Meridian DSP33 Digital Loudspeaker System
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Meridian DSP33 Digital
Loudspeaker System
User Guide
i
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Sales and service in the UK
Meridian Audio Ltd
Stonehill
Sales and service in the USA
Stukeley Meadows
Cambs
PE18 6ED
Meridian America Inc
3800 Camp Creek Parkway
Building 2400
Designed and
manufactured in the UK by
England
Tel (01480) 52144
Suite 122
Fax (01480) 459934
Atlanta
Digital Gramophone and Wireless Ltd
GA 30331
Stonehill
Stukeley Meadows
Cambs
World Wide Web
Tel (404) 344 7111
Fax (404) 346 7111
PE18 6ED
Part no: DSP33
England
Copyright © 1999 Digital Gramophone and MHR: This product incorporates copyright
Reverse engineering or circumvention of
this protection is strictly prohibited.
Wireless Ltd.
protection technology covered by certain
patent applications and intellectual
property of Meridian Audio Ltd. This
technology is provided for the express
purpose of securely containing copyright
audio within the Meridian System only.
Boothroyd|Stuart Meridian, Meridian,
Meridian Digital Theatre, Meridian
Lossless Packing, MHR, and MLP are
registered trademarks of Meridian
Audio Ltd.
This guide was produced by
Human-Computer Interface Ltd,
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Contents
Introduction
1
Setting up the DSP33
Digital Loudspeaker
System
Introduces the DSP33 Digital Loudspeaker
System, and gives guidelines and
suggested layouts to help you plan your
surround system.
9
Describes how to unpack and install the
digital loudspeakers and explains how to
connect them to your equipment.
Using the DSP Digital
Loudspeaker System 19
The DSP33 Digital Loudspeaker
System ...................................................
Sample configurations ...........................
Specification and accessories ...............
2
5
7
Unpacking .............................................. 10
Positioning the digital loudspeakers ...... 11
Connecting the loudspeakers ................ 13
Connecting the digital loudspeakers ..... 15
Provides step-by-step instructions for
operating the digital loudspeakers in
compact systems with no other
preamplifier or control unit.
Selecting a source ................................. 20
Adjusting the volume ............................. 21
Adjusting the balance or phase ............. 22
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Configuring the DSP33
loudspeakers using a
computer
23
Describes how to configure the digital
loudspeakers using the Meridian
Configuration program.
Troubleshooting
35
Provides suggested solutions to typical
problems.
The Meridian Configuration program ..... 24
Running the Meridian Configuration
program ................................................. 25
Creating a new settings file.................... 27
Changing the setup options................... 29
Setting up sources ................................. 31
Completing the configuration ................ 34
Troubleshooting ..................................... 36
Service and guarantee ........................... 39
Index ...................................................... 41
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Introduction
The Meridian DSP33 Digital Loudspeaker System combines the latest
acoustic and drive unit technology with multiple built-in power amplifiers
and advanced high precision digital signal processing. The result is a
speaker that produces extremely high-quality sound from a compact
enclosure, and is ideal either as part of a stereo system or a full home
theatre.
For instructions on setting up the loudspeakers turn to the next chapter,
Setting up the DSP33 Digital Loudspeaker System. Once they have been
set up refer to Using DSP33 Digital Loudspeaker System, page 19, for
information about getting the best results from all your music and film
recordings.
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The DSP33 Digital Loudspeaker System
The DSP33 Digital Loudspeaker System incorporates the result
of several years of research and development into innovative
technologies.
❍ To perform filtering or adjustment of the frequency response;
eg treble or bass.
❍ To provide volume control to 48-bit precision.
❍ To provide bass extension by boosting the bass at moderate
levels to take full advantage of the capabilities of the drive
units.
Digital Signal Processing
Digital Signal Processing, or DSP, is a technique pioneered by
Meridian in hi-fi products for achieving extremely accurate
reproduction of audio signals using high-precision mathematical
processing.
If you are using the DSP33 Digital Loudspeaker System with a
digital source, such as CD or DVD, the signals remain in digital
form until the last possible stage.
DSP allows sophisticated processing to be performed without
any of the cumulative noise or degradation that inevitably
occurs, even with high-quality analogue circuitry. In addition, the
signal improvement techniques incorporated in the DSP33
would be virtually impossible to implement in analogue circuitry.
DSP33 drivers
Each DSP33 loudspeaker uses two parallel 125mm (5") bass
drive units. These incorporate a cast alloy chassis and a carbon
fibre cone, and have a very large magnet which provides
excellent drive and control. Combined with the Meridian’s active
bass extension technology, they provide surprisingly rich, deep
bass, quite unprecedented for this size of cabinet.
The DSP33 takes advantage of DSP for several different
functions:
❍ To remove timing variations from the incoming digital signals
(de-jittering).
