Niles Audio Speaker CS525 User Manual

I N S T A L L A T I O N  
&
O P E R A T I O N G U I D E  
M O D E L S  
E L S  
®
CS525  
CS650  
CONTRACTOR SERIES  
®
®
B L E N D I N G H I G H F I D E L I T Y A N D A R C H I T E C T U R E  
 
Introduction  
The CS or Contractor Series group of  
Blueprint Series In-Wall Loudspeakers®  
offers speakers expressly designed for flex-  
ibility of use. They function well as prima-  
ry speakers in bedrooms, dens or living  
rooms; as main or surround speakers in  
home theaters; or in large arrays in com-  
mercial spaces. The CS525/CS650 offer a  
unique combination of adaptability, per-  
formance and value which makes them  
perfect in a wide variety of applications.  
 
Features and Benefits  
Hi-Polymer Woofer  
Eight Ohm Impedance  
The CS525 and CS650 models feature a  
unique woofer construction process  
called Hi-Polymer Bonding that combines  
a waterproof nylon layer with a traditional  
pulp-based long throw woofer with a  
treated foam rubber surround. Both mod-  
els feature custom perforated baskets to  
keep construction debris from coming in  
contact with the woofer cone.  
The speakers are designed to be placed in  
multi-room systems with many pairs of  
speakers. The eight ohm impedance is a  
very easy electrical load for most ampli-  
fiers. This allows many pairs of CS speak-  
ers to be wired to a single amplifier using  
a Niles speaker selection system.  
Low Diffraction, Paintable Aluminum  
Grilles  
Polycarbonate Dome Tweeter  
CS speakers utilize rustproof aluminum  
grilles. The painted aluminum grille has  
hundreds of precisely sized perforations,  
creating an acoustically transparent grille.  
The 1” polycarbonate tweeter offers sur-  
prisingly wide dispersion characteristics  
for great stereo imaging, remarkable clar-  
ity, and moisture resistance.  
Infrared Sensor Mount  
X-MatrixReinforced Baffle  
The speaker baffle has a locator designed  
for the Niles MS-1 MicroSensor,™ a  
miniature infrared sensor. The MS-1  
installs discreetly behind the aluminum  
grille and therefore minimizes wall clut-  
ter in your home. When you want to  
control your equipment, you simply  
point your remote control at the speaker  
from up to 15 feet away.  
The X-Matrix Baffle design uses specially  
molded ribs constructed of ABS plastic to  
add rigidity to the baffle assembly. The  
end result is better clarity and detail.  
Absolutely Flush to the Wall Appearance  
The unique mounting system of the CS  
loudspeakers powerfully clamps the  
speaker to the bracket, sandwiching the  
wall material between them. Additionally,  
the Niles mounting system is carefully  
optimized to stiffen the surrounding dry-  
wall and prevent it from resonating. You  
hear only the music, not the drywall.  
Easy Retrofit Installation in your  
Existing Home  
Designed for ease of installation, the Niles  
mounting system makes installations sim-  
ple and fast. A supplied template assures  
fast and accurate hole cutting. The bracket  
slips behind the drywall and the tightening  
of the screws sandwich the drywall  
between the bracket and speaker. The  
grille mounts over the speaker.  
 
3
Figure 1  
Frame/  
Speaker Baffle  
Bracket  
IR Knockout  
Grille  
Installation Considerations  
Recommended Amplifier Power  
Incorporating a Local Volume Control  
In a multi-room system there is one indis-  
pensible control for true convenience—a  
local volume control. It allows you to  
adjust the volume of the speakers without  
leaving the room.  
For satisfactory performance, we recom-  
mend an amplifier with a power rating of  
five to fifty watts for the CS525 and  
CS650. Curiously, most speakers are not  
damaged by large amplifiers but by small  
amplifiers. If your system is playing loudly,  
a small amplifier will run out of power  
very quickly. When an amplifier runs out  
of power it creates damaging “clipping”  
distortion. A large amplifier will play at the  
same volume without distorting. See the  
section on operating the speakers for more  
information about clipping distortion.  
Plan to wire the system so that each pair  
of speakers has its own volume control  
built into the wall (think of a volume con-  
trol as a dimmer switch for sound).  
Niles makes a wide range of high perfor-  
mance indoor and outdoor volume con-  
trols. They are available in Standard or  
Decora® style cover plates (just like your  
 
