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
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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.
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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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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)
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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)
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NOTES
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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
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EmAIl tECHNICAl SUPPOrt
EmAIl fOr PrOdUCt SUggEStIONS
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