The treble unit is a very high quality 25mm (1") aluminium dome
with a Neodymium magnet and a protective grille. It is extremely
well matched to the woofer, and also tonally very compatible
with the other speakers in the Meridian range.
❍ To split the frequency band between the treble and bass
drivers (crossover).
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Power amplifiers
Mounting options
The speakers are driven by two high-power low-feedback power
amplifiers. The combination of idealised magnetic design,
careful star earthing, and very fast output devices give the
amplifiers extremely low noise, high detail, and fast bass.
The DSP33 is designed to be used either vertically or
horizontally mounted and uses fully shielded drive units so that it
can be placed above or below a television without interference.
If ordered as a centre it is supplied with a plinth, which can be
used to give rigid support and tilt the centre channel towards the
listener.
The whole electronic assembly is supplied from a substantial
torroidal transformer feeding high-quality audiophile-grade
capacitors.
Meridian High Resolution (MHR)
Cabinet
The DSP33 Digital Loudspeaker System supports Meridian High
Resolution (MHR), to allow you to connect to other MHR-
compliant Meridian products to take advantage of high-rate
audio sources, and provide the additional benefits of lower jitter
and improved sound quality on all sources.
Each DSP33 loudspeaker is built around a precision
manufactured aluminium cabinet. The rigidity of this material,
combined with the built-in structural elements, gives incredibly
low levels of cabinet resonance, which is further reduced by
additional damping. This results in a cabinet of exceptionally low
colouration, giving the loudspeaker amazing mid-range
transparency.
MHR is a proprietary secure encoding format that uses
encryption and anti-copy methods to provide a secure copyright
protection environment, and allow the secure transfer of audio
streams within a Meridian-only system for playback only.
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Meridian Comms
The DSP33 Digital Loudspeaker System is part of the Meridian
family of advanced digital, analogue, and video components,
and these incorporate a sophisticated communications link, to
allow you to control any combination of units using a single
remote, and ensure that they will work together as a fully
integrated system.
The communications system also allows you to extend your hi-fi
system into two or three rooms, with the ability to control the
sources in one room from the controller in another room.
The following pages show two recommended configurations
based on the DSP33 Digital Loudspeaker System to illustrate
the flexibility of Meridian components.
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Sample configurations
Meridian Digital Compact Theatre™
DSP33 rear
DSP33 rear
DSP33
D1500
DSP33
DSP33
Meridian DVD Player
Meridian Surround Processor
Five DSP33 loudspeakers can be used in conjunction with a
Meridian Surround Processor to create a compact surround
system with superb music and cinema sound.
The DSP33 provides an unusually good response for such a
compact case, and can be mounted either horizontally or
vertically for total flexibility.
A Meridian D1500 Digital Subwoofer can be added for extended
bass performance.
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DSP33 Digital Loudspeaker System
Other applications
Other applications include:
DSP33
DSP33
❍ High-quality multimedia PC speakers with RS232 control of
volume etc.
❍ Surround speaker in a Meridian Digital Theatre (extra S5 lead
required).
❍ Main speaker in a Digital Music System with a Meridian CD
Player (512 and D5 lead required).
❍ Main speakers with another source of digital audio; eg satellite
(512, D5 lead and MSR required).
Meridian DVD Player
512
❍ Second zone speaker in a Meridian two-room plus system
(long M5 lead, 512, D5 lead, and MSR required).
The DSP33 can be connected directly to almost any source that
provides a PCM SPDIF output, including CD or DVD players,
some PC soundcards, and digital satellite decoders. The DSP33
includes a DSP volume control, and with Meridian sources this
operates seamlessly via the 500 comms system.
These applications may require additional accessories; for more
information see Available accessories, page 8.
Alternatively, the volume can be controlled with the Meridian
System Remote using the optional 512 Remote Eye, or via the
RS232 interface using the optional RS232 lead.
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Specification and accessories
Specification
Frequency response In room response within 3dB, 60Hz-
20kHz, lower at moderate volumes.
Digital inputs
2 x cable, 75Ω, IEC958, 32-96kHz. FIFO
locks at 44.1, 48, 88.2, or 96kHz ±
150ppm.
Crossover
Drive units
Linear-phase ±30º at 2.3kHz.
Woofers: 2 x 125mm (5") carbon fibre
custom drivers, cast alloy chassis.
1 x digital output cable, 75Ω, IEC958,
providing a copy of the selected input.
Tweeter: 1 x 25mm (1") aluminium dome
neodymium magnet, with protective grille.
Processing
1 x Motorola 56364 running at 100MHz.
Control
2 x Meridian Comms.
Power amplifiers
Low feedback complementary bipolar
design, with output-stage error
correction and twin loop design.
9-pin D connector for RS232 PC setup
and control, null modem, 9600 baud,
2N1, no handshake.
Treble: 50W RMS.
Bass: 85W RMS.
24-bit Delta-Sigma.
Cabinet
Extruded and cast aluminium with
bracing elements.
