Niles Audio Speaker CM4PR User Manual

c e i l i n g m o u n t  
C M 4 p r I N S T A l l A T I o N G u I d e  
DeSigneR AeStHeticS  
AuDiopHile peRfoRmAnce  
 
INTROdUCTION  
CONGRATULATIONS!  
Thank you for choosing the Niles CM Series Loudspeakers. With proper  
installation, use, and care, your loudspeakers will deliver years of listening  
enjoyment. For information on the complete line of advanced Niles products,  
The designer aesthetics, superior sonic performance, and ease of installation of  
CM loudspeakers put them in a class above competitive products. The CM4PR  
loudspeaker features our advanced Rear Wave Control enclosure that is uniquely  
designed for retrofit installations and optimized for high quality, predictable sound  
performance and reduced sound bleed into adjacent rooms. The low profile,  
magnetically attached grilles blend into any room’s decor.  
TABLE OF CONTENTS  
Introduction  
3
FEATURES ANd BENEFITS  
Features and Benefits  
Parts Guide  
3
dESIGNER AESThETICS  
Magnetically attached MicroThin™ round speaker grilles ensure a clean,  
unobtrusive designer appearance that blends with the room’s aesthetics. Optional  
square grilles provide added design flexibility.  
4
Installation Considerations  
Installing the Loudspeaker  
Painting the Grilles  
Installing the Grilles  
Loudspeaker Applications  
Specifications  
4
GREAT SOUNd - whERE yOU wANT IT  
6
The CM4PR Rear Wave Control enclosure is uniquely designed to fit through  
the loudspeaker’s ceiling opening—ideal for retrofit installations. The enclosure  
is shaped and sized for high quality, predictable sound performance while  
significantly reducing unwanted sound from bleeding into adjacent rooms and  
spaces.  
8
8
INSTALLATION EASE  
8
Three easy to use, spring tensioned mounting clips permit quick installation  
and compensate for uneven mounting surfaces. Weather-resistant construction  
enables installation in moist areas such as in bathrooms or outdoors under eaves.  
10  
INSTALL wITh CONFIdENCE  
The best-built loudspeakers deserve the best protection—the Niles Lifetime  
Limited Warranty.  
WWW.NILESAUDIO.COM  
NILES AUDIO – 1-800-BUY-HIFI – 1-760-710-0992  
 
3
INSTALLATION CONSIdERATIONS continueD  
PARTS GUIdE  
PACKAGE CONTENTS – CM4PR  
NOTE: BE VERY CAREFUL WHEN LOCATING THE SPEAKERS. VERIFY ALL LOCATIONS ARE  
CLEAR OF OBSTRUCTIONS BEFORE CUTTING THE FIRST HOLE.  
(1) CM4PR loudspeaker with Rear Wave Control enclosure, (1) Magnetically  
attached round grill, (1) Hole template with painting standoffs, (1) Owner’s manual,  
(1) Warranty card  
Each speaker requires two-conductor wiring of sufficient gauge. The gauge depends  
on the length of the wire. For recommendations, please refer to (Figure 2).  
INSTALLATION CONSIdERATIONS  
Length of wire from speaker to amplifier  
Wire Gauge  
Recommended tools for installation:  
Less than 80 feet  
16  
• Cordless screwdriver  
• One inch #2 Phillips tip  
• 1/8” Drill bit  
• Measuring tape  
• Stud finder  
• Spackle  
• Painters tape  
• Drop cloth  
80 to 200 feet  
14  
12  
• Rubber gloves  
More than 200 feet  
Figure 2. Speaker Wire Gauge Guide  
• Drywall saw  
• Wire stripper  
• Cable ties  
• Pencil  
• Optional - a 24” x 24”  
piece of R19 insulation  
• Laser plumb bob  
• 12” -14” Coat hanger wire  
When running loudspeaker wire inside walls or ceilings, use special jacketed  
cable (CL-2 or CL-3 rating) to protect the wire and for fire prevention. In some  
municipalities, conduit is required. For a trouble-free installation, low voltage wire  
such as loudspeaker wire must be 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, building contractor, or the local building and  
inspection department.  
CM4PR  
These require a 4-5/8”  
(11.75 cm) diameter hole  
opening with a minimum  
of 3-5/16” (8.42 cm) depth  
when measured from the  
interior face of the drywall,  
plus at least 5” (11.75 cm)  
clearance to one side of  
the loudspeaker opening  
for the Rear Wave Control  
enclosure. To the sides of  
the hole you will need 1”  
for the mounting tabs to  
clamp the speaker to the  
drywall.  
3-5/16(8.4 cm)  
Depth Behind  
Drywall  
5(12.7 cm)  
Clearance  
Figure 1. CM4PR loudspeaker installation dimensions  
(CoNTINued oN NeXT pAGe)  
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NILES AUDIO – 1-800-BUY-HIFI – 1-760-710-0992  
 
