivers drop the digital audio bitstream when changing channels and there is really no need to revert

back to analog. Note, some Cable and SAT receivers only output analog audio for certain broadcast

channels. If the Digital Sticky parameter is set too long there may be a longer period of silence before you

hear the audio with an analog only broadcast channel.

Mode Sticky

- 1.0 Only applies to changes from AC3 or DTS to PCM. Changes from PCM to

AC3 or DTS are typically fast. Many DVD players drop to PCM when skipping tracks. There is no need for the

preamplifier to drop to PCM processing during this interval. However, because many DVDs contain AC3,

DTS and PCM data on different tracks, setting the Mode Sticky parameter too long may cut off the audio from

the beginning of AC3, DTS or PCM digital audio bitsreams.

Parameters Sticky - 1.0 Applies to how quickly the preamplifier will react to changes in sample

rate, number of speaker channels in the bitstream, etc. Occasionally some players erroneously indicate these

changes which causes the preamplifier to needlessly mute and adjust itself to these new parameters. Setting

this parameter longer reduces the chance that the preamplifier will respond to an erroneous change but does

increases the likelihood of muting the audio at the start of an audio playback.

PLUG AND PLAY TIMING

1 Mute Time

0.5

2.0

1.0

2 Digital Sticky

3 Mode Sticky

4 Parameters Sticky

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ADVANCED MENU SYSTEM SETUP

Zone 2 ‘B’ Second Zone

Level Control - Variable or fixed. The second zone can be configured

for a fixed volume level if external volume control is desired.

ADVANCED ZONE B SETTINGS

1 Level Control

2 Maximum Level

3 Zone ID

Variable

+15 dB

Max Level - Set the maximum volume for the second zone. This can

be used to protect your speakers or ears from inadvertent excessive

volume. If Level Control is set to fixed, the max level will define the

fixed volume level output for Zone B.

4 V2 Output

5 Link Input to Zone A

6 Link Power to Zone A

Tape

↑↓ next item adjust ←→

Zone ID - The product ID (IR code set) can be adjusted if operation

with other B&K is gear is required. The default ID is 001 for the main

theater zone and 002 for Zone B. The preamplifier can be assigned to

MENU advanced setup

any ID (B&K code-set) between 001 and 099. This allows ninety nine different B&K surround processors to

operate independently using different remote controls. This feature is typically useful if multiple surround

processors are used in the same system (B&K CT whole house audio systems). Zone A and Zone B cannot

be assigned the same code set. The code-set 000 operates both zones of the preamplifier simultaneously.

NOTE: If the code set of the preamplifier is changed, you will need to reprogram the IR code of the remote

control being used. B&K offers the SR10.1 programmable remote (supplied with the B&K AVR507 Series2

and AVR505 Series2), the CK1.2 Keypad or MZ-128 remote.

V2 Output - TAPE or LINE. The V2 output can be configured as an output for a second recording device in

Zone B (TAPE). The V2 output can also be configured as a Zone B line output to connect a second zone B

video monitor and/or audio amplifier (LINE). As a record output, V2 will output the analog audio and video

from the selected input in Zone B except when V2 is selected. This prevents feedback through the recording

device which could damage your speakers. As a line output V2 will output the analog audio and video from

whatever input is selected in Zone B.

Link input to Zone A - YES or NO. The second zone’s source selection may be linked with the Zone A

source selection. In operation, whenever a source selection is made in the main theater zone, the source

linkage will cause the same source to be selected in the second zone. Independent source selection is still

available with the Zone B remote control, but any Zone A source selection supersedes the previous Zone B

selection.

Link power to Zone A - YES or NO. Zone B power On/Off may be linked to Zone A . In operation, whenever

power is set to ON in Zone A the power linkage feature will cause power to be set accordingly on Zone B.

Zone B Independent power On/Off is still operational with the Zone B remote control, but any Zone A power

command supersedes the previous Zone B power On/Off.

FACTORY RESET

Sometimes a factory reset is necessary in order to clear problematic symptoms sometimes experienced in

the field. A factory reset will clear all system settings and all presets. A factory reset will also clear any infor-

mation backed up onto the EEPROM that may have been accomplished by a Memory Backup.

To perform a Factory Reset on a Reference 50 Series2,

simultaneously press and release the ON/STANDBY, DOWN and MENU buttons.

Once you see "Reset Preset" on the front panel you can release the buttons. A reset will take approximately

60 seconds.

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REMOTE CONTROL

SR10.1 REMOTE CONTROL OPERATION

Your B&K preamplifier is supplied with a state-of-the-art remote control. The SR10.1 is a

computer programmable learning remote. It can be programmed to control any or all of the

components in your system using IR. The setup software CD-ROM for the remote is supplied

in the box with the SR10.1. You can also download the setup software from the B&K website

at www.bkcomp.com/support . Be sure to perform a Live Update after the software has

been installed on your PC. For instructions on programming the SR10.1 see page 51.

Bktask.lnk

BKcSuite

The default program of the remote is setup to control the main theater zone of the B&K preamplifier. Up to

20 devices can be stored and programmed on the remote. 10 devices are pre-programmed onto the main

page for convenience. A definition of each default device button is as follows:

B&K: Operates the main theater zone of the preamplifier. It is pre-programmed for B&K Control.

SAT: Selects the SAT input in the main theater zone.

DVD: Selects the DVD input in the main theater zone.

CD: Selects the CD input in the main theater zone.

TAPE: Selects the TAPE input in the main theater zone.

TV: Selects the TV input in the main theater zone.

V1: Selects the V1 input in the main theater zone.

V2: Selects the V2 input in the main theater zone.

FM: Selects and controls the FM tuner in the main theater zone.

AM: Selects and controls the FM tuner in the main theater zone.

OFF

MAIN

B&K

SAT

Each device can be programmed to control the source associated with the

input on the B&K preamplifier. The setup software contains a database of

various manufacturers' IR codes for devices, such as DVD players, CD

players, music servers, TVs and more. IR commands can also be learned

directly into the SR10.1 remote from the original source remote control.

DVD

TAPE

PAGE 1

The B&K device button in the figure left contains the IR commands that

pertain specifically to the B&K preamplifier. Once the B&K device has been

selected, press the PAGE button to step through the 4 pages of IR commands

for the device. Press the MAIN button to return to main page 1. Press FAV to

access favorite stations or common commands. The B&K device button

layout is as follows:

MAIN

MUTE

VOL

GUIDE

INFO

EXIT

PAGE 1 = Source input selections. The Z button is available for temporarily

changing the zone control of the remote. i.e. pressing Z then 2 will control the

second zone temporarily.

PAGE 2 = Audio mode selections.

PAGE 3 = Imaging adjustments and user EQ selection. SLEEP enables the

sleep timer and steps through timer increments. SAVE will save a preset

PAGE 4 = Center channel, rear channel, subwoofer, bass and treble gains.