light switches and dimmers). Volume con- trol all of the functions of your system  
trols are connected in line with the speak- from the room with the remote pair of  
er, so you must connect the wire from the speakers. Niles makes a number of IR sen-  
amplifier to the volume control and then sors which install in the wall, in the ceiling,  
from the volume control to the speaker.  
in cabinetry, on tabletops, or even behind  
the grille of your Niles CS speakers.  
Speaker Wire  
Use 2-conductor speaker wire when con- An IR sensor requires that a 2-conductor  
necting CS speakers to your receiver or shielded wire (West Penn D291 or equiva-  
amplifier. For most applications, we rec- lent) be home run from each sensor loca-  
ommend you use 16 or 18 gauge wire. tion to the main equipment location. This  
For wiring runs longer than 80 feet we wire is normally run beside the speaker  
recommend 14 gauge wire. The spring wire at the same time. Typically, the sen-  
loaded terminals of the CS speakers will sor is placed in a location that faces your  
accommodate up to 12 gauge wire listening position. Most remote controls  
directly. Larger sizes can be accommodat- will have an effective line of sight range of  
ed via pin connectors.  
18 to 30 feet with any Niles sensor placed  
TECH TIP  
Wire size is expressed by its AWG (American Wire  
Gauge) number. The lower the number, the larger  
the wire, i.e. twelve AWG is physically larger than  
fourteen AWG.  
When you run wire inside walls, special in a wall, ceiling, on a cabinet or tabletop  
jacketing (CL-2 or CL-3) is required to However, when you place a Niles MS-1  
both protect the wire and for fire preven- MicroSensor behind the perforated alu-  
tion. In some areas conduit is required. minum grille of a speaker the effective  
For a trouble-free installation, low voltage range is reduced to 9 to 15 feet.  
wire such as speaker wire must be run in  
accordance with the National Electrical  
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, your  
building contractor, or the local building  
and inspection department.  
Insulating the Wall Cavity  
For best performance from your speakers  
fill the wall cavity behind the speaker  
with fiberglass insulation (e.g. R-19 unbat-  
ted insulation). Try to keep the same  
amount of insulation for each speaker,  
particularly in the same room, for consis-  
tent bass response.  
Incorporating a Remote Control  
If you are planning to use a stereo system  
with a hand held IR remote control, con-  
sider the advantages of installing a Niles  
IR Repeater system. You are able to con-  
 
5
You should have a direct line of sight with  
the front of the speaker. To determine the  
best position, measure the “listening” dis-  
tance between the ideal listening position  
(your favorite chair or couch) and the wall  
in which you plan to install the speakers.  
Try to place the speakers so that they are  
equally distant from your listening spot and  
at least one half of the listening distance  
apart (this maintains 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  
speakers farther apart for a “bigger than  
life” sound with Dolby® encoded movies  
and TV shows. However, for combined  
music and movie usage stay within the  
good placement zone for music. For exam-  
ple; if you are ten feet back from the wall,  
the speakers should be between five and  
ten feet apart (See Figure 2).  
Speaker Placement  
Placement for Critical Listening  
If you like to imagine that the band or  
orchestra is playing in front of you as you  
listen to music, or you are very conscious  
of clarity, detail and the textures of the  
individual instruments, you are a critical  
listener.  
In a home theater, the intelligibility of dia-  
log and action reproduced by the front  
speakers is paramount! The position of the  
speakers plays a very important role in  
how clear the sound is and how a stereo  
image is created. Here are some guide-  
lines to make the process of placement  
quick and easy.  
Make sure the sound will not be blocked  
or reflected off of furniture or other objects.  
Speaker  
Placement  
Zone  
10’  
10’  
5’  
Speaker  
Placement  
Zone  
Figure 2  
 