Digital to analogue
conversion
Dimensions
150mm x 395mm x 210mm
(5.9" x 15.6" x 8.3") (W x H x D).
Distortion
Typically <0.01%, or <0.05% up
to full power at all frequencies.
Weight
Power
9.5kg (21lb) each.
Noise and hum
Acoustic output
Acoustic noise
<-95dBr at all volume settings.
Typically >104dB spl @ 1m.
<15dB spl @ 1m.
100-125; 200-250V AC 50-60Hz.
6VA idle; 200VA max.
Meridian Audio reserves the right to amend product
specifications at any time.
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Available accessories
The DSP33 is shipped ready to be used as the front speakers in
a small Meridian Digital Theatre with a Meridian DVD Player
(such as the 800 or 580) or a Meridian Digital Surround
Controller (such as the 861, 568, or 561).
Other applications, and some advanced features, may require
one or more of the following accessories, which can be
purchased from your Meridian dealer.
❍ Meridian System Remote.
❍ 512 Remote Eye for remote control reception.
❍ D5 lead for connecting between the 512 and DSP33.
❍ Additional S5 leads (8m and 14m).
❍ 511 S-patch box if connecting more than two DSP33s to a
561 Digital Surround Controller or 568 Digital Surround
Processor.
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Setting up the DSP33
Digital Loudspeaker
System
This chapter explains how to install the DSP33 Digital Loudspeaker
System. It describes what you should find when you unpack the speakers,
how you should connect them to your other audio equipment, and the
siting constraints.
Before you begin installation you should ensure that your digital
loudspeaker system is the correct voltage for your local AC supply. If it is
not, do not try to install the unit, and contact your dealer.
You should not make any connections to the digital loudspeakers, or to
any other component in your system, while the AC power supply is
connected and switched on.
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Unpacking
The digital loudspeaker system is supplied in a box containing
the following components:
Radio interference
FCC Warning: This equipment generates and can radiate radio
frequency energy and if not installed and used correctly in
accordance with our instructions may cause interference to
radio communications or radio and television reception. It has
been type-tested and complies with the limits set out in Subpart
J, Part 15 of FCC rules for a Class B computing device. These
limits are intended to provide reasonable protection against
such interference in home installations.
❍ DSP33 Loudspeaker(s) complete with grille.
❍ Four self-adhesive feet per speaker.
❍ This user guide.
❍ Power cord suitable for your territory per speaker.
❍ Meridian M5 lead.
❍ Meridian S5 lead.
❍ Meridian Configuration program.
❍ RS232 cable.
❍ R reset plug (see page 13).
EEC: This product has been designed and type-tested to
❍ Centre channel plinth (if ordered as a centre channel).
comply with the limits set out in EN55013 and EN55020.
If any of these items is missing, please contact your dealer. We
suggest that you retain the packaging carefully, as it provides
maximum protection in transit.
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Positioning the digital loudspeakers
Safety warnings
To position the digital loudspeakers
❍ Do not expose the speakers to dripping or splashing.
❍ Do not place any object filled with liquid, such as a vase, on
the speakers.
The DSP33 loudspeakers can be used either horizontally or
vertically. If the DSP33 is mounted on a bookshelf, or mounted
horizontally on top of a television, the feet should be attached as
shown below. The best sound will only be obtained if the DSP33
is firmly mounted, and does not rock when pushed.
❍ Do not place naked flame sources, such as lighted candles,
on the speakers.
To avoid overheating
Do not position the speakers:
❍ In direct sunlight.
❍ Near heat sources, such as a radiator.
❍ Directly on top of heat producing equipment, such as a power
amplifier.
The DSP33 cabinet acts as a heatsink and requires adequate
ventilation. Ensure that air can flow around it.
To avoid interference
Do not position the speakers:
❍ Near strong magnetic radiation, such as near a power amplifier.
11
Vertical
Horizontal
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To obtain the best sound
To wall mount the digital
loudspeakers
For best results adjust the position of the loudspeakers while
listening to music.
The DSP33 has been designed to be secured with an
OmniMount 75 Series wall bracket, details of which may be
obtained from OmniMount Systems, USA (818-766-9000). The
mounting bolts are shown on the back panel. These are M6
Allen Bolts. Do not use any other bolt for the OmniMount
bracket. Please follow the instructions for fitting provided with
the bracket. It is entirely the responsibility of the installer to
ensure that the DSP33 is securely fastened.
If possible, have the most acoustically absorbent wall in the
room behind the front speakers. Ideally have each DSP33 at
least 0.5m (20") from a corner.
If the speakers are mounted on stands, position them
approximately 0.25m (12") from the wall.
If you are using the speaker as a centre channel, place the
speaker centrally between the main left-right pair and, if
possible, arrange for the tweeters of the three speakers to be
approximately the same height. The plinth allows the centre
channel to tilt towards the listener for optimum imaging.
No other bolts should be undone on the rear panel.