+10

ENT

The Unit Operation section (page 40) of this manual documents the various

ways of using the functions of the preamplifier from the SR10.1.

B&K SYSTEM REMOTE

SR10.1

B&K

DVD

B&K

SAT

DVD-A MUSIC

IMG- IMG+

CNTR- CNTR+

CINMA MOVIE

DIM- DIM+

PAN- PAN+

SLEEP

REAR- REAR+

SURR

GAME

SUB-

SUB+

STER PLIIX

BASS- BASS+

TAPE

MONO NEO:6

PAGE 2

SAVE

TREB- TREB+

PAGE 4

PAGE 1

PAGE 3

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OPERATION & CONTROL

UNIT OPERATION

The following pages outline the normal day-to-day operation of your preamplifier from the supplied SR10.1

remote control. All unit functions can also be directly controlled from the front panel. The SR10.1 remote is

capable of controlling both the B&K preamplifier plus other source gear in your system. This section will

outline the usage of the SR10.1 Remote with your B&K processor. For a brief overview of the SR10.1

programming software, refer to page 51. The full programming manual is available on our website. All

programming software and product manuals are available online at www.bkcomp.com.

Master Power On/Off

The master power switch located on the front panel of your preamplifier must be “ON” (pressed in) for the

preamplifier to operate. When this switch is OFF (pressed out) all power is shut off. This will prevent turning it

back on with the remote control or keypad. For normal day to day operation, leave the master power switch in

the ON position. Use the ON/STANDBY function for daily power on and off. This will allow the preamplifier to

be turned on and off from the remote control or keypad.

Whenever turning on the master power switch, you must wait approximately 15 seconds while the processor

restores its internal memory and initializes system parameters. You may want to turn off the master power

switch only when your preamplifier will be idle for extended periods of time or during periods of power line

fluctuations. The memory will not be lost while the master power switch is off.

On / Standby

For normal day to day operation, you will put your preamplifier in STANDBY or by using the ON and OFF

buttons of the remote control. Standby mode keeps minimal functions running in order to allow the remote

control or keypad to quickly power the unit up. Note that the front panel ON/STANDBY button is lit while your

preamplifier is in standby and is not lit when your preamplifier is operating. The front panel display is off

during standby. The remote control or keypad has discrete power OFF and ON IR commands to put the

preamplifier in and out of standby mode. The power on titles will display every time the unit is brought out of

standby mode.

Adjusting Volume

The front panel VOLUME control knob will control the volume. The volume knob is on the right side of the

front panel. Volume can also be adjusted up or down using the remote control or a keypad. Volume ranges

from -96dB to +15dB. 0dB is Dolby Reference level.

Center, Rear and Subwoofer Volume

The center channel, rear channels (surrounds and backs together) and/or the subwoofer volume levels can

be tweaked independently. To adjust the volume for these channels, use the CNTR-/+, REAR-/+ or SUB-/+

from the remote control to adjust. These are temporary level adjustments and will reset to zero after an input

change or standby on/off.

Source Selection

The front panel is equipped with a Source knob that allows you to rotate it to select any of the 7 inputs or the

internal AM and FM tuner. The source knob is on the left hand side of the front panel. From the remote, press

the button corresponding to the input you wish to select.

When using DVD-Audio, it is recommended to set DVD-Audio as the default audio mode for that particular

input. If DVD-audio is not set as the default mode, first select the input to which DVD-Audio has been

assigned, then press the DVD-A button from the remote control.

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OPERATION & CONTROL

Z1 Operation - Theater

The Z1 Operation menu is provided to aide in the Theater zone opera-

tion. It does not have to be used in order to control the Theater zone.

To access this menu, press the Menu button on the remote or front

panel, scroll down and select choice three; Z1 Operation - Theater.

This menu provides current settings for the main Zone A. The audio

input and video input can be selected independently. If the Tape input is

selected, the tape output for recording can selected independently. If

the AM or FM tuner is selected, the frequency can be changed. The

master volume and individual speaker volumes for center, sub and rear

(surrounds and backs together) can be adjusted. The surround mode

and number of speakers used can be selected. If a 2-channel music

ZA OPERATION

Source FM

Video V1

Stereo 103.3

Volume -10.0

Mode Surround Center

DPLIIx Music Rear

Spkrs 6 Sub

Eq 2 Loudness

↑↓ next item adjust ←→

0..9 +10 recall preset SAVE

MENU main menu

+3.5

-1.5

+1.5

mode is selected, hitting ENTER when Mode is selected will allow adjustment to the music mode parameters.

The user EQ selection can be made. If the variable EQ is selected, pressing ENTER will allow you to adjust

the bass and treble settings for the variable EQ. Any changes made in this menu will be reset when the input

is changed. This operation menu is very helpful when setting up presets. You can see exactly what settings

you have setup up before the preset is saved. To save a preset press the SAVE button. See page 49 for

more information on presets.

Sleep Timer

The preamplifier contains a sleep timer. The sleep timer has the ability to turn the preamplifier off (set to

Standby) after a set time period. Sleep timer options span from 30 minutes up to 4 hours in 30 minute incre-

ments. Repeatedly pressing the sleep button will step through the timer increments. The sleep button is

located on page page 3 of the B&K device on the supplied SR10.1 remote control.

Z2 Operation - Second Zone

The Z2 Operation menu is provided to aide in the operation of the

second zone. It does not have to be used in order to control the second

zone. To access this menu, press the Menu button on the remote or

the front panel, scroll down and select choice four; Z2 Operation - 2nd

Zone. The audio input and video input can be selected independently.

If the V2 input is selected, the V2 output for recording can selected

independently. If the AM or FM tuner is selected, the frequency can be

changed. The master volume can be adjusted. Any changes made in

this menu will be reset when the input is changed. This menu is very

helpful when setting up presets. You can see exactly what settings you

have setup up before the preset is saved. To save a preset press the

SAVE button. See page 49 for more information on presets.

ZB OPERATION

Power Off

Source DVD

Video DVD

Record DVD

Volume -25.0

↑↓ next item adjust ←→

0..9 +10 recall preset SAVE

MENU main menu

Zone Operation Button

To set the preamplifier for temporary operation of either Zone 1 or Zone 2 use the Zone (Z) button on the

SR10.1 remote. It is located on page 1 of the B&K device. See page 39 for default remote layout. Press

the zone button, then the zone ID code. The default zone codes are as follows:

1 - Operates the main theater zone.

2 - Operates the second zone.

0 - Operates both zones simultaneously.

Once the zone button and zone ID is pressed, the remote control will temporarily operate the zone until three

seconds elapse with no command issued. The zone ID can be changed if desired (theater zone page 33 or

second zone page 38).

If a permanent method of controlling other zones is desired, the SR10.1 can be reprogrammed with the

appropriate zone code assigned to one of the device buttons.

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OPERATION & CONTROL

AM / FM Tuner Operation

All TUNER operations require the preamplifier source be set to TUNER. Press the FM or AM button to

access the tuner.

