I N S T A L L A T I O N G U I D E
FOR USE IN MULTI-CHANNEL MUSIC OR HOME THEATER SYSTEMS
HIGH DEFINITION, LEFT/CENTER/RIGHT CHANNEL BOOKSHELF LOUDSPEAKER
HDLCRBX
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INTRODUCTION
The Niles HDLCRbx High-Definition, Left/Center/Right Channel Loudspeaker is expressly designed
for superior sonic quality in front left-, center-, or front right-channel applications. It employs ad-
vanced technology components that extract the subtle nuances in recorded music or the thunder-
ous action sound in a movie. The HDLCRbx is the perfect choice wherever quality of sound is the
most important consideration.
FEATURES AND BENEFITS
DUAL 5-1/4-INCH TCC WOOFERS WITH BUTYL-RUBBER
SUSPENSION
The HDLCRbx features newly-developed woofer-cone material that combines injection-molded
polypropylene with talc, carbon, and ceramic (TCC) stiffening agents. As a result, the cone offers
extreme stiffness and light weight for accurate, dynamic response. Additionally, the use of a butyl-
rubber suspension offers substantial benefits, including increased movement without mechanical
limitations, weather resistance, and improved midrange damping for better detail and clarity.
BUMPBACK™ WOOFER MAGNETS
Niles engineers have utilized a unique woofer magnet construction, allowing far greater “throw” or
voice-coil excursion. The result is a new level of deep bass performance.
1-INCH TETERON TRI-LAMINATE TWEETER
The HDLCRbx’s Teteron Tweeter employs a tri-laminate design consisting of an inner textile layer,
which forms the dome, a high damping layer to kill unwanted resonances, and an outside layer of
urethane to add stiffness and prevent breakup modes. The result is a transparently clear, sweet,
natural-sounding tweeter, which still maintains extended frequency response.
D.S.F.G. DIRECTED SOUND FIELD GEOMETRY® DELIVERS
OPTIMUM PHASE RESPONSE TO LISTENERS AND
COMPENSATES FOR HIGH LOUDSPEAKER PLACEMENT
The HDLCRbx employs Niles’ D.S.F.G. Directed Sound Field Geometry®. With D.S.F.G., the tweeter is
offset from the center of the dual woofers. The resulting acoustic interaction between the woofers
and the offset tweeter results in the flattest frequency and phase response, approximately
15-degrees off-axis from the tweeter. This gives optimum performance to a seated listener, even if
the loudspeaker is mounted above or below a TV or screen.
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NILESS AUDIIO CORPORATTION –– 1-80000-BUY-HIFI
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ACOUSTIC FINE TUNING
The HDLCRbx includes acoustic fine-tuning controls on the rear panel. These controls enable optimiza-
tion of the high frequencies and dialog with 3 dB of Treble Cut and 3 dB of Dialog Enhancement.
D.S.F.G. DIRECTED SOUND FIELD GEOMETRY® DEFEAT
The HDLCRbx includes a rear-panel control that enables the installer to deactivate the D.S.F.G.
Directed Sound Field Geometry® in certain applications. For example, when the loudspeaker is
installed at ear level behind a perforated screen, the loudspeaker’s response can be improved with
D.S.F.G. defeated.
NILES’ HD HIGH-DEFINITION VOICE MATCHING
Ensures compatibility with other Niles HD High-Definition in-wall, on-wall, and ceiling-mount models
to accommodate a wide range of system designs.
DOLBY® DIGITAL READY
The HDLCRbx is specifically designed for Home Theater Sound. This model exceeds the specifications
set forth by Dolby Laboratories for the accurate reproduction of Dolby Digital-Encoded Sources.
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INSTALLATION CONSIDERATIONS
RECOMMENDED AMPLIFIER POWER
For satisfactory performance, we recommend using a surround amplifier with a power rating of
10 to 150 watts. Curiously, most loudspeakers are not damaged by large amplifiers, but rather
by small amplifiers. If your system is playing loud music, a small amplifier will run out of power
very quickly and can create damaging “clipping” distortions. A more powerful amplifier will play at
the same volume without distorting. See OPERATION on page 10 for more information about
amplifier clipping distortion.
LOUDSPEAKER WIRE
Use 2-conductor loudspeaker wire when connecting loudspeakers to your receiver or amplifier. For
most applications, we recommend using 16- or 18-gauge wire. For wiring runs longer than 80 feet,
we recommend 14-gauge wire. The HDLCRbx’s gold-plated, five-way binding posts will accommo-
date up to 12-gauge wire directly. Larger sizes can be accommodated via pin connectors.