Caution: The DSP33 is heavy for its size.
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Connecting the loudspeakers
Back panel
The following diagram gives details of the rear panel
connections:
DIGITAL
INPUT OUTPUT
MERIDIAN COMMS
OUTPUT INPUT
RS232
1
2
Digital Digital
inputs output
Channel
selection
Connections
Comms
PC
CHANNEL
LEFT/
CENTRE
RIGHT
DIGITAL
INPUT OUTPUT
MERIDIAN COMMS
RS232
OUTPUT
INPUT
1
2
CHANNEL
LEFT/
CENTRE
Omnimount
wall bracket
fixing holes
RIGHT
To reset the configuration of the
digital loudspeaker
OFF
ON
Power input
Fuse
The following procedure can be used to reset the configuration
of the DSP33 loudspeaker to the default settings, without
needing a computer, using the R reset plug supplied.
● Unplug the COMMS connections.
● Plug the R reset plug into the COMMS input socket.
● Switch the loudspeaker off, and then on again.
● Replace the original COMMS connection.
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Digital connections
Communications connections
The following table gives details of the digital audio inputs:
The following table gives details of the communications
connections:
Use this input
To connect to this
Use this connection
To connect to this
DIGITAL INPUT 1,
DIGITAL INPUT 2
A digital source, such as a digital
preamplifier, digital control unit, CD
player or DVD player.
COMMS INPUT
The COMMS connection on a
Meridian control unit or
preamplifier.
DIGITAL OUTPUT
A second (slave) DSP loudspeaker,
using an S5 lead.
COMMS OUTPUT
RS232
The COMMS INPUT on a second
DSP loudspeaker.
The digital connections should be made with high-quality 75Ω
screened cable. Suitable cables are available from Meridian. We
do not recommend using audio cables, which do not have
adequate shielding or the correct impedance, or cables intended
for UHF applications, as these do not provide adequate
shielding in the 1–30MHz region.
The serial port of a PC, to
configure the DSP33. See
Configuring the DSP33
loudspeakers using a computer,
page 23.
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Connecting the digital loudspeakers
To connect two DSP33 loudspeakers
in a Meridian system
● Link the two digital speakers together using the S5 lead
supplied, as shown in the illustration.
● Set the CHANNEL switch to the appropriate position on each
562V Multimedia Controller
loudspeaker.
DIGITAL
COMMS OUTPUT
To use a DSP33 loudspeaker as a
centre speaker
M5 lead
DSP33 – Main R
DSP33 – Main L
DIGITAL
COMMS
DIGITAL
COMMS
You can use a single DSP33 as a centre speaker in a Meridian
surround system.
INPUT OUTPUT OUTPUT INPUT
INPUT OUTPUT OUTPUT INPUT
1
2
1
CHANNEL
CHANNEL
2
● Connect the speaker to the CENTRE digital output using an
M5 lead, as shown in the previous illustration.
S5 lead
● Set the CHANNEL switch on the back of the loudspeaker to
You can connect two DSP33 loudspeakers directly to a Meridian
DVD player, Meridian 568 Digital Surround Processor, Meridian
561 Digital Surround Controller, or Meridian 562V Multimedia
Controller.
the LEFT/CENTRE position.
● Connect one of the COMMS sockets on the Meridian source
or control unit, and the MAIN digital output, to one of the
digital speakers using the M5 lead supplied.
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To connect three or more DSP33
loudspeakers in a Meridian surround
system
If your system includes more than two Meridian DSP
loudspeakers you will need a 511 S-patch box (available
separately) to link together the S5 leads from each speaker, as
shown on the left.
DSP33
Centre (master)
● Use the comms part of an M5 lead to connect one of the
COMMS sockets on the Meridian Surround Controller to the
digital speaker you have chosen as the master (typically the
centre speaker).
568 Digital Surround Processor
● Use the audio part of the M5 lead to connect the digital
COMMS DIGITAL OUTPUTS
speaker to the appropriate digital output socket.
M5 lead
● Connect the COMMS output from the master digital speaker
511 S-patch box
S5 lead (digital unused)
S5 lead
to one socket on the 511 using an S5 lead.
● Link all the other digital speakers together using S5 leads, as
shown in the illustration. The other sockets on the 511 can be
used to distribute the comms to each slave speaker.
DSP33 – Main R
DSP33 – Main L
DIGITAL
COMMS
DIGITAL
COMMS
INPUT OUTPUT OUTPUT INPUT
INPUT OUTPUT OUTPUT INPUT
1
1
CHANNEL
CHANNEL
2
2
● Use the duplicate sockets on each digital speaker to link the
speakers together in pairs, corresponding to the pairs of
channels on the digital outputs.
S5 lead
● Set the CHANNEL switch on the back of each speaker to the
appropriate position.
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To connect two DSP33 loudspeakers
to a Meridian CD Player or other
digital source
● Connect the 512 Remote Eye to the other socket on the D5
lead.