Manual Tuning - From the remote control or the front panel, tap the UP or DOWN arrow to tune one

frequency step at a time. Hold the up or down arrow to automatically seek up or down to the next available

strong station. Very strong stations may cause seeking to stop one step away from the station’s actual

frequency. Check one step above or below if you are not sure. Your favorite stations can be saved in presets

(see page 49).

Direct Frequency Entry Tuning - To directly recall a tuner frequency, press the FM or AM button, then enter

the frequency of the station within the next 3 seconds.

Example - Button press steps for directly entering the radio station for 103.3 FM = FM - 1 - 0 - 3 - 3

Headphone Operation

Headphone mode allows output of the source selection using a set of headphones. The headphone jack

uses a 1/4” (6.3mm) stereo jack. From the remote control select STEREO - 0. SURROUND - 0 is identical

to STEREO-0. To select headphone mode from the front panel, select a source, press the MODE button.

Press the UP or DOWN arrows to step through until the preamplifier switches into headphone mode. When

in headphone mode, CONTROL OUT #1 is set to off (default). This feature allows your preamplifier to turn off

external amplifiers or powered subwoofers with compatible 12VDC CONTROL inputs. The preamplifier will

mute the surround output channels when in headphone mode. Headphone mode can also be set up to be

recalled using a preset. (See speaker selection page 47 ).

While in 'HEADPHONE', equalization features of the preamplifier remain operational. The unit will stay in

headphone mode until a different speaker selection is made. This feature allows the 'Headphone' selection to

stay in effect until the unit is put into STANDBY.

WARNING: In order to provide full range audio to your headphones, it is necessary to override the

bass management processing in your preamplifier. If you are using external amplifiers or powered

speakers with no CONTROL OUT capability then full range audio will be sent to your front left and

right speakers. If you have small front speakers we strongly suggest you manually turn off your

external amplifiers or powered speakers before selecting 'HEADPHONE' operation. Otherwise speaker

damage may occur.

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OPERATION & CONTROL

FRONT PANEL DISPLAY OPERATION

The front panel display is capable of displaying 16 characters. The first five characters identify the current

source input. The remaining 10 characters identify the the audio mode and the number of active speakers.

All changes to volume, input, audio mode, etc. will be displayed for a few seconds on the front panel. When

no changes are in progress, the front panel will display the input and surround mode. Some abbreviations are

necessary. The various abbreviations are as follows:

Display definitions:

4 = 4 Surround

4B = 4 Back

DTS

= DTS

DOLBY D

= Dolby Digital

DTS ES DSC = DTS Discrete 6.1 DOLBY D EX = Dolby Digital Surround EX

= 5 Surround

DTS ES MTX = DTS Matrix 6.1

NEO6

PL2X

= Dolby Pro Logic IIx

5B = 5 Back

SUR = Surround

= DTS NEO:6

= Music mode

= Movie mode

Processor Status

Processor status will display after an input

DVD

DTS SUR 5B

selection or any time by pressing the INFO or

ENTER button on the remote control. INFO

will display the status on both the OSD and

front panel, while ENTER will display status

Source Input

Audio Mode Description and

number active speakers

on the front panel only. The info status will display status for the source input selection, bitstream type,

sampling rate, video type, audio mode, speaker selections, EQ setting, and surround processing types. The

video source type is very important if you are mixing component, composite and S-video types. It will

describe the video type the processor is using. The bitstream and speaker channel information is particularly

important with DVDs since they may or may not contain certain soundtracks. When you initially start the DVD

you may get a Dolby Digital (AC3) 2.0 soundtrack. To get the best possible sound, you may have to use the

DVD player's menu system to activate the Dolby Digital 5.1 or DTS-ES multi-channel soundtracks. The last

line will provide additional information about the surround or cinema mode processing currently in use. If

you need to call B&K regarding a problem with your preamplifier be sure to note the status display before

calling.

Current Bitstream and

sampling rate

Current video

source type

Current Source

DVD DTS 5.1 48K Composite

Surround 6 Variable EQ

DTS Surround + NEO:6

Current audio mode

and speaker selection

Current EQ selection

Current multi-channel bitstream type and/or

multi-channel surround matrix format

Note: Status display will scroll through each line of the display message on the front panel of the preamplifier.

The ENTER button will not trigger the OSD.

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OPERATION & CONTROL

The following tables represent a visual synopsis of how the front will respond depending on the audio mode,

number of speakers and the audio signal type. The first table shows how the front panel will display multi-

channel digital bitstreams. The second table shows how the front panel will display two channel audio types.