NOTE: THE HDLCRBX FEATURES GOLD-PLATED, FIVE-WAY BINDING POSTS THAT CAN BE CONNECTED IN
SEVERAL DIFFERENT WAYS (E.G., BANANA PLUGS, SPADE TERMINALS, AND DIRECT WIRING).
When running wire inside walls or ceilings, use special jacketed cable (CL-2 or CL-3) to protect the
wire and for fire prevention. In some areas, conduit is also required. For a trouble-free installation,
low-voltage wire such as loudspeaker wire must be run in accordance with the National Electri-
cal Code and any applicable provisions of the local building code. If you are unsure of the correct
installation techniques, wire jacket, or type of conduit to use, consult a professional audio/video
installer, building contractor, or the local building and inspection department.
TECH TIP
Wire size is expressed by its AWG (American
Wire Gauge) number – the lower the number,
the larger the wire. For example, 12 AWG is
physically larger than 14 AWG.
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LOUDSPEAKER PLACEMENT
NOTE: THE NILES HDLCRBX LOUDSPEAKER IS DESIGNED FOR USE IN FRONT LEFT-, CENTER-, OR
FRONT RIGHT-CHANNEL APPLICATIONS ONLY. FOR BEST RESULTS, PLACE THE HDLCRBX ON A STAND
OR BOOKSHELF. FOR REAR-CHANNEL APPLICATIONS, WE RECOMMEND USING A NILES HDFX OR
CM6HDFX LOUDSPEAKER.
PLACING HDLCRBX’S AS THE FRONT LEFT AND
RIGHT LOUDSPEAKERS
In a home theater, the intelligibility of dialog and action reproduced by the front loudspeakers is para-
mount! The position of the loudspeakers plays a very important role in how clear the sound is and
how a stereo image is created. Here are some guidelines to make the process of placement quick
and easy:
• Make sure the sound will not be blocked or reflected off furniture or other objects.
The listener should have a direct line of sight with the front of the loudspeaker. To
determine the best position, measure the “listening” distance between the ideal
listening position (e.g., favorite chair or couch) and the wall in which you plan to install
the loudspeakers.
• For stereo music applications, try to place the loudspeakers so that they are equally
distant from the listening spot and at least one half of the listening distance apart to
maintain a large pleasant stereo “image.”
• In home theater applications where there is a center channel, you may choose to space
the left and right main loudspeakers farther apart for a “bigger than life” sound with
Dolby® encoded movies and TV shows. However, for combined music and movie usage,
we recommend using the placement zone for stereo music. Ideally, if the listening
position is 10 feet back from the wall, place the loudspeakers between 5 and 10 feet
apart, as shown in Figure 1.
Figure 1. Recommended
HDLCRbx loudspeaker placement
for front left and right channels.
Loudspeaker
Placement Zone
10'
10'
5'
Loudspeaker
Placement Zone
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As for placement height, place front left and right loudspeakers vertically on either side of the
picture source, so that their tweeters are not more than 24 inches above or below the center-
channel loudspeaker’s tweeter (see Figure 2 on page 6). For best response, orient the
loudspeakers so the tweeters face out.
NOTE: DO NOT PLACE AN HDLCRBX LOUDSPEAKER TOO CLOSE TO A DIRECT-VIEW TV MONITOR, AS IT
MAY CAUSE PICTURE DISCOLORATION. TEST THE PLACEMENT DISTANCE FOR PICTURE DEGRADATION
BEFORE INSTALLATION.
THE BOUNDARY EFFECT
Placing a loudspeaker in a corner can powerfully affect the way a listener perceives bass re-
sponse. Known as the boundary effect, placing loudspeakers close to a wall/ceiling boundary or
near a corner-wall boundary will emphasize certain bass frequencies, while canceling others. This
effect can make the loudspeaker sound excessively boomy and inaccurate to some listeners, while
to others it just seems like more bass sound.
As a good rule-of-thumb, if you like listening to your current pair of loudspeakers with the bass
turned up, you’ll enjoy corner placement. However, if you listen with the tone controls at neutral,
try keeping the loudspeakers at least 2 or 3 feet from the boundaries of the room.
PLACING AN HDLCRBX AS THE CENTER-CHANNEL
LOUDSPEAKER
The center-channel loudspeaker is the workhorse in a home theater system. It handles all of the
critical dialog and is vitally important in creating the illusion of sounds emanating directly from the
picture. Here are some tips for obtaining optimum center-channel performance:
• In a typical installation, place the HDLCRbx horizontally, directly above the television or
projection screen. Try to insure that the loudspeaker is not placed too high relative to
the left and right loudspeakers, as shown in Figure 2 (on the next page).