5
INSTALLING ThE LOUdSPEAKERS  
It is often easier to lay the speakers out on the floor and then transfer the locations  
to the ceiling with a laser plumb bob. If you are using new construction brackets,  
place string across the centers of the bracket to provide a way to align the bracket  
to the laser. Remember, you will need 1” to the sides of the mounting hole for the  
mounting clamps to secure the speaker to the drywall and you will need at least 5”  
of clearance to one side within the opening for the CM4PR’s Rear Wave Enclosure.  
7. The speaker has black and red  
spring-loaded connectors attached  
to the Rear Wave Control enclosure  
(Figure 3). Black is for the negative  
(–) wire and red for the positive (+).  
It is important to observe correct  
wiring polarity. If you have wire other  
than black and red, make sure you  
connect it the same on the amplifier  
end as the speaker end. Failure  
1. Once you have determined a possible position for the hole cutout, drill a  
1/8” pilot hole just barely through the ceiling (1/2” to 5/8” deep in most  
homes) in the center of your proposed loudspeaker location. BE VERY  
CAREFUL NOT TO DRILL THROUGH EXISTING WIRES, PIPES, OR STRUCTURE.  
IF YOU FEEL ANY EXTRA RESISTANCE AS YOU ARE DRILLING, STOP.  
Figure 3. Securing the speaker wire with  
a wire tie.  
to do so will adversely affect the  
loudspeakers’ performance. Supports  
are provided to secure the speaker  
wire with wire ties. (not included)  
2. Cut a foot-long piece of coat hanger. Bend the wire (creating a right angle)  
leaving 3-5/16” at one end (this allows for the extra width of the Rear Wave  
Enclosure). Poke the “L-shaped” wire into the pilot hole and turn it in a  
complete circle and move it into the ceiling cavity to make sure you have  
approximately 3-5/16” of depth within the ceiling. If the wire’s movement is  
obstructed by anything, fill the hole(s) with spackle and try another location  
(If there is any risk of uninsulated electrical connections within the ceiling  
area, use insulating gloves or other materials or consult with an installation  
professional before proceeding).  
8. A safety wire anchor is provided on  
the Rear Wave Control enclosure  
should you be required to secure the  
loudspeaker assembly to a roof beam  
or rafter (Figure 4).  
9. Once the speaker wires and safety  
wire are connected, raise the  
mounting clips to a vertical position  
as shown in Figure 5 and carefully  
slide the loudspeaker with  
3. If the coat hanger moves freely in a complete circle and you have sufficient  
depth, tape the template to the ceiling and proceed to layout the other  
speakers. Once you are comfortable with all speaker locations, use a pencil  
to lightly outline the circular template.  
Figure 4. Attaching a safety wire.  
attached Rear Wave Control  
enclosure into the opening  
hole (Figure 5). CM4PR  
4. Drill the starting point of your cut with a 1/4” bit.  
5. If you are cutting drywall, use a sheetrock or keyhole saw. Cut the hole with  
the saw at a 45° angle. That way the drywall section can be replaced cleanly  
if there is an unseen obstruction behind the wall. IMPORTANT: BE VERY  
CAREFUL NOT TO SAW THROUGH EXISTING WIRES, PIPES, OR STRUCTURE. IF  
YOU FEEL EXTRA RESISTANCE AS YOU ARE CUTTING, STOP.  
loudspeakers feature spring  
loaded mounting clamps that  
allow the speaker to remain flush  
with the ceiling To remove a  