● Link the two digital speakers together using the S5 lead
supplied, as shown in the illustration.
508.24 24-Bit CD Player
512 Remote Eye
● Set the CHANNEL switch to the appropriate position on each
DIGITAL
COMMS OUTPUT
loudspeaker.
D5 lead
M5 lead
See the chapter Using the DSP33 Digital Loudspeaker system,
page 19, for information about controlling the DSP33
loudspeakers.
DSP33 – Main R
DSP33 – Main L
DIGITAL
COMMS
DIGITAL
COMMS
INPUT OUTPUT OUTPUT INPUT
INPUT OUTPUT OUTPUT INPUT
1
1
CHANNEL
CHANNEL
2
2
S5 lead
You can create a complete system by connecting a pair of DSP33
loudspeakers directly to a digital source. You need the optional
Meridian 512 Remote Eye, and a D5 lead, to allow you to control
the volume and balance using the Meridian System Remote.
● Connect one of the COMMS sockets on the Meridian source,
and the digital output, to one of the digital speakers and one
of the sockets on the D5 lead, as shown in the diagram.
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To use the DSP33 as a multimedia
speaker with a PC
The DSP33 can be controlled via its RS232 port using any
terminal emulation software such as HyperTerminal. This allows
you to control the volume, balance, phase, bass and tilt in
addition to the advanced setup features described in the next
chapter.
● Connect the DSP33s together with the S5 lead supplied, as
shown in To connect two DSP33 Loudspeakers in a Meridian
system, page 15.
● Connect one end of the phono part of the M5 lead to the input
on the DSP33, and connect the other end to the soundcard’s
SPDIF digital output.
● Set the CHANNEL switch to the appropriate position on each
loudspeaker.
● Connect the RS232 lead to a serial port on the PC.
An application note giving more information is available on the
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Using the DSP33 Digital
Loudspeaker System
In systems with a Meridian preamplifier or control unit all of the functions
of the DSP33, including volume, tilt, and bass, are operated via the
controller. For more information refer to the user guide for the preamplifier
or control unit, and you can ignore this chapter.
However, the DSP33 Digital Loudspeaker System can also be connected
directly to up to two digital sources to create a complete, minimum
system. This chapter provides step-by-step instructions for operating the
digital loudspeakers in a system with no Meridian preamplifier or control
unit.
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Selecting a source
When not playing, the digital loudspeakers should be left in the
standby state. This uses a negligible amount of electricity, but
ensures that the components of the loudspeakers operate at
maximum efficiency from the moment you start.
To switch to standby
● Press Off on the remote.
The loudspeakers will switch to standby and the back panel
indicator on each speaker will dim.
If you are not going to use the digital loudspeakers for several
days you should switch each unit completely off at the back
panel, and disconnect it from the AC power supply.
To select a source
● Press the appropriate source key on the remote; eg DVD.
This will bring the digital loudspeakers out of standby, and the
back-panel indicator on each speaker will be bright.
As standard, all the sources are set to select the D1 digital input
of the DSP33. To select the D2 input, see To configure the
source options, page 31.
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Adjusting the balance or phase
The balance control of the DSP33 Digital Loudspeaker System
uses digital signal processing to compensate for an off-centre
listening position by delaying and diminishing the sound in one
speaker, thus effectively shifting the speaker’s image back.
To change the phase
● Press A on the remote.
The phase function controls the absolute phase of the digital
conversion. It can be used to compensate for signals that are
out of phase, giving an unnatural-sounding bass.
To change the balance
● Press <or >on the remote.
There are 20 settings in each direction.
To reset the balance to the centre
● Press Von the remote.
Note: Because the use of the balance control processes the
digital signal, you may hear a slight clicking as the balance is
adjusted.
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Configuring the DSP33
loudspeakers using a
computer
The DSP33 Digital Loudspeaker System provides a range of configuration
options, which you can change to suit your own preferences and the other
equipment in your system. To configure the DSP33 Digital Loudspeaker
System you connect the master loudspeaker to a PC, and then use the
Meridian Configuration program to set the configuration you want.
This chapter explains how to install the Meridian Configuration program,
and then how to use it create your own configuration of the DSP33.
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The Meridian Configuration program
The Meridian Configuration program is a stand-alone Windows-
based application that lets you design your own configuration of
the DSP33 Digital Loudspeaker System to suit your own
personal preferences and the particular configuration of
equipment in your system.
Requirements
To use the Meridian Configuration program you need:
❍ A computer running Windows 95, Windows 98, or Windows
NT 4.00.
The Meridian Configuration program provides the following
sections to allow you to control the corresponding aspects of
the speaker’s operation:
❍ A 100MHz or faster Pentium-class processor.
❍ At least 16Mbytes of RAM.
❍ 5Mbytes of free disk space.
❍ A vacant 9-pin serial port assigned to one of COM1 to 4.