Digital Multi-Channel Bitstreams

Front Panel Display

# of Speakers

Used

MONO

Mono 1

Mono 2

Mono 3

STEREO

SURROUND

CINEMA

Mono 1

STEREO 2

STEREO 3

STEREO 2

DOLBY D 3

DTS SUR 3

DOLBY D 3

DTS SUR 3

DOLBY D 4

DTS SUR 4

DOLBY D 4

DTS SUR 4

4 Surrounds

4 Backs

Mono 4

Mono 4B

Mono 5

STEREO 4

STEREO 4B

STEREO 5

STEREO 5B

DOLBY D 4B

DTS SUR 4B

DOLBY D 4B

DTS SUR 4B

DOLBY D 5

DTS SUR 5

DOLBY D 5

DTS SUR 5

5 Surrounds

5 Backs

DOLBY D 5B

DTS SUR 5B

DOLBY D 5B

DTS SUR 5B

Mono 5B

DOLBY D EX

DOLBY D MU

DOLBY D MV

DTS ES DSC

DTS ES MTX

DOLBY D EX

DOLBY D MU

DOLBY D MV

DTS ES DSC

DTS ES MTX

Mono 6

Mono 7

STEREO 6

STEREO 7

DOLBY D MU

DOLBY D MV

DTS SUR MV

DTS SUR MU

DOLBY D MU

DOLBY D MV

DTS SUR MV

DTS SUR MU

Analog, PCM, AC3 2.0

Front Panel Display

# of Speakers

Used

MONO

Mono 1

Mono 2

STEREO

Mono 1

SURROUND

CINEMA

Mono 1

STEREO 2

Mono 1

STEREO 2

PL2X MV 3

PL2X MU 3

NEO6 MU 3

NEO6 MV 3

PL2X MV 3

PL2X MU 3

NEO6 MU 3

NEO6 MV 3

4 Surrounds

4 Backs

5 Surrounds

5 Backs

Mono 3

Mono 4

Mono 4B

Mono 5

Mono 5B

Mono 6

Mono 7

STEREO 3

STEREO 4

STEREO 4B

STEREO 5

STEREO 5B

STEREO 6

STEREO 7

PL2X MV 4

PL2X MU 4

NEO6 MU 4

NEO6 MV 4

PL2X MV 4

PL2X MU 4

NEO6 MU 4

NEO6 MV 4

PL2X MV 4B

PL2X MU 4B

NEO6 MU 4B

NEO6 MV 4B

PL2X MV 4B

PL2X MU 4B

NEO6 MU 4B

NEO6 MV 4B

PL2X MV 5

PL2X MU 5

NEO6 MU 5

NEO6 MV 5

PL2X MV 5

PL2X MU 5

NEO6 MU 5

NEO6 MV 5

PL2X MV 5B

PL2X MU 5B

NEO6 MU 5B

NEO6 MV 5B

PL2X MV 5B

PL2X MU 5B

NEO6 MU 5B

NEO6 MV 5B

PL2X MV 6

PL2X MU 6

NEO6 MU 6

NEO6 MV 6

PL2X MV 6

PL2X MU 6

NEO6 MU 6

NEO6 MV 6

PL2X MV 7

PL2X MU 7

NEO6 MU 7

NEO6 MV 7

PL2X MV 7

PL2X MU 7

NEO6 MU 7

NEO6 MV 7

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OPERATION & CONTROL

AUDIO MODES & SPEAKER SELECTIONS

B&K incorporates a state-of-the-art software and hardware system that will prioritize the incoming audio

signals (Plug n Play) and accordingly select the appropriate number of speakers, two-channel surround

decoder (Dolby Pro Logic IIx or DTS NEO:6) or multi-channel surround mode (Movie or Music) depending on

the user’s preference. Multi-channel encoded bitstreams (DTS and Dolby Digital) are automatically detected

and selected for any input. When a Dolby Digital or DTS multi-channel bitstream is detected, the number of

speakers in the speaker setup menu are selected automatically. Plug n Play will give priority to digital

bitstreams. If there is no multi-channel or two-channel digital bitstream present, Plug n Play will revert to the

analog audio (left and right) inputs using the default audio mode.

This preamplifier includes five audio listening modes; mono, stereo, surround, cinema and DVD-audio. Each

input (7 inputs) can be configured for each audio mode (4 audio modes), plus the DVD-Audio mode (see

page 29). The preamplifier will store user preferences for each audio mode resulting in a one touch solution

for recalling specific settings for various types of multi-media formats. For normal operation, the Setup Inputs

preferences should be configured for the “favorite” (default) setting for each input. Occasionally, you may

want to change the audio mode or speaker selection being used with an input. To quickly change the audio

mode simply select Mono, Stereo, Surround, Cinema or DVD Audio via the remote control or the front panel

Mode button. In addition, you may choose an audio listening mode immediately followed by a speaker selec-

tion. For example pressing STEREO-7 will select 7 speaker stereo mode. Pressing SURR - 5 will select 5

speaker surround. If you are listening to a 2-channel bitstream, you may change the surround decoder

(Dolby Pro Logic IIx or DTS Neo:6) and the operating mode of the surround decoder (Movie, Music, Game)

using the corresponding buttons on the remote. From the front panel use the MODE button to step through

surround modes and decoder types. Use the UP and DOWN arrows to select the desired number of

speakers.

Audio Mode Usages

MONO - The audio signals are summed or downmixed to produce a single mono channel which can then be

distributed evenly to the desired number of speakers. It is also useful in the case of a large listening group

when it is difficult to put everyone near the optimum listening position. To quickly recall the mono mode from

the remote control, press the MONO button then the number of desired speakers 0-9 (see table page 47).

From the front panel press the MODE button, then the up and down arrows to select the number of speakers.

STEREO - The unmodified Left and right audio signals are evenly distributed to the desired number of left

and right speakers. The center channel speaker receives a mono mix. Use this mode for true stereo listening

or for expanding the stereo image to additional speakers. To quickly recall the stereo mode from the remote

control, press the STER button then the number of desired speakers 0-9 (see table page 47). From the front

panel press the MODE button, then the up and down arrows to select the number of speakers.

SURROUND - This mode is used to extract multi-channel surround information from a 2-channel audio

source using one of the two available surround decoder types (DTS NEO:6 & Dolby Pro Logic IIx). To quickly

recall the surround mode from the remote control, press the SURR button then the number of desired

speakers 0-9 (see table page 47). To select surround from the front panel press the MODE button to scroll

through the audio modes, then the UP and DOWN arrows to select the number of speakers. Movie or music

mode have their own discrete IR command buttons for selection.

You have a choice of two methods for simulating multi-channel sound from a two channel source - Dolby Pro

Logic IIx and DTS Neo:6. These decoders use different formulas for creating the simulated multi-channel

soundfield. Each decoder type provides a MOVIE and a MUSIC mode. MOVIE places greater emphasis on

the back speakers and MUSIC places greater emphasis on the surrounds. Dolby Pro Logic IIx and DTS

provide an adjustable MUSIC mode. MUSIC mode adjustments are for the center image (width), surround

image (dimension), and front-to-surround image (panorama). Use the IMG+/-, DIM+/- and PAN+/- buttons on

the remote to adjust the various parameters for how the surround field is created. MOVIE mode is fixed and

has no adjustment options. Continued on next page...

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OPERATION & CONTROL

Material correctly mixed for Dolby Pro Logic contains no bass information in the surround channels and there-

fore, Dolby requires that no surround bass is mixed to the subwoofer when you have small surrounds.

However, many video game systems do end up with bass information in the surrounds. In order to prevent

loss of this bass information, PLIIx also provides GAME mode. GAME mode is otherwise identical to the

MOVIE mode. NEO:6 has no such requirements on surround bass - surround bass is allowed to be mixed to

the sub regardless of the mode selected. NEO:6 has no GAME mode.

The Surround mode is also used for multi-channel encoded bitstreams such as Dolby Digital and DTS-ES.

Selecting SURROUND-5 passes the 5 main channels unmodified to the fronts, center, and surround

speakers. Surround-6 engages Dolby Digital Surround EX or DTS Surround ES processing. Dolby Digital EX

must be selected manually. Both of these processes extract monophonic information from the surrounds and

places it in the back speaker(s). This is effective for material that has been mixed specifically for EX/ES, but

may drastically reduce surround information for material that is not specifically mixed for 6-channels. Dolby

provides a variation of Pro Logic IIx for processing surround and back channels for 5.1 material to make 7.1.

Press SURROUND-7 to access this mode. Back speakers will contain 2 independent channels (stereo

backs).

SURROUND-7 is the recommended mode for 5.1 material played back in seven channels. However, DTS

provides two variations for 6.1 material; DTS-ES Matrix (MTX) and DTS-ES Discrete. DTS-ES Matrix (MTX)

is specifically mixed to provide a single matrix surround back channel. The preamplifier will automatically

select SURROUND-6 for ES MTX material with the same surround back information in both back channels

(mono). DTS-ES Discrete (DSC) provides a completely independent discrete back channel. The preamplifier

will automatically select SURROUND 6 for ES DSC material.