CM4PR from the ceiling, simply  
grasp the bezel edge and pull  
on the speaker slowly. This will  
cause the mounting clamps  
to disengage and free the  
NOTE: DO NOT INSTALL LOUDSPEAKERS BEFORE THE DRYWALL HAS BEEN COMPLETELY  
FINISHED AND PAINTED.  
Mounting clamps  
require 1” clearance  
to the sides of the  
hole opening  
6. Prep the speaker wire by stripping 1/4”-1/2” from each speaker lead. Twist  
the strands or tin the leads with solder to ensure there are no stray strands  
that could short and possibly harm the amplifier.  
loudspeaker.  
NOTE: DO NOT CARRY THE SPEAKER  
BY THE TWEETER OR TWEETER POST.  
THIS MAY DAMAGE THE SPEAKER.  
Figure 5. Inserting the loudspeaker into  
the opening hole.  
(CoNTINued oN NeXT pAGe)  
WWW.NILESAUDIO.COM  
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7
PAINTING ThE GRILLES  
LOUdSPEAKER APPLICATIONS (continueD)  
CM4PR loudspeaker grilles can be painted without priming, but the fabric scrim  
must first be removed. The installation template has die cut standoffs that can be  
used to position the grille off the ground while painting. Use several light coats  
sprayed from different sides and angles to cover all surfaces and not fill in any  
holes. If you do fill some holes, use compressed air to open them before the paint  
dries. It may be helpful to dilute the paint.  
SINGLE SPEAKER APPLICATIONS  
CM4PR loudspeakers are ideal for small rooms where positioning two larger  
loudspeakers is not practical. Examples would be a small kitchen, bathroom,  
hallway, or small bedroom. Locate the loudspeaker as close to the center of  
the room as possible for the most even distribution of sound (Figure 9). Avoid  
installing the loudspeaker near a corner to prevent a “boomy” or diffracted sound.  
INSTALLING ThE GRILLES  
The MicroThin™ speaker grille installs magnetically over the speaker. Carefully  
center the grill over the speaker and let the magnets do their work, verifying that  
the grill sets flush against the ceiling at all edges.  
LOUdSPEAKER APPLICATIONS  
The CM4PR Loudspeakers are designed to be installed in any standard ceiling  
where larger, bulkier loudspeakers would not fit. Additionally, their Rear Wave  
Control enclosure will minimize sound bleeding through to adjacent rooms,  
permitting even greater installation possibilities. While sold individuallly, optimum  
sound coverage may be obtained by installing pairs of CM4PR loudspeakers .  
When choosing a location, thought should be given to the sound coverage of the  
loudspeaker, and ease of running the speaker wire.  
Figure 9. Single Loudspeaker Application  
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9
SPECIFICATIONS  
Tweeter /  
Midrange Amplifier Power  
Recommended  
Normal  
Impedance  
Frame Dimensions Hole Cut-Out  
Depth (5/8”  
Model  
Woofer  
with Grille  
Dimensions Drywall Ceiling)  
3.5” Mineral  
Filled  
Polypropylene  
8 ohm nominal;  
6 ohm minimum  
4-5/8”  
(11.75 cm)  
3-5/16”  
(8.4 cm)  
1” Teteron  
25-100 watts  
5 -1/2” (14.0 cm)  
CM4PR  
BY PHONE (IN USA)  
1-800-BUY-HIFI (289-4434)  
NOTES  
BY PHONE (OUtSIdE USA)  
1-760-710-0992  
CUStOmEr SErvICE HOUrS  
8:00 AM to 5:30 PM PT  
tECHNICAl SUPPOrt HOUrS  
6:00 AM to 4:00 PM PT  
ON tHE wEB  
www.nilesaudio.com  
EmAIl tECHNICAl SUPPOrt  
EmAIl fOr PrOdUCt SUggEStIONS  
WWW.NILESAUDIO.COM  
NILES AUDIO – 1-800-BUY-HIFI – 1-760-710-0992  
 
11  

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