Setup
The software requires a mouse or similar pointing device – it
cannot be operated solely from the keyboard.
Lets you specify general features of the multimedia
controller’s operation, including the operation of the
volume control and menus, and settings affecting
its operation in multi-room systems.
To install the Meridian Configuration
program
Sources
● Insert the first Meridian Configuration program installation
Lets you customise the operation of each of the
sources, including the audio input used for the
source, and additional information about the type of
each source.
disk.
● Choose Run... from the Start menu.
● Type A: setup and press R.
● Follow the on-screen instructions, inserting the second
installation disk when prompted.
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Running the Meridian Configuration program
To run the Meridian Configuration
program
Button
Option
New
Function
Creates a new settings file.
Opens an existing settings file.
● Click Start, point at Programs, Meridian then click Product
Open
Save
Configuration.
Saves the current settings file to
disk.
The Meridian window will be displayed:
Fetch
Fetches the current configuration
of the attached product.
Store
Stores the current settings to the
attached product.
Disconnect
Disconnects the program from the
attached product.
Add Product Adds a product to the current
settings.
Copy
Paste
About
Copies text or settings onto the
clipboard.
The toolbar provides a convenient way of accessing the most
important menu options:
Pastes text or settings from the
clipboard.
Displays program information.
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To select which loudspeaker to
configure
To connect the serial cable
The serial cable is symmetrical, and can be connected either
way round.
In any system incorporating one or more DSP33 loudspeaker
you will need to configure the master DSP33 loudspeaker; ie the
one connected to the COMMS socket on your preamplifier or
control unit by an M5 lead.
● Connect one end to the RS232 connector on the back panel
of the DSP33 loudspeaker.
● Connect the other end to one of the serial ports on the PC or
You will only need to configure the other DSP33 loudspeakers in
your system if you want to change the Front or Centre speaker
boundary from its default value, Free, or set a Centre speaker
tilt offset. For more information see Changing the setup options,
page 29.
PC notebook computer.
Then specify the serial port you are using as follows:
● Choose Options... from the View menu to display the
Options dialogue box:
● Select the port you want to use and click the OK button.
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Creating a new settings file
This section explains how to create a new settings file, using the
Meridian Configuration program, and how to enter personal
information to identify the settings in your product.
A new settings file will be created for you, with the initial name
MSF1, and the Meridian window will show a Digital active
loudspeaker icon to identify the product you are configuring.
If you are programming the DSP33 Loudspeaker for the first
time:
● Click the New button in the toolbar.
If you are amending an existing configuration:
● Click the Fetch button to fetch the existing settings.
The Progress dialogue box will show you the progress as the
● Choose Save As from the File menu, enter an appropriate
name for the file, such as your name, and click the Save
button.
settings are fetched:
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To display the settings
To display or edit the settings
● Double-click the Digital active loudspeaker icon, to open it
● Double-click the Settings icon.
and display the settings it contains.
The Meridian window will change to show the two categories of
The left-hand panel of the Meridian window will change to show
settings contained in the settings file: Sources and Setup.
the following two icons:
The options available in each case are explained in the following
sections.
At this stage you may find it useful to maximise the Meridian
Configuration program window so you can see all the options on
each screen.
Settings is the initial configuration in the settings file.
Double-clicking Return to top level takes you back to the
previous level.
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Changing the setup options
The next stage in editing the settings is to configure the general
If you choose Meridian surround controller the Start volume,
Tilt, and Bass options are controlled by the surround controller,
and will be greyed out in the Meridian Configuration program.
Setup options.
To change the setup options
● Set the Speaker use to Normal for a main or surround
● Click the Setup icon in the left-hand panel of the Meridian
speaker, or Centre for a centre speaker.
window.
If the speaker is close to a wall or corner, you can optionally
apply bass equalisation to adjust the frequency response to
compensate for its position.
The Setup options will be displayed:
● Use the appropriate Front or Centre speaker boundary
drop-down menu to choose the appropriate option:
Option
Free
What it means
Flat frequency response.
Boundary
Sub 1 or 2
Speaker closer than 0.5m (2') to a wall.
Applies a second-order high-pass filter at
80Hz or 120Hz respectively for use with
an analogue subwoofer.
Corner
Speaker closer than 0.5m (2') to a corner.
● In the Controlled by section choose the appropriate option
29
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For best results with a Meridian D1500 or D2500 subwoofer
Advanced options
choose Free, Boundary, or Corner as appropriate.
The Advanced options are described in the following table:
If you have specified the Speaker Use as Centre you can apply
a Centre Speaker tilt offset, which is added to the Tilt value for
the selected source.
Option
What it means
Volume control
Specifies whether the DSP33
provides volume control for the
The recommended setting is -1dB when the speaker is
positioned above a television.
system. Choose Main if the DSP33 is
in the main room, Secondary if the
DSP33 is used in a second room, or
None if the DSP33 is in the second or
third room of a three-room system.