Cinema Mode - CINEMA mode is identical to SURROUND mode except that it adds high-frequency roll off to

the front and center channels to compensate for certain movie soundtracks. In a movie theater the left,

center, and right front speakers are typically located behind the movie screen. The movie screen tends to

reduce the high frequency response. To compensate for this, movie soundtracks are mixed with boosted high

frequencies. Often, this compensation is not removed when transferring the movie to DVD. B&K provides

CINEMA mode to remove this undesirable high frequency boost. If a movie seems to have overly bright or

harsh sound, use CINEMA mode. CINEMA mode is otherwise identical to surround mode, providing all of the

same choices PLIIx, NEO:6, MOVIE, MUSIC, etc. However, CINEMA is not usually required for music

material.

DVD Audio (SACD) - Use this audio mode with the analog outputs of a DVD-Audio player or any other 5.1

analog audio source device. To quickly recall the DVD-Audio mode from the remote control, press the DVDA

button then the number of desired speakers 0-9 (see page 47). DVD-AUDIO - 5 is a direct analog pass-

through. No equalization is applied to the DVD Audio input.

Note: In order to select the DVD-Audio mode, the source input assigned to the DVD-Audio mode must be

selected before selecting the DVD-Audio mode. If no DVD Audio input is assigned (factory default), the DVD

Audio mode is inactive.

Why do I need all these audio modes?

With the wide variety of audio source material available today, i.e. 2 channel stereo, 2 channel surround and

multi-channel encoded audio, we believe that the reproduction of this material is best handled in audio

categories. We have decided to define five "audio modes" which are actually different Plug and Play modes

of operating our audio processor. Simply selecting an Audio Mode will automatically recall a plethora of user

designated settings associated with each mode. Those settings are then applied to the audio signal being

received. The Plug and Play system simplifies the process further by automatically detecting a bitstream and

selecting a maximum number of speakers, so the user doesn’t have to. Any of the five Audio Modes can be

designated as “default” per each input.

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OPERATION & CONTROL

Speaker Selections

The table below shows how your preamplifier will route audio information to the speaker channels depending

on audio modes and speaker selection combinations. Audio information will not be lost in any speaker selec-

tion. The information for the missing speakers is mixed to other active speakers. When selecting four or five

speakers, choose from the surround or back speakers. When the system setup is correctly performed, the

preamplifier will route audio to fewer small speakers with the needed corrections to volume and "down

mixing" applied automatically.

NOTE: The number provided on the left side of the table defines the speaker option that can be selected

immediately after an audio mode selection from the SR10.1 remote control. For example, pressing STEREO-

2 will select the front left and right speakers plus the subwoofer. Pressing SURROUND-7 will select the

surround mode using seven speakers plus the subwoofer.

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OPERATION & CONTROL

EQUALIZATION SETTINGS AND ADJUSTMENTS

The preamplifier provides 3 ways to modify the frequency response (equalization) for particular listening situa-

tions. These equalization are in addition to the room equalization and room resonance adjustments made in

the speaker setup menu. Pressing the EQ button consecutively on the remote control will step through the

preamplifier’s user EQ selections. To quickly select an EQ, press EQ, then the EQ number. Equalization is

not available for DVD-Audio, Direct, or LtRt Modes.

The available user EQ’s are defined as follows:

0 Flat - No equalization applied.

1 Variable - User designated EQ settings. To adjust the variable EQ

from the OSD, highlight the Variable EQ selection from the Z1 Operation

- Theater Zone Menu. Press the ENTER button to access and adjust

the variable EQ settings as shown. Bass and treble level adjustments

can be made using the LEFT and RIGHT arrows. Your preamplifier

allows the designation of the frequency at which the bass and treble

adjustments occur.

ZA OPERATION

Source DVD

Video DVD

Stereo 103.3

Volume -10.0

Mode Surround Center

DPLIIx Movie Rear

0.0

Spkrs

7 Sub

Eq 1 Variable

↑↓ next item adjust ←→

0..9 +10 recall preset SAVE

MENU main menu

LFE gain can be adjusted. Note that this affects only the separate LFE

(.1) track available on Dolby Digital and DTS material it has no effect on

the reproduction of normal bass from the front, center, or surround

channels.

VARIABLE EQUALIZATION

Frequency

Bass 100.0 Hz

Treble 10.0 kHz

LFE Level

Level

The dynamic range (Dolby Night-time mode) can be limited for late night

listening while processing Dolby Digital or DTS bitstreams.

0.0 dB

Normal

2 Loudness - The human ear's frequency response varies with volume

level. At high levels it has relatively flat response, while at low levels its

sensitivity to high and low frequencies are reduced. The loudness equal-

izer is designed to cancel the ear's frequency response anomalies to

provide consistent tone at all volume levels. Note that you will hear little

difference using the loudness control at high volumes as it has its greatest

effect at lower volume levels.

Dynamic Range

↑↓ next item adjust ←→

MENU zone operation

3 Vocal - Frequency gains have been cut on both the high and low end for vocals only listening. This is

useful for late night listening as it allows you to hear the dialogue, but reduces the volume of sound effects

which might disturb others. Unlike Dolby Digital/DTS nighttime modes, the vocal filter is effective for all source

material including PCM and analog.

This equalizer is also effective in reducing the vocal boominess often associated with FM talk radio. Some

crackly old movie soundtracks will have improved clarity with the vocal filter on.

The table below outlines how the various EQs can be applied in each audio mode. To manually select an

EQ, press the EQ button on the remote control followed by the EQ#.

Equalizer

Audio Mode

EQ Name EQ #

Mono

Stereo

Surround

Cinema

DVD Audio

Direct

No EQ

Off (Flat)

Variable

Loudness

Vocal

User set

bypassed

fixed response fixed response fixed response fixed response

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OPERATION & CONTROL

PRESETS

Saving a user preset is like taking a virtual picture of ALL USER settings in the preamplifier. This preset may

then be recalled at any time. Up to 40 presets may be saved in either the main theater zone or the second

zone. Presets provide a powerful method to recall favorite settings. Presets are easily recalled from the

SR10.1 remote control. The parameters that may be saved with a preset are:

Audio Source

Video Source

Audio Mode

Volume

Speaker Selection

Radio Station

User EQ

Center channel volume

Subwoofer volume

Rear channels volume

Record Loop

Preset titles can be customized according to the preset function. The following steps outline the procedure to

save a preset.

Quick Preset Outline - Set the unit exactly for the desired user settings. Press the SAVE button. Then select

the preset number you want to save it to. Press ENTER to save the settings. To recall a preset, press the

preset number, then ENTER.

Saving a Preset

The following steps detail the procedure that is used to setup and save a preset. The procedure references

the SR10.1 Remote Control that came with the Reference 50 Series 2 preamplifier.

Step 1

First, setup the preamplifier for the desired speaker selection, input, volume level and/or EQ. The Z1 or Z2

Operation Menu is helpful when setting up system parameters. It is accessed from the first page of the On

Screen Setup menu.