The Boundary Effect  
You can make listener position still less  
Corners can affect the bass response of critical by using mono rather than stereo  
the speaker powerfully! This is called the This can be difficult to achieve with nor-  
boundary effect. You will emphasize par- mal stereo amplifiers. However, Niles  
ticular bass frequencies and cancel out manufactures Systems Integration  
other bass frequencies when you place Amplifiers which enable one room to be  
speakers close to the wall/ceiling bound- wired in stereo while other rooms are  
ary or a corner wall boundary. This can wired in mono! Consult your local Niles  
make the speaker sound excessively dealer for more information.  
boomy and inaccurate to some listeners,  
In smaller rooms or rooms that are infre-  
while to others it just seems like more  
quently used, you typically can’t justify  
bass sound. A good rule of thumb is if  
the expense of more than two speakers  
you always listen to your current pair of  
Try to bracket the room with the two  
speakers with the bass turned up, you’ll  
speakers. Diagonal placement is a very  
enjoy corner placement. If you keep your  
effective way to stretch the coverage pat-  
tone controls at neutral, try to keep the  
tern of two speakers. You can also com-  
speakers at least one or two feet from the  
promise between direct sound (for detai  
boundaries of the room.  
and clarity) and reflected sound (the  
ambient or “all around you” effect). By  
trying to place the speakers so that they  
Positions  
Placement for Varying Listening  
create as much reflected sound as possi-  
If you want the freedom to sit anywhere  
ble you emphasize the ambient effect  
in a room facing any direction, and/or  
They can be up high in the wall or even  
find that you prefer the “all around you”  
down low at power outlet height , in the  
sound of some car stereos to a conven-  
ceiling, near corners, or directed at  
tional “sound stage” facing you, consider  
reflective objects and walls. The more  
the speaker placement techniques profes-  
reflected sound there is in the room the  
sional installers use in restaurants and  
stronger the ambient effect at low vol-  
bars. They place speakers in an array  
umes. You should use moderation, how-  
around the listening area, so that the  
ever, otherwise the compromise becomes  
music is always surrounding you, regard-  
too one sided and at high volumes the  
less of the direction you face.  
sound will be blurred and less distinct.  
The rule of thumb is to add one pair of  
speakers for every 100 to 200 square feet Placement for Rear Home Theater  
of listening area. Curiously, this is not so Applications  
that you can play the music louder, but In a home theater, the goal is to repro-  
so that you can play it softer! When you duce the experience of a great movie the-  
have only one pair of speakers in a large ater in our homes. The biggest difference  
room you will notice that when the between the two is the rear or surround  
sound is perfect in one part of the room, speaker array in a commercial theater  
it is too loud near the speakers. By plac- Here, it is not uncommon to see twenty  
ing more than one pair in the room you or thirty speakers around the audience  
will avoid these “hot spots” of loud This huge array of speakers assures that  
sound and you will create still more you will feel completely surrounded by  
sonic ambiance while maintaining clarity the ambient soundtrack of the movie  
and a rich sound everywhere.  
Film makers try to use the “surround”  
 
7
soundtrack to envelope you in the envi- the rear speakers, stay within five to eight  
ronment on screen. They will place back-  
ground music, rain sounds, traffic noise,  
etc. on the “surround” soundtrack. In a  
home with a single pair of speakers it is  
easy for the jungle sounds to sound like  
they are “in the middle of your head” just  
like headphones!  
feet of the listening location. If you are  
using a 25 to 50 watt amplifier you can  
mount the speakers 10 to 15 feet away  
from the listening location and still  
achieve reasonably high volume levels.  
Of course, the best way to emulate the  
sound of multiple speakers is to use multi-  
ple speakers. In large or unusually shaped  
rooms this might be the only way to  
achieve a good effect. If you like to listen  
to music surround modes which emulate  
A single pair of CS Loudspeakers, properly  
placed, can create a very convincing sim-  
ulation of an array of speakers. If you  
place them near a hard reflecting surface  
you can make one pair of speakers sound concert hall acoustics, more than two sur-  
round speakers will prove extraordinarily  
effective. With Niles CS loudspeakers it is  
easy to add another pair without affecting  
the decor of the room. However, you will  
need to use a much more powerful ampli-  
fier than that which is built into a typical  
surround sound receiver or amplifier.  
Niles makes a number of Systems  
Integration Amplifiers with proprietary fea-  
tures that make them uniquely suited to  
enhance a good surround sound system.  
Consult your Niles dealer for more infor-  
mation.  
like several. Create as many reflections as  
possible by mounting the speaker up high  
in the wall so that the ceiling will act as a  
powerful reflector. If you place the speak-  
ers near a corner, wash the sound down a  
wall from a ceiling location, or mount the  
speakers as far away as you can from the  
listening area, more reflections will occur.  
However, all of these placement tech-  
niques require that you work your sur-  
round sound amplifier channels harder. If  
the surround sound system you are using  
has a small five or ten watt amplifier for  
 