(CONTINUED ON NEXT PAGE)
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PLACING AN HDLCRBX AS THE CENTER-CHANNEL
LOUDSPEAKER (CONTINUED)
HDLCRBX
HDLCR
HDLCR
HDLCRBX
Figure 2. If the HDLCRbx is placed above a TV, orient the loudspeaker with the tweeter
up. If it is placed below a TV, orient the HDLCRbx with the tweeter down.
• For installations where a perforated projection screen will be used, place the HDLCRbx,
either horizontally or vertically, behind the screen at ear level, as shown in Figure 3.
NOTE: WHEN PLACING THE HDLCRBX AT EAR LEVEL, SET THE D.S.F.G. SWITCH (ON THE REAR)
TO DEFEAT. SEE PAGE 7 FOR MORE DETAILS.
HDLCR
HDLCR
HDLCRBX
Figure 3. Recommended HDLCRbx center-channel placement behind a perforated
projection screen.
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FINISHING THE INSTALLATION
CONNECTING THE LOUDSPEAKER
1. At each loudspeaker, separate the loudspeaker wire so that at least 2 inches of each
conductor are free. Strip away 1/4 inch of insulation from each loudspeaker wire. Using
correct polarity, connect the appropriate conductor to each five-way binding post.
NOTE: Observe correct polarity: Positive (+) goes to the RED post and negative (–) goes
to the BLACK post. If you are unsure of wire polarity, see the section, Checking
Loudspeaker Phase on page 8.
2. Connect the other end of the loudspeaker wires to the home theater receiver (or ampli-
fier) in the same way.
3. Turn on the home theater receiver and calibrate all loudspeakers in the system accord-
ing to the receiver manufacturer’s instructions.
CHECKING LOUDSPEAKER ORIENTATION FOR D.S.F.G.
DIRECTED SOUND FIELD GEOMETRY®
The D.S.F.G. Directed Sound Field Geometry provides optimum off-axis phase and frequency re-
sponse due to the acoustic interaction between the woofers and the tweeter. The flattest response
will be obtained approximately 15 degrees off-axis in the direction opposite the tweeter. For opti-
mum performance, refer to Figure 4 (on the next page) and orient the loudspeaker as follows:
• For center-channel use above a TV, place the HDLCRbx horizontally with the tweeter
up. Set the D.S.F.G. switch to On.
• For center-channel use below a TV, place the HDLCRbx horizontally with the tweeter
down. Set the D.S.F.G. switch to On.
• For front-channel use, place one HDLCRbx vertically on either side of the TV so the
tweeters face outward. If the HDLCRbxs are at ear level, set both D.S.F.G. switches to
Defeat. If the HDLCRbxs are above or below ear level, set both D.S.F.G. switches to On.
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ACOUSTIC FINE TUNING
Each HDLCRbx loudspeaker features separate Treble Cut and Dialog Enhance controls on the rear
for acoustic fine-tuning after placement, as shown in Figure 4. Adjust these controls as follows:
• Initially set Treble Cut to Flat and Dialog Enhance to Normal.
• If a HDLCRbx is placed in a room with highly reflective surfaces like glass or tile or the
reproduced sound is too bright, set the Treble Cut switch to – 3 dB to lower the high-
frequency response.
• Listen to dialog being reproduced on the HDLCRbx. If you want it more pronounced, set
the Dialog Enhance switch to Enhance to boost the mid-frequency response.
Figure 4. The HDLCRbx’s Treble Cut, Dialog Enhance, and D.S.F.G. switches.
CHECKING LOUDSPEAKER PHASE
Loudspeaker wire has two conductors. On both your loudspeaker and amplifier, one conductor
is attached to the negative (–) terminals, while the other is attached to the positive (+) terminals.
Usually, the wire is marked for your convenience, but the marking can be done in the following
different ways:
• Stripe on one wire
• Ribbed area you can feel on one conductor
• Different colors of metal wire on each conductor
• Fabric strand or string wound into one of the conductors
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Of course, there are some wires that appear completely identical. So be careful, or you might make
a connection mistake. If you do, one loudspeaker will be playing “out-of-phase” with the other
loudspeaker. A pair of out-of-phase loudspeakers works against each other, and the sound of the
two playing together will be lacking in bass and sound “phasey.” If you suspect the sound is not
right, and you cannot see any markings on the wire, try this simple test:
1. Stand halfway between the loudspeakers.
2. Play some music with the amplifier or receiver set to Mono.
3. Listen to the richness of the bass and the loudness of the sound.
4. Turn off the amplifier and reverse the connections on one amplifier channel only.
5. Repeat the listening test with the same volume control setting. When the sound has a
richer bass and is slightly louder, the loudspeakers are working together or “in-phase.”