Step 2

From the SR10.1 remote, press the B&K button in the upper left corner of the remote screen. Then press

the PAGE button two times. In the lower left corner of Page 3, you will see the SAVE button. Press the

SAVE button one time. Pressing the SAVE button will activate the on screen display. The on screen display

will show the settings of the preset that is about to be saved. If a preset is saved from the front panel,

pressing ENTER and PRESET at the same time acts like the SAVE button.

OFF

MAIN

B&K

DVD

SAT

IMG- IMG+

DIM- DIM+

PAN- PAN+

MUSIC MOVIE

SAT

DVD

TAPE

SAVE

TAPE

PAGE 1

PAGE 3

MAIN

MUTE

VOL

GUIDE

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OPERATION & CONTROL

Step 3

Select the preset number. If you wish to save the preset to a particular number, you can directly select the

preset number from the number pad on the remote control. Use the +10 button to choose presets above the

number 10. For example: 12 is selected as +10 button then the number 2 button (+10 - 2).

Use the left and right arrows from the thumb pad to select the preset number to save. If a preset number is

not chosen, the preset will saved to the next un-used favorite preset number.

EXIT

+10

ENT

+10

ENT

B&K SYSTEM REMOTE

SR10.1

B&K SYSTEM REMOTE

SR10.1

Step 4

EXIT

Press the ENTER button or the center of the thumb pad

when you are satisfied with the preset settings. Once the

ENTER button is pressed, SAVING SETTINGS will be

displayed.

+10

ENT

B&K SYSTEM REMOTE

SR10.1

Step 5

Once the settings have been saved, the preset can be named or re-

named with a custom title. If Preset Auto Naming is ON, then the

processor will automatically assign a generic name to the preset (see

page 30). Use the thump pad UP or DOWN to change the blinking

character. Use left/right to move to a different character. Press ENTER

again to save the name. From the front panel use UP or DOWN

buttons to change the character and the volume knob to mode to a

different character.

SAVE PRESET 1 DVD SUR

DVD -56 dB

New Name V1 -56

Source DVD Record DVD

Video DVD Volume -56.0

Mode Surround Center 0.0

PLIIx Movie Rear

Spkrs 7 Sub

EQ 1 Variable

0.0

To save the preset name from the front panel, press the PRESET and

ENTER buttons simultaneously to save preset settings. The PRESET

and ENTER buttons operate the same as the SAVE button would from

the remote.

0..9 +10 preset preset

ENT save preset cancel menu

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OPERATION & CONTROL

Recalling a Preset

To recall a preset from the SR10.1 remote control, press the preset number, then the ENTER button. For

example, to recall preset number 2, press 2 - ENTER. Three steps are necessary in the case of a preset

above the number 10, (preset 12 = +10 - 2 - ENTER).

To recall a preset from the front panel, press the PRESET button to scroll through the saved favorite presets.

Once the desired preset is found, press the ENTER button to recall the preset.

If a preset is recalled in zone two, then the zone code for Zone B (002 default) must used to recall the preset.

Favorite Presets

The preamplifier saves a list of favorite presets which can be quickly accessed using the channel up/down

button on the remote, or the PRESET button on the front panel. The preamplifier can be setup to recall the

chosen favorites instantly or only after an ENTER command. When a preset is saved it is automatically

added to the favorites list. The list can be edited in the favorites menu (page 30). If there are no favorites in

the list, then CHANNEL or PRESET will step through all 40 presets.

SR10.1 REMOTE EDITOR SOFTWARE

The SR10.1 is supplied with a CD-ROM containing the setup program. This software can also be obtained

from the B&K website. After SR10.1 editor program has been installed, be sure to do a LIVE UPDATE.

The live update is found under Help ->Live Update. A live update ensures that you have the latest version of

setup software. Your PC will need to be connected to the internet to execute the update. The editor software

can be used to program your SR10.1 to control other source devices your system may contain. The SR10.1

can be programmed to control devices such as DVD players, CD players, music servers, satellite set top

boxes, TVs, and more. You can customize particular devices so frequently used commands are readily

accessible.

The following pages summarize some key points of

SR10.1 Editor

the programming software. The full version of the

programming manual is found under Help -> User

Guide or go to www.bkcomp.com.

The SR10.1 comes pre-programmed with 10

devices. Each device is pre-programmed on the

Main Page 1 of the SR10.1. Each device button is

labeled to match the inputs on the back panel of the

preamplifier. Pressing a device button will change

the input on the preamplifier. Once a device button

is pressed, the remote will automatically flip to page

one to display device functions. Page one of the

device can contain specific commands to control the

source component. For example, pressing DVD will

change the preamplifier to the DVD input and then

show the controls for the DVD player.

The editor software can also be used to program

macros to further simplify the operation of your

system. A macro is a series of recorded IR steps

that can be executed with one button press. A

simple macro might execute a preset recall, a more

complex macro can be setup to turn ON all source

devices or turn OFF all source devices.

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SOFTWARE SETUP

Blank - A button with no flag will not do anything when pressed. It is empty and has no programming.

IR Command - A red dot indicates that the button is programmed with an IR database command. An

IR database command can be pressed or pressed and held for a scrollable command (such as

volume). All buttons except the MAIN and FAV devices can be programmed with IR database codes

(you cannot program the navigation buttons-PAGE, MAIN or FAV either). To program IR database

commands, goto PROGRAM -> IR DATABASE. Program IR devices according to make and model.

Shortcut - A black arrow on yellow square indicates that the button is programmed with a shortcut. A

shortcut is a pointer to a IR database command. A shortcut can be made to various commands within

any device. To make a shortcut, choose the button on the virtual remote, then click the DEVICE drop

down in the Edit and Label buttons window and select the device to shortcut to. Click the IR CODE

drop down. The drop down displays the list of commands within a device. Once you select the

command you want to shortcut to, click SAVE. The diagram below illustrates putting the B&K

command for the NEO:6 decoder in the DVD device as a shortcut.

Creating a Shortcut

Punch Through - A PT flag indicates that the

button is programmed to “Punch Through” to

another device. Punch throughs are used for

programming multiple devices for volume,

channel, numbers, play stop and pause.

Punch throughs can eliminate the need to

navigate the remote control for simple

functions such as volume. The Punch through

window is a fast way to assign multiple Punch

throughs quickly.

To set up a punch through, goto PROGRAM ->

PUNCH THROUGH. The ‘Punch To’ column

defines the devices that will have control from

a different device assigned to certain buttons

within the device. In the ‘Punch From’ column, select the device from where the IR codes will source

from. For example, devices such as DVD players do not usually control volume, the punch through for

volume will Punch From B&K for the DVD device . This way, the B&K volume will be controlled when

the DVD is selected.

Once the punch throughs are set, click SAVE.