Side-by-side wiring is unavoidable in par-  
ticular spots in every house, just move the  
speaker wire route away as soon as possi-  
ble. If construction forces a side by side  
run for more than ten feet, install meta  
conduit or shielded speaker wire. Low-  
voltage wires such as doorbells, inter-  
coms, telephone, security, or television  
cannot cause interference or hum on your  
speaker wires, so you can safely run all of  
them at the same time, through the same  
holes, side-by-side.  
Installation  
Fundamentals  
Running the Speaker Wire in New  
Construction  
If you have doubts about whether you are  
capable of installing a Niles Blueprint  
Series In-Wall Speaker in your walls, con-  
sult a Niles dealer or professional installer.  
They have special tools, techniques, and  
experience to make the impossible possi-  
ble. The installer can provide you with an  
estimate before any work is done.  
Before you drill any holes, mount the  
speaker brackets in the desired speaker  
locations and mount p-rings or open  
backed J-boxes where the in-wall volume  
controls and stereo equipment will be.  
Scheduling and Preparation  
Plan to schedule the speaker wiring after  
the electrical wiring is finished. That way  
you can avoid wire routes which could  
potentially induce hum over the speaker  
wire. The basic rules are:  
Safety First!  
Wear gloves, safety goggles and head pro-  
tection when drilling. Avoid nails, they ruin  
bits and they can create injury. Pay particu-  
lar care when using “hole-hogs” and other  
powerful electric drills; the torque of the  
drill when suddenly stopped by a nail can  
break the wrist of a strong man.  
• Never run speaker wire through the  
same hole as an electrical cable.  
• Never run speaker wire into the same  
J-box as electrical cable.  
Drilling  
• Avoid running the speaker wire beside  
the electrical cable. Keep it at least three  
or four feet distant from any electrical  
power cable.  
Use a bit that is large enough for the wires  
you plan to run. An auger bit is the pre-  
ferred bit for rough-in wiring. It will actu-  
ally pull itself through the wood, so that  
the drill motor, not you, does most of the  
work. You will be drilling a lot of holes,  
so this is important.  
Figure 3  
Always drill the holes in the center of the  
stud. If you have to notch the stud or dril  
the hole closer than one inch from the  
edge of the stud, protect the wire with a  
nail plate (See Figure 3).  
When drilling holes in ceiling joists dril  
in the center of the joists and try to locate  
the hole near the end of the joist. DO  
NOT drill through a “gluelam” or any  
load bearing beam without the direction  
of your contractor.  
 