Start volume
The Start volume setting determines the volume selected on
coming out of standby.
Comms controller
status
Specifies whether the DSP33 is
controller, not controller, or set
automatically.
● Set the Start volume to 65 to leave the volume unchanged
(as on other Meridian products).
System address
For multi-room setups.
● Set the Start volume to a value other than 65 to set the
volume to that value.
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Setting up sources
This section describes how to use the Meridian Configuration
program to configure the sources provided by the digital active
loudspeaker.
To configure the source options
● Select the source in the list of sources.
The settings for the source are shown in a panel to the right:
To set up sources
● Click the Sources icon in the left-hand panel of the Meridian
window.
The right-hand panel shows a list of the 12 sources that are
available. For each source you can configure its audio, tone, and
advanced settings.
To change the name used to identify the source when using
RS232 control:
● Choose a name from the Name drop-down menu.
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Choosing Unused prevents the source from appearing when
you press the corresponding source key on the Meridian System
Remote.
Bass
The Bass setting allows you to adjust the bass response to
match the room. The Bass can be adjusted between -5dB and
+5dB steps.
The name used to identify each source is shown in the list of
sources, followed by the Meridian System Remote key used to
select the source in brackets.
The effect of the Tilt and Bass settings on the frequency
response of the loudspeaker is shown in the following graphs:
Bass Boost
/
Cut
Tilt
● From the Audio source drop-down menu specify the digital
5
5.5
5
4.5
4.5
4
4
3.5
input you want to use for the source.
3.5
3
)
)
3
B
d
(
B
d
(
2.5
2.5
2
2
1.5
e
d
u
t
e
d
u
t
1.5
1
1
0.5
0.5
i
l
p
m
A
i
l
p
m
A
0
0
-0.5
-0.5
Initially all sources are set up to use input D1, but you can
connect a second source to D2.
-1
-1.5
-2
-1
-1.5
-2
-2.5
-2.5
-3
-3
-3.5
-4
-3.5
-4
-4.5
-4.5
-5
-5
-5.5
102
103
104
102
103
104
Frequency (Hz)
Frequency (Hz)
Tilt
Bass
Tilt
The Tilt setting allows you to adjust the broad balance of the
DSP33 to correct for the acoustics of your listening room, or for
a misbalanced recording.
If the DSP33 loudspeakers are controlled by a Meridian
Surround Controller, the Tilt and Bass settings are adjusted by
the surround controller.
The Tilt can be adjusted between -10dB and +10dB in 0.5dB
steps. Normally settings between -2.0dB and 1.0dB will give the
most natural results.
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Advanced
Specify the Advanced options as follows:
● Select Poor digital audio source if you have difficulty locking
to the source.
● If the source is connected to another Meridian unit, set
Comms type to 1C for a Meridian CD player, 2C for a
Meridian FM tuner, and 3C for a Meridian DVD player.
Otherwise set it to None.
● If you have two Meridian source units of the same type you
can configure them to have different Comms addresses. You
can then select the appropriate source by specifying its
Comms address in the Comms address field.
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Completing the configuration
The final stage in creating a settings file is to save it, and then
store it to the speaker.
If the download was successful the DSP33 will switch itself to
standby and the back-panel indicator will go dim.
To save the current settings
● Choose Save from the File menu or click the Save toolbar
button, to save the changes you have made to the
settings file to your PC hard disk.
To store the settings to the DSP33
loudspeaker
● Click the Store button.
The settings will then be downloaded and the back-panel
indicator will flash.
As the download proceeds the following dialogue box shows its
progress:
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Troubleshooting
This chapter provides suggested solutions to typical problems that may
occur when setting up the digital loudspeaker(s).
If you are still not able to resolve a difficulty with the help of this guide and
the suggestions in the following pages, please contact your Meridian
dealer or Meridian Audio Ltd.
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Troubleshooting
Green indicator on back panel not lit
Unit goes silent when played hard
Check the following:
❍ DSP33 has a temperature sensing system on board, which
prevents overheating of the electronics. The sound will
continue when the speaker has cooled.
❍ There is AC power connected to the socket on the back of the
DSP33.
❍ The power switch on the back panel of the DSP33 is turned
Drive units move when the speaker is
switched on or off
on.
If the DSP33 will still not illuminate, check any fuses in your
power supply and the fuse in the inlet of the DSP33. If these are
all intact, contact your dealer.
❍ This is normal as the speaker active electronics settle.
There is radio interference
Remote not working
The DSP33 is a digital audio and computing device which has
been designed to very high standards of electromagnetic
compatibility.
Check the following:
❍ The battery in the Meridian System Remote.
❍ See if the DSP33 has been set up as not controller in the
Meridian Configuration program; see Changing the setup
options, page 29. Note that this may be deliberate by your
dealer.