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SOFTWARE SETUP

Macro - An ‘M’ or ‘F’ flag indicates that the button is programmed with a Macro (the F flag indicates

the Macro is on one of the Favorites pages). Only the LCD buttons and the Power ON and Power OFF

buttons can be programmed with MACROS. Hard buttons cannot be programmed with MACROS

directly. A macro with a single step cannot be pressed and held for a sustained burst. In order to

make a macro, you must make a recording of the steps you

want to execute. To start a macro recording, click

the RECORD icon in the Macro & Favorite window. Once the

macro has begun recording, navigate through virtual keypad

within the software and find the command(s) you wish to

execute with the macro. Once the macro is complete, click the

SAVE icon located right next to the Record icon. The macro in

this example shows how a power-on macro can also recall a

preset, in this case preset one. There are three steps involved

in order to turn power on and recall a preset: The button press for power on, the button press for the

preset number and the button press for ENTER. See Presets, page 49.

Learning IR Codes

Learned - An L flag indicates that the button is programmed with a learned IR code. A learned code

can be pressed or pressed and held for a sustained burst. All buttons can be programmed with

learned codes (including all MAIN buttons, hard and LCD) except the buttons on FAV pages and the

navigation buttons themselves.

To program a learned command, the PC must be connected to the remote control with the supplied

programming cable. Once the cable is connected, click the learn icon located in the Edit and label

buttons window. ‘Learning Ready’ will appear in the lower portion of the window. Then point the

source remote at the head end of the SR10.1. Press and hold the original IR command button until

you see ‘GOOD’ appear in the lower portion of the Edit and Label Buttons window. Click SAVE to

complete and confirm the learning process.

e t

y n p a

e m R l o o o C h t W i

o C e T c i h F H i

OFF

A + S T

S -

A - S T

T U N E +

T U N E -

F M

V I D E O

V +

B -

T -

S O U R C E B A S S

T R E B L E S T / M

T +

S +

B +

A M

L O U D N E S S

E N T E R

+ 1 0

L O U D

To PC

T E D

D E D I C A

D - I N

I N

Z O N E

E X I T

MAIN

D O W N

T T

R E E N T E R F F

S E L

E E

L L

MUTE

VOL

U P

GUIDE

INFO

M E N U

V E S A

M U T E

O F F

P R E S E T V O L U M E

EXIT

O N / O F F

P O W E R

I N

B & K

O N

I N

+10

ENT

B&K SYSTEM REMOTE

SR10.1

OFF

To PC

MAIN

MUTE

VOL

GUIDE

INFO

EXIT

+10

ENT

B&K SYSTEM REMOTE

SR10.1

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SOFTWARE SETUP

BKcSuite SETUP software

BKcSuite setup software can be downloaded from the B&K website at www.bkcomp.com.

Instructions for installation are provided online. Once the software has been installed, download and

install the appropriate user manuals separately. BKcSuite automatically installs a shortcut icon on

the desktop [BKTask icon (grey)]. Make sure all other applications which use the serial port are

closed before opening the taskbar. BKcSuite has the capability to connect in real-time (live) to any of

B&K’s receivers or preamplifiers. However, it is recommended that all setup be done virtually (not live) to

avoid system errors. Once the setup files have been created, establish a connection to the unit and open the

saved files. Typical PC setup should follow the described procedure:

1. Open BKcSuite A/V Setup from BKTask. DO NOT CONNECT

UNIT TO COMPUTER. Without a connection to the preamplifier is

considered virtual mode.

2. When BKcSuite is first opened, the Device Investigator automat-

ically scans to find a connected B&K product. After you have

created your setup files, this is how you can establish a connection

to the unit. First, choose “select product for operation without a

connected device.”

Click

Here!

3. Choose the product you wish

to work with.

4. The first screen that will appear is a blank grey screen with a toolbar at the top. To access the system

setup menu, click the Advanced System Setup icon.

5. The BKcSuite will open directly to the Preset Editor page. You can edit and save preset using this

menu. If you desire to setup system parameters, click SYSTEM tab located at the bottom of the page.

The system setup outlines the features available in the On Screen Menu.

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SOFTWARE SETUP

6. Once you have configured the settings for your system, save the BKcSuite file. Goto File->Save

settings To File. Both the system settings and presets for zone A and zone B will be saved together in

one file (.bkd extension). Once the settings have been saved to file, you are ready to establish a live

connection to the preamplifier.

OUTPUTS

A/V SOURCE OUTPUTS

ZB/V2 V1 TAPE

A/V SOURCE INPUTS

CD DVD TV

COMPONENT VIDEO

IN IN

COAX S/PDIF DIGITAL

OPTICAL S/PDIF DIGITAL

ZA OUT

ZONE

TAPE

SAT

OUTPUT

OUT

SAT

DVD

7. Connect a straight through CAT5 network cable between the RJ-45

jack and the serial port of the PC (pictured at left). If the PC does not

have a DB-9 type serial port, a serial to USB adapter can be used. To

SUB

CENTER

SUB

CENTER

Audio/Video Systems Hand-Made in the U.S.A

ET R

ZB OUT

SAT

DVD

CONTROL OUT

IR INPUT

ZONE

12VDC

50 mA

RS-232

PORT

IEEE

1394

EXPANSION

IR INPUT

ZONE

SURRND FRONT SURRND FRONT

BACK ZONE

ANTENNA

www.bkcomp.com

RIGHT

SURROUND BACK SURROUND

RIGHT RIGHT

FRONT

RIGHT

FRONT

LEFT

SURROUND SURROUND BACK

SUBWOOFER

CENTER

LEFT

RIGHT

LEFT

DVD

CAUTION

RISK OF ELECTRIC

SHOCK DO NOT OPEN

FUSE

(

)

(

)

BALANCED SURROUND OUTPUTS

BALANCED LINE INPUTS

establish a live connection, close and

(

)

(

)

USB to Serial adapter

re-open BKcSuite. BKcSuite will search

all com ports for a connected device.

While a live connection is established,

BKcSuite will operate the same way as

when in virtual mode, however any

changes made in BKcSuite will immedi-

ately update inside the unit itself. To

upload a saved file, goto File->Open

and open the saved system setting file

while a live connection is established.

CAT5 Network Cable

Troubleshooting Guide For BKcSuite

PC requirements - 128MB RAM, Pentium grade or better processor, Windows 98SE operating system or

greater. (Exception- BKcSuite not supported on Windows NT) ***

Make sure the CT/CK/SR product is connected to the PC’s serial port. (DB-9, nine pin or USB)

Be sure to select “Local Com” in the BKcSuite software, as “Network” is not currently supported.

If the unit will not communicate through RS-232, perform a factory reset. (See Factory Reset Section)

Know how to properly set the COM port protocol in your version of Windows:

Window 9x/Me - Go to your system’s “Control Panel.” Double click the icon labeled “System.” Click

the Device Manager button. Scroll down until the section labeled “Ports.” Click the small “+” located next to

“Ports” to expand the tree and view the installed communication ports. Double click the COM port that corre-

sponds to the port on the PC that the CT/CK/SR product will be physically connected to. Locate the tab in

the Window labeled “Port Settings,” click it and go to section 6 below.