9
Try to line the holes up perfectly, because cable around the house. What you see  
it makes pulling the wire much easier. A  
good technique is to snap a chalk line  
across the face of the studs or against the  
bottom of the ceiling joists. Then work  
backward so that you can always see the  
holes you have already drilled. Paying  
careful attention to this will save you a lot  
of time later on!  
when you look at the painted wall  
board, plaster, or paneling is only the  
skin of the wall. Behind the skin is the  
skeleton; two-by-four wood or metal  
“studs” running vertically from the floor  
to the ceiling in walls and two-by-six or  
larger “joists” running horizontally in the  
ceilings and floors. In between the studs  
and the joists is the space for the wiring  
and plumbing of your home.  
Pulling the Cable  
Pull the cable in sections (from the stereo  
to the volume control, from the volume  
control to the speaker). Start with the  
longest sections and use left over wire to  
complete the short sections. If you plan to  
pull many rooms at the same time  
through a central route, walk off the dis-  
tance to each destination, add a generous  
fudge factor for turns and other obstacles,  
then cut off each section so that you have  
a bundle of wires you can pull at once.  
Exterior walls are different. They must  
insulate the house from the heat and  
cold outside, so they are stuffed with  
insulation. The national building code  
requires that the hollow wall space in  
exterior walls be broken by a horizontal  
stud placed between the vertical studs.  
This “fire blocking” makes it very diffi-  
cult to retrofit long lengths of wire. In  
some areas of the country the exterior  
walls are constructed of solid masonry,  
and have no hollow space for speakers  
or wires.  
Whenever you run the wire further than  
four and one half feet from a hole in a  
stud or joist (open attic space, going up  
walls, etc.), fasten the wire to the joists or  
studs using cable clamps or appropriately  
sized wire staples. The wire should not  
have large sags in it, nor should it be too  
tight. Try to protect the wire from being  
stepped on in attics or other unfinished  
crawl spaces. There are guard strips, race-  
ways and conduits which can be used to  
protect the cable. Consult the local build-  
ing code for special requirements in your  
area.  
Start by examining all the possible routes  
you might take to run the speaker wire  
from the speaker to the volume control  
and back to the stereo. Use a stud sensor  
or other device to locate the internal  
structure of the wall. You want to avoid  
all studs or joists. A typical route would  
be: from the speaker location up the  
inside of the wall to a new hole drilled  
into the top “plate” (horizontal two-by-  
four at the top of the inside of the wall),  
into the attic crawl space, then down to  
the volume control location through  
Concealing Speaker Wire in Existing  
Walls  
This is actually a fairly simple task if you another top plate, back up to the attic,  
restrict your choice of speaker locations across the attic, and finally down anoth-  
and wire routes to the interior walls or er plate to the wall behind the stereo sys-  
ceilings of your home. Interior walls in tem itself (See Figure 4). The other very  
almost all North American residences are common route is through the bottom  
hollow, so that it is easy to flush mount plate of the wall into an unfinished base-  
speakers into them and route new speaker ment or crawl space.  
 
cover plate and switch or  
receptacle, and shining a  
penlight into the wall. If you  
have access to an attic or  
basement space you can  
quickly see which part of the  
wall space the wire is free of  
obstructions (See Figure 5).  
When you dont have access  
above or below the wall, try  
to estimate the existing wire  
and pipe locations from the  
positions of electrical outlets  
and plumbed fixtures on both  
sides of the wall. Take a look  
at the outside of your house  
too, sometimes conduit, vents  
or drain pipe will be visible  
that give useful information  
Choose the route with the  
fewest potential obstacles.  
Speaker  
Location  
Volume  
Control  
Location  
Stereo  
Location  
Figure 4  
If your house is built on a slab or you are  
wiring between two finished floors, look  
for baseboards which could be removed  
and replaced with the wire behind them  
Doorjambs can be removed and often  
have enough space for speaker wire al  
the way around the door (See Figure 6).  
Identify where all of your electrical,  
phone, and TV wiring is likely to be and  
plan to route around it all. You can acci-  
dentally induce 60 Hz hum on your  
speakers if you run your speaker wire right  
beside electrical wire for more than a few  
feet. Try to keep speaker wire running par-  
allel to power cables at least 3 feet away.  
To find exactly where an electrical cable is  
routed, try inspecting the inside of the wall  
by turning off the breaker for a particular  
power outlet or switch, removing the  
Sometimes, an under-the-carpet run is  
possible (there are special flat speaker  
wires made for under-the-rug wire runs)  
As a last resort, heating and air condition-  
ing vents can be used as wire raceways for  
Unobstructed space  
for speaker wiring  
Figure 5  
 
11  
Figure 6  
plenum rated wire (check your local  
building codes, some municipalities  
require conduit).  
In traditional wood stud/drywall construc-  
tion you can cut the hole for the speaker  
and utilize the large hole to auger holes  
across, up or down the wall for as far as  
your drill bit will take you. If you have  
matching paint and take reasonable care in  
patching you can cut a hatch in the dry-  
wall at each stud, run your wire, and patch  
and touch-up the wall (See Figure 7).  
When you are dealing with the unknown  
because of the structure of your home, or  
with difficult to patch wall materials like  
plaster, lath and plaster, faux finishes,  
wallpaper etc., be patient. A careful study  
of the potential problems before you start  
the job will pay off.  
Figure 7  
 