INSTALLING THE GRILLE
If desired, at each loudspeaker, carefully fit the grille to its cabinet. Starting with one corner, gently
press the grille frame around the loudspeaker’s edge, pushing it in at each of the four recessed
holes. When properly installed, the grille will be absolutely flush in appearance with the cabinet.
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OPERATION
LISTENING AT HIGHER VOLUMES
Achieving a reasonable volume of sound in a large room requires more amplifier power than it does
in a small room. It is possible to turn the volume up so high that the amplifier runs out of power.
This creates “clipping” distortion, which will make treble sound very harsh and unmusical.
When you hear harsh-sounding treble from any good loudspeaker, turn the volume down immedi-
ately! Those harsh sounds are masking much more powerful ultra-high-frequency sound spikes,
which will quickly damage any fine loudspeaker. You are much less likely to damage a loudspeaker
driven by a large amplifier because it will be very loud before any clipping distortion is produced.
CLEANING
To clean the enclosure, use a dampened soft cloth or paper towel. To clean the grille, use a gentle
vacuum cleaner.
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SPECIFICATIONS
Driver Complement
• Two 5-1/4" TCC Woofers
• 1" Teteron Tweeter with fluid cooling
Design Principle
• Acoustic suspension with a tuned port
• D.S.F.G. Directed Sound Field Geometry® for optimum phase and
frequency response
Recommended Amplifier Power
10 to 150 watts per channel
Nominal Impedance
4 ohms
Frequency Response
45 Hz to 21 kHz, +/- 3 dB
Sensitivity
90 dB with 2.83 V pink noise input, measured at 1 meter on axis
Dimensions
21" L x 7-1/4" W x 9-3/4" D
Weight
21 lb
Wiring Requirements
We recommend using 16- to 18-gauge loudspeaker wire for runs up to 80 feet and
14-gauge loudspeaker wire for runs up to 200 feet. The connectors will accommodate
12- to 22-gauge wire.
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LIMITED WARRANTY
NILES AUDIO CORPORATION (“NILES”) WARRANTS ITS LOUDSPEAKER PRODUCTS TO THE ORIGINAL PUR-
CHASER TO BE FREE OF MANUFACTURING DEFECTS IN MATERIAL AND WORKMANSHIP FOR A PERIOD OF FIVE
YEARS FROM DATE OF PURCHASE.
THIS WARRANTY IS SUBJECT TO THE FOLLOWING ADDITIONAL CONDITIONS AND LIMITATIONS. THE WARRANTY
IS VOID AND INAPPLICABLE IF NILES DEEMS THAT THE PRODUCT HAS BEEN USED OR HANDLED OTHER THAN IN
ACCORDANCE WITH THE INSTRUCTIONS PROVIDED BY THE MANUFACTURER, INCLUDING BUT NOT LIMITED TO
DAMAGE CAUSED BY ACCIDENT, MISHANDLING, IMPROPER INSTALLATION, ABUSE, NEGLIGENCE, OR NORMAL
WEAR AND TEAR, OR ANY DEFECT CAUSED BY REPAIR TO THE PRODUCT BY ANYONE OTHER THAN NILES OR AN
AUTHORIZED NILES DEALER.
TO OBTAIN WARRANTY SERVICE, TAKE THE UNIT TO THE NEAREST AUTHORIZED NILES DEALER, WHO WILL
TEST THE PRODUCT AND IF NECESSARY, FORWARD IT TO NILES FOR SERVICE. IF THERE ARE NO AUTHORIZED
NILES DEALERS IN YOUR AREA, YOU MUST WRITE TO NILES AND INCLUDE YOUR NAME, ADDRESS, MODEL AND
SERIAL NUMBER OF YOUR UNIT, ALONG WITH A BRIEF DESCRIPTION OF THE PROBLEM. A FACTORY RETURN
AUTHORIZATION NUMBER WILL BE SENT TO YOU. DO NOT RETURN ANY UNIT WITHOUT FIRST RECEIVING WRITTEN
AUTHORIZATION AND SHIPPING INSTRUCTIONS FROM NILES.