Windows 2000/XP - Go to your system’s “Control Panel.” Click the icon labeled “System.” In the

Hardware tab, click the Device Manager button. Double click on the icon labeled “Ports” to expand the tree

and view the installed communication ports. Double click the COM port corresponding to the port the

CT/CK/SR product is physically connected to and go to section 6 below.

Set the proper communication properties. The parameters for Port Settings should be entered as

follows:

Bits per second

Data Bits

Parity

- 9600

- 8

- None

- 1

- None

Stop Bits

Flow Control

In the advanced section of the Communication properties window is the “FIFO Buffer” configuration. Most

modern laptops have the ability to take full advantage of these buffers, so it is recommended to enable them

and drag their slider to the “max” setting. Once you have finished making the selections, click “OK” to all

windows and prompt to return to the Control Panel. At that point you can close the Control Panel.

Disable any and all power management services including any Uninterrupted Power Supplies (UPS).

Disable any handheld computer / PDA syncing software and services.

Disable any other RS-232 / Serial protocol programs that may be using a COM port. i.e CK1.2 Keypad

Editor, SR10.1 Remote Editor or serial controller.

10. In case you encounter an “Out of Memory” or “Out of Resources” error, be sure your PC meets the

minimum requirements outlined in the BKcSuite section of this manual. Close all unnecessary programs that

may be running. It is recommended to let Windows manage your virtual memory, however, if you manually

set the virtual memory size, set it at least to 1.5 times your actual RAM size.

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TROUBLESHOOTING

PROBLEM

POSSIBLE CAUSE

POSSIBLE SOLUTION

No sound

Display will not

illuminate.

1. Power cord not plugged in.

2. Power off at AC source.

3. AC power inlet fuse blown or

faulty.

1. Reconnect power cord.

2. Check AC switch or fuse.

3. Check AC line fuse, replace line fuse with

.5A 250V Fast Blow fuse.

4. Power switch in off position (out). 4. Push in the main power switch.

No sound

Unit display will

illuminate.

1. Preamplifier is in mute.

2. Volume control to a minimum.

3. Un-used source selected.

1. Un-mute the preamplifier .

2. Turn up volume.

3. Select an active source.

4. Line stage or source not correctly 4. Check ALL connections. Try substituting

cables.

connected.

5. Speaker fuse blown.

5. Check all speaker fuses and replace if blown.

Replace fuse with same type and value.

Loud hum or buzz on 1. Poor ground connection in the

one or more channels. interconnect cables.

1. Check all connections making sure that

cables are connected (+) to (+) and (-) to (-).

Channel sounds “bad.” 2. Poor AC ground in main AC supply 2. Check all cables and repair where necessary.

3. Audio cables installed across AC 3. Reposition cables, bundle like cables

power.

together.

4. Try substituting cables.

Remote / Keypad / IR

sensor(s) will not work. wrong.

2. IR lock is enabled

1. Batteries dead, missing, installed 1. Check and replace batteries.

2. Unlock IR sensor, see Advanced Security

menu.

3. IR inference.

4. Using the wrong IR code-set.

5. Wires are crossed

3. Check for nearby sunlight, plasma TV’s or

fluorescent light. Block where needed.

4. Check zone assigned IR code-set.

5. Check wiring diagram on page 21.

Surround speakers are 1. Normal operation.

not very loud in

SURROUND mode.

1. When in SURROUND Mode, most audio

information is directed to the center channel.

Surround and back channels are used for

“effects” scenes.

2. Speaker channels may not be

turned on.

2. Check speaker setup page 25.

Unit is locked

1. Poor power supply

2. Processor lockup

1. Check AC power.

2. Cold boot (power switch) or reset the unit.

No component video

1. Component video input is not

assigned.

1. Assign the component video to the appro-

priate source input.

S-Video and Composite 1. DVD player set to progressive

video not visible when

using DVD player.

1. Progressive scan (480p) can only be viewed

using component video.

2. Reset DVD player to interlaced (480i).

scan.

Preamplifier is not

recognizing multi-

channel bitstreams.

1. DVD player needs to be config-

ured for digital output.

1. Go into the DVD players setup menu and

turn on the appropriate digital output.

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BACK PANEL PICTURE

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ON SCREEN MENU FLOW CHART

Reference 50 Series 2

Menu System

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ON SCREEN MENU FLOW CHART

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NOTES

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NOTES

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SPECIFICATIONS

Reference 50 Series 2 Preamplifier Processor

Specification

Reference 50 Series 2

Preamplifier Surround Outputs

Surround Sound Processing

7.1 RCA Type

7.1 Balanced (XLR)

Dolby Digital / Dolby Pro Logic IIx / Dolby Digital Surround-EX

DTS / DTS-ES Discrete / NEO:6

Frequency Response

Processor Type

5 - 45kHz

Motorola 371 (180 MIPS)

Input Sensitivity

90 mV

Signal to Noise Ratio

Input Impedance

89 dB

50 K Ω

Output Impedance

221 Ω

Maximum Output Level

User Presets

Audio / Video Source Inputs

Balanced (XLR) Source Inputs

Digital Audio Inputs

CK1.2 Keypad Compatible

DVD-Audio Inputs

5 Optical / 6 Coaxial

Yes

5.1 (assignable)

Tape Record Loop Outputs

RS-232 Controllable

Number of zones

3 Analog / 3 Digital (2 Coax - 1 Optical)

Yes

AC Line Voltage

120 / 220 / 240 VAC (optional / switchable)

Control Outputs

Four 10 - 12VDC triggers @ 50mA

17.00 (17.12)

5.75 (7.87)

Dimensions in Inches

(Cutout Dimensions)

Width

Height

Depth

13.5 (14.62)

Shipping Weight

20 lbs

Power Consumption

30 watts max

Replacement Fuses

AC Line - .5 Amp / 250 Volt Fast Blow

Video Specifications

Tuner Specifications

Spec

FM Section

AM Section

Freq. Response Composite / S-Video 20 Hz - 10 MHz

Frequency Range

87.5 - 107.9 MHz 520 - 1670 kHz

Less than 0.25% Less than .3%

Freq. Response Component Video

Input & Output Impedance

10 Hz - 100 MHz

75 Ω

Total Harmonic Distortion

Frequency Response

IHF (Usable) Sensitivity

Alternate Chan. Selectivity

Signal to Noise Ratio

Antenna Input Impedance

Mono/Stereo Sensitivity

Capture Ratio

20 Hz - 15 kHz

12 dBf

300 - 3 kHz

28 dBf

30 dB

50 dB

300 Ω

N/A

Composite & S-Vid Inputs / Outputs

Component Video Inputs / Outputs

Max. Input / Output Level (RCA & S)

7 / 5

3 / 1

65 dB

2 V P-P

70 dB

75 Ω

15 / 35 dBf

2 dB

N/A

Reference 50_S2_UM_13790.pdf

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