If the wires movement is obstructed by a  
pipe or cable, fill the hole (s) with spackle  
or other patching compound and try  
another location.  
Installation  
of Speakers  
2. When determining the final location of  
the cutout keep in mind that the frame  
and bracket will extend beyond the  
cutout. Make sure that you do not place  
the edge of the cutout directly next to a  
stud. Locate the studs using a stud sensor  
or hand-knocking. Once you have deter-  
mined the correct position for the cutout,  
hold the supplied template up to the wal  
surface. Level the template in either the  
horizontal or the vertical position and  
mark the wall with a pencil. Drill the four  
corners with a 1/4” drill bit.  
IMPORTANT: Before you cut into any  
wall, review the sections on running  
wire and speaker placement.  
1. Drill a 1/8” pilot hole just barely  
through the wallboard or dry wall (1/2” to  
5/8” deep in most homes) about an inch  
below the center of your proposed speak-  
er location (an inch to the side if you are  
mounting the speaker horizontally). BE  
VERY CAREFUL NO T TO DRILL  
THROUGH EXISTING WIRES, PIPES, OR  
STRUCTURE. IF YOU FEEL ANY EXTRA  
RESISTANCE AS YOU ARE DRILLING,  
STOP. Cut a piece of coat hanger equal to  
the width of the bracket. Bend the wire in  
half creating a right angle. Poke the “L-  
shaped” wire into the pilot hole and turn it  
in a complete circle. If it turns freely,  
repeat the procedure from a hole about an  
inch above the center of your proposed  
speaker location (See Figure 11).  
3. If you are cutting a painted or wal  
papered drywall use a sheetrock or keyhole  
saw. Cut the hole with the saw at a 45  
degree angle. That way, the drywall section  
can be replaced cleanly if there is an unseen  
obstruction behind the wall. BE VERY  
CAREFUL NO T TO SAW THRO UGH  
EXISTING WIRES, PIPES, OR STRUCTURE  
IF YOU FEEL ANY EXTRA RESISTANCE AS  
YOU ARE CUTTING, STOP.  
4. If you are cutting into lath and plaster  
walls, use masking tape to outline your  
penciled marks, drill the four corners with  
a 1/4” bit and use a razor to score the  
plaster down to the lath beneath. Then use  
a chisel to remove all of the plaster within  
the taped outline. Finally, insert a meta  
cutting blade into a sabre saw and very  
slowly and carefully saw the lath. Sawing  
the lath can easily vibrate plaster off the  
wall. If you have the patience, use a pair  
of tin snips to slowly nip away at the lath  
instead. There is no risk with this method,  
it is just time consuming.  
Figure 11  
 
13  
Installing a Niles MS-1 MicroSensor™  
There is a 1/2" round molded "IR Sensor  
Knockout" on the face of the  
speaker baffle. To prevent dam-  
age to the crossover network  
you must remove the  
5. Fill the wall cavity with insulation at this  
point. Remember to use equal amounts  
of insulation for each speaker.  
Installing the Speaker  
If the grille is already  
installed, remove it by  
using a bent paper clip or  
the tip of a corkscrew and  
pulling it away from the  
knockout from the rear of  
the speaker. Do not attempt  
to remove the knockout  
with the speaker face up.  
Lay the speaker face down on  
a clean carpet or rug. Put the tip  
Figure 12  
frame (See Figure 12).  
1. Separate the speaker wire so  
that at least two inches of each conduc-  
tor are free.  
of a screwdriver into the center of  
the round "knockout" and sharply tap the  
screwdriver handle as necessary. Install  
the MS-1 using its mounting hex nut and  
washer so that it is tightly secured to the  
speaker. Connect all wires and continue  
your installation.  
2. Strip one half inch of insulation from the  
end of each conductor of the speaker wire.  
3. If you have gold pin connectors which  
you wish to use, affix them to the stripped  
wire ends now.  
4. Connect one stripped wire end (or con-  
nector) to the black and one to the red termi-  
nal. Pay attention to the markings on the  
wire. Each speaker must be connected to the  
amplifier in the same way.  
5. Slip the bracket through the hole. Orient  
the speaker so that the speaker is level.  
Secure the speaker and the bracket by tight-  
ening the baffle screws. Do not overtighten  
the screws, this will distort the frame and the  
grilles will not fit (this is not permanent, just  
loosen the screws and the grille will pop in).  
The screws should pull the speaker and  
bracket together (sandwiching the drywall) so  
that the frame is absolutely flush with the wall  
surface. There should be no gaps between  
the wall and the frame (See Figure 13).  
6. Carefully fit the grille into its recess so that  
it is barely in place. Starting with one corner,  
go around the speaker, pushing the grille in a  
little bit each time. You should be gentle, the  
aluminum grille can be easily bent out of  
shape. The speaker will have an absolutely  
flush appearance when it is fully in place.  
Figure 13  
 