IF THE ABOVE CONDITIONS ARE MET, THE PURCHASER’S SOLE REMEDY SHALL BE TO RETURN THE PRODUCT TO
NILES, IN WHICH CASE NILES WILL REPAIR OR REPLACE, AT ITS SOLE OPTION, THE DEFECTIVE PRODUCT WITHOUT
CHARGE FOR PARTS OR LABOR. NILES WILL RETURN A UNIT REPAIRED OR REPLACED UNDER WARRANTY BY
SHIPPING SAME BY ITS USUAL SHIPPING METHOD FROM THE FACTORY (ONLY) AT ITS EXPENSE WITHIN THE
UNITED STATES OF AMERICA. THERE ARE NO OTHER WARRANTIES, INCLUDING WITHOUT LIMITATION, EITHER
EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WITH
RESPECT TO THE PRODUCT.
REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE CONSUMER/
PURCHASER. NILES SHALL NOT BE RESPONSIBLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES EXCEPT TO
THE EXTENT PROVIDED (OR PROHIBITED) BY APPLICABLE LAW.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES,
SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND
YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE.
FOR THE NAME OF YOUR NEAREST AUTHORIZED NILES DEALER CONTACT:
NILES AUDIO CORPORATION, P.O. BOX 160818, MIAMI, FLORIDA 33116-0818.
Please fill in your product information and retain for your records.
Model______________________Serial No.___________________ Purchase Date_______
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WARRANTY REGISTRATION CARD
Model Purchased_________________________________________________________
Serial Number___________________________________________________________
Date Purchased (month/day/year)_____________________________________________
Dealer Name and Location__________________________________________________
______________________________________________________________________
❍
❍
❍
❍
❍
Dr.
Miss
Mr.
Mrs.
Ms.
Name__________________________________________________________________
Address__________________________________________________________________
____________________________________________________________________
City_______________________________________State________________Zip______
Telephone (
)__________________________________________________
Please take a moment to fill out our warranty registration card. The information helps us to get to
know you better and develop the products you want
Age:
Musical tastes:
(Please check
all that apply)
What magazines
do you read?
Do you . . . ?
❍
❍
Under 25
Own a House. If yes,
❍
❍
❍
❍
25-34
1. ________________
how many square feet?
❍
35-44
Alternative
2. ________________
3. ________________
❍
45-54
55 & over
Classical
❍
Country
❍
Own a Town House/
❍
Jazz
Condominium/Co-op
Income:
❍
New Age
❍
Rent an Apartment
Rent a House
Who will install
the product?
❍
Under $24,999
❍
Popular
❍
❍
❍
❍
❍
❍
❍
$25,000-$34,999
$35,000-$44,999
$45,000-$59,999
$60,000-$74,999
$75,000-$99,999
Over $99,999
❍
R&B
❍
Custom Installer
❍
Rock
Are you interested in
receiving literature on
other Niles products?
❍
Electrician
❍
Other _____________
❍
Friend
Myself
❍
How did you hear
about Niles?
❍
❍
Yes
No
Which factor(s) influenced
the purchase of your Niles
product? (Please check
all that apply)
❍
Architect/Developer
Are there products/
capabilities that you would
like to see introduced?
❍
Occupation:
Custom Installer
❍
❍
Arts/Entertainment
Direct Mail
❍
❍
Business Owner
Friend/Family
❍
Ease of Use
❍
❍
Engineer
In-Store Display
❍
Price/Value
❍
❍
Finance/Accounting
Interior Designer
❍
Product Features
❍
❍
General Office
Magazine Ad
❍
Quality/Durability
❍
❍
Management
Mail-Order Catalog
❍
Reputation
❍
❍
Professional
Newspaper Ad
❍
Style/Appearance
❍
❍
Sales/Marketing
Product Brochure
❍
Warranty
❍
❍
Student
Product Review
❍
❍
Tradesperson
Retail Salesperson
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®
BL E N D I N G HI G H FI D E L I T Y AN D AR C H I T E C T U R E
N i l e s A u d i o C o r p o r a t i o n
1 2 3 3 1 S . W . 1 3 0 S t r e e t M i a m i , F l o r i d a 3 3 1 8 6
D e s i g n e d a n d E n g i n e e r e d i n U S A
M a d e i n C h i n a
©2005 Niles Audio Corporation. All rights reserved. Niles, the Niles logos, Blending High Fidelity and
Architecture and D.S.F.G. Directed Sound Field Geometry are registered trademarks of Niles Audio Corporation.
All other trademarks are the property of their respective owners. Printed in China. 05/05 DS00420ACN
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