If this equipment does cause or suffer from interference to/from
radio or television reception then the following measures should
be tried:
❍ Reorient the receiving aerial (or antenna) or route the antenna
cable of the receiver as far as possible from the DSP33 and its
cabling.
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❍ Ensure that the receiver uses well-screened antenna cable.
❍ Relocate the receiver with respect to the DSP33.
❍ Connect the receiver and this product to different AC outlets.
❍ If the problem persists contact your dealer.
Meridian Configuration program
repeatedly fails to talk to the
loudspeaker
❍ Check that you have selected a COMMS port.
❍ Check that no other program currently running is using the
COMMS port.
Centre not working
There may be a connection problem.
❍ Check that it is connected correctly.
❍ Turn off the DSP33 for a few seconds and turn back on, then
retry.
❍ Check that the channel switch is set to LEFT/CENTRE.
❍ Quit from all other programs and retry.
❍ Reboot the computer and retry.
Configuring the DSP33 does not have
any effect
❍ Ensure you are using the serial lead supplied with the product,
or a null modem cable.
Make sure that you are configuring the DSP33 used as the
master digital loudspeaker in the system. This determines the
configuration of all digital loudspeakers in the system.
❍ If you are using a laptop try turning off the screensaver or
power management software.
Unit stays in standby – light is dim
Green indicator on back panel is
flashing
❍ Check that it is connected correctly.
❍ Turn the system on from another Meridian product in the
system.
This normally indicates that the DSP33 is overheating, and that it
has shut down to cool down. If the DSP33 is cold, it may
indicate a fault.
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Only the master loudspeaker plays
❍ Check the S5 cables are connected correctly.
Sound is odd or mono
❍ Check the channel selector switches on both loudspeakers
are correctly set.
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Service and guarantee
Service
Guarantee
The Meridian components have been carefully designed to give
years of untroubled service. There are no user-serviceable parts
inside the case, nor do the units require any form of
maintenance.
The DSP33 Digital Loudspeaker System is guaranteed against
defects in material and workmanship for two years from the date
of purchase.
The guarantee is void if the DSP33 Digital Loudspeaker System
has been subject to misuse, accident, or negligence, or has
been tampered with or modified in any way without the written
authorisation of Meridian Audio Limited. Note that connecting
anything other than the correct network lead to the COMMS
sockets may cause damage to the DSP33 Digital Loudspeaker
System which will not be covered by this guarantee. Attempted
servicing by unauthorised people may also invalidate this
guarantee. Labour and carriage charges are not covered unless
by local agreement.
In the unlikely event that your DSP33 fails to function correctly,
it should be returned, in its original packaging, to your Meridian
dealer.
In case of difficulty within the UK or USA please contact the
appropriate sales and service address shown on page ii.
In case of difficulty outside the UK or USA, contact the importing
agent for the territory. A list of Meridian agents abroad is
available from Meridian Audio.
Outside the UK, local warranty liability is restricted to equipment
purchased within the territory. Our agents abroad are only under
contractual obligation to service under guarantee equipment
sold through them. They are entitled to make a non-refundable
charge for any service carried out on other equipment.
No responsibility can be accepted for the DSP33 whilst in transit
to the factory or an agent, and customers are therefore advised
to insure the unit. When seeking service under guarantee, proof
of the date of purchase will be required.
This guarantee does not limit your statutory rights within the
United Kingdom.
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Index
A
B
Accessories
8
M
Meridian 500 Series
communications
2
S
Safety warnings 11
Audio inputs, digital 14
4
Sample configurations
DSP33 Digital Loudspeaker
Meridian comms 4, 14
Meridian Configuration
program 24
Back panel 13
Balance 22
Bass 32
System
Meridian Digital Compact
Theatre™
6
installation 24
5
running 25
Save As (File menu) 27
Selecting a source 20
Serial cable, connecting 26
Serial port, specifying 26
Settings file, creating 27
Settings icon 28
C
Centre speaker
toolbar buttons 25
Meridian Digital Compact
not working 37
using DSP33 as 15
Theatre™
5
Communications connections 14
Components 10
Meridian High Resolution (MHR)
Muting the sound 21
3
Computer, configuring using 23
Configuring the digital surround
controller
Setup icon 24, 29
O
P
R
Options (View menu) 26
Options dialogue box 26
Setup options, using a PC 29
Sources
using a computer 23
using the reset plug 13
configuring options using a PC 31
selecting 20
Phase 22
Positioning 11
setting up using a PC 31
Sources icon 24, 31
D
I
Digital audio inputs 14
Digital audio output 14
Radio interference 10, 36
Remote
Specification
Standby
7
Drivers
2
troubleshooting 36
Reset plug 13
switching to 20
Installing the Meridian
Configuration program 24
Return to top level icon 28
Introduction
1
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T
Tilt 32
Toolbar buttons 25
Troubleshooting 35
U
V
Unpacking 10
Volume
adjusting 21
muting 21
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