Painting the Aluminum Grilles  
Speaker Phase  
The grille is important to the sound of the  
CS loudspeakers. Do not fill the holes of  
the grille with paint. The grille is construct-  
ed of aluminum with a perfectly even  
powder coat overall. This powder coat is  
an ideal primer.  
Speaker wire has two conductors. One  
conductor is attached to the negative (-)  
terminals and one conductor is attached to  
the positive (+) terminals of both your  
speaker and your amplifier. Usually, the  
wire is marked for your convenience.  
There are different ways wires are marked:  
a stripe on one wire, a ribbed area of one  
conductor you can only feel, different col-  
ors of metal wire on each conductor, or  
there might be a fabric strand or string  
wound into one of the conductors. Of  
course, there are some wires which appear  
completely identical. Be careful, or you  
might make a mistake.  
Remove the grilles before painting. If you are  
using spray paint, use two thin coats without  
any primer. If you are using a compressor and  
a spray gun, use the finest, most diffuse  
setting. Practice first on some paper if you  
have no experience painting with spray paint.  
If you are using an applicator or brush, and  
a can of paint, thin the paint first. You do  
not want to have to poke hundreds of holes  
in your beautifully painted grilles.  
If you make a mistake, one speaker will be  
playing “out-of-phase” with the other  
speaker. An out-of-phase pair of speakers  
work against each other and the sound of  
the two speakers playing together will be  
lacking in bass and be “phasey” sounding.  
If you suspect the sound is not right and  
you cannot see any markings on the wire,  
try this simple test:  
1. Stand half way between the two speakers.  
2. Play some music with the amplifier or  
radio 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  
setting of the volume control. When the  
sound has a richer bass and is slightly  
louder the speakers are working together  
or “in-phase”.  
 
15  
Operation  
Listening at Higher Volumes  
It requires more power to achieve a rea-  
sonable volume of sound in a large room  
than it does in a small room. It is possi-  
ble (even if you are not a teenager) to  
turn the volume so high that the amplifi-  
er runs out of power. This creates “clip-  
ping” distortion.  
Clipping distortion makes treble sound  
very harsh and unmusical. When you hear  
harsh sounding treble from any good  
speaker, turn the volume down immedi-  
ately! Those harsh sounds are masking  
some much more powerful ultra-high-fre-  
quency sound spikes which will quickly  
damage any fine loudspeaker. You are  
much less likely to damage a speaker with  
a large amplifier because it will be very  
loud indeed before it produces any clip-  
ping distortion.  
Cleaning  
You can clean the speaker with a damp-  
ened soft cloth or paper towel. If the  
speaker is mounted high up on a wall or  
ceiling, use a broom to gently brush it off.  
 
Specifications  
Model CS525  
Model CS650  
Driver Compliment  
Driver Compliment  
5-1/4” Hi-Polymer laminate woofer  
6-1/2” Hi-Polymer laminate woofer  
1” polycarbonate tweeter  
1” polycarbonate tweeter  
Design Principle  
Design Principle  
Infinite baffle for large and varying air  
volumes  
Infinite baffle for large and varying air  
volumes  
Recommended Amplifier Power  
5 to 50 watts  
Recommended Amplifier Power  
5 to 50 watts  
Nominal Impedance  
8 Ohms  
Nominal Impedance  
8 Ohms  
Frequency Response  
65Hz-15kHz, +/-3dB  
Frequency Response  
60Hz-15kHz, +/-3dB  
Sensitivity  
89dB for 2.83V pink noise  
Sensitivity  
89dB for 2.83V pink noise  
Overall Exterior Frame Dimensions  
8-3/4” x 11-11/16”  
Overall Exterior Frame Dimensions  
7-1/8” x 9-7/8”  
Depth Behind Wall  
2-3/4” (Assumes 1/2” drywall)  
Depth Behind Wall  
2-1/2” (Assumes 1/2” drywall)  
Wall Cut-Out Dimensions  
7-5/16” x 10-1/4”  
Wall Cut-Out Dimensions  
6” x 8-3/4”  
Wiring Requirements  
Wiring Requirements  
0-30 ft. ................18 gauge  
30-80 ft. ............ 16 gauge  
80 ft. and up ...... 14 gauge  
0-30 ft. ................18 gauge  
30-80 ft. ............ 16 gauge  
80 ft. and up ...... 14 gauge  
Warranty  
Warranty  
Five year limited warranty  
Five year limited warranty  
 
17  
PLEASE FILL OUT THE  
WARRANTY REGISTRATION  
CARD ON THE REVERSE SIDE,  
DETACH, AND MAIL TO:  
Niles Audio Corporation  
Warranty Registration Dept.  
P.O. Box 160818  
Miami, Florida 33116-0818  
 
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:  
What magazines do  
you read?  
Do you . . .?  
Own a House. If yes,  
how many square feet?  
Under 25  
25-34  
35-44  
45-54  
55 & over  
(Please check all that  
apply)  
1._____________________  
2. ___________________  
3. ___________________  
__________________  
Alternative  
Classical  
Country  
Jazz  
New Age  
Popular  
R&B  
Rock  
Other______________  
Own a Town House/  
Condominium/Co-  
op  
Income:  
Who will install the  
product?  
Rent an Apartment  
Rent a House  
Under $24,999  
$25,000-$34,999  
$35,000-$44,999  
$45,000-$59,999  
$60,000-$74,999  
$75,000-$99,999  
Over $99,999  
Custom Installer  
Electrician  
Friend  
Are you interested in  
receiving literature on  
other Niles products?  
Myself  
How did you hear  
about Niles?  
No  
Yes  
Which factor(s) influ-  
enced the purchase  
of your Niles product?  
Architect/Developer  
Custom Installer  
Direct Mail  
Are there products/  
capabilities that you  
would like to see  
introduced?  
Occupation:  
Arts/Entertainment  
Business Owner  
Engineer  
Finance/Accounting  
General Office  
Management  
Professional  
Sales/Marketing  
Student  
Tradesperson  
(Please check all that  
apply)  
Friend/Family  
In-Store Display  
Interior Designer  
Magazine Ad  
Mail-Order Catalog  
Newspaper Ad  
Product Brochure  
Product Review  
Retail Salesperson  
____________________  
____________________  
____________________  
____________________  
____________________  
____________________  
Ease of Use  
Price/Value  
Product Features  
Quality/Durability  
Reputation  
Style/Appearance  
Warranty  
 
Limited Warranty  
Niles Audio Corporation ("NILES") warrants its loudspeaker products to the original purchaser  
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 FIT-  
NESS 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_____________________________________________________________________________  
 
®
Niles Audio Corporation  
12331 S.W. 130 Street  
Miami, Florida 33186  
Tel: (305) 238-4373  
Fax: (305) 238-0185  
©1999 Niles Audio Corporation. Because Niles strives to continuously improve  
products, Niles reserves the right to change product specifications without not  
Niles, the Niles logo, Blending High Fidelity and Architecture and Blueprint Se  
In-Wall Loudspeakers are registered trademarks of Niles Audio Corporation. Do  
is a registered trademark of Dolby Laboratories Licensing Corporation. Decora  
registered trademark of Leviton Manufacturing Co., Inc. DS00245A  
Printed in Taiwan  
 

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