c e i l i n g m o u n t
C M 7 S D I N S T A l l A T I o N G u I d e
DeSigneR AeStHeticS
AuDioPHile PeRFoRmAnce
CONGRATULATIONS!
INTROdUCTION
Thank you for choosing the Niles CM7SD Loudspeaker. With proper installation,
use, and care, your loudspeakers will deliver years of listening enjoyment. Niles
manufactures the industry’s most comprehensive line of custom installation
components and accessories. For information on our complete product
The Niles CM7SD Loudspeakers deliver an uncompromising combination of
designer oriented aesthetics, superb sound performance, and ease of installation.
Small footprint and low profile, MicroThin™ magnetically attached grilles provide
the look that today’s homeowners desire.
FEATURES ANd BENEFITS
TABLE OF CONTENTS
dESIGNER AESThETICS
Introduction
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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.
Features and Benefits
Parts Guide
INSTALLATION EASE
Four easy to use mounting clamps permit quick installation. Weather-resistant
construction enables installation in moist areas such as bathrooms or outdoors
under eaves.
Installation Considerations
Installing the Loudspeakers
Painting the Grilles
Installing the Grilles
Applications
INSTALL WITh CONFIdENCE
The best-built loudspeakers deserve the best protection—the Niles Lifetime
Limited Warranty.
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PARTS GUIdE
INSTALLATION CONSIdERATIONS continueD
NOTE: bE VEry carEful whEN lOcaTiNg ThE spEakErs. VErify all lOcaTiONs arE
clEar Of ObsTrucTiONs bEfOrE cuTTiNg ThE firsT hOlE.
PACKAGE CONTENTS FOR:
CM7SD
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).
(Stereo Input loudspeakers require four-conductor wiring).
(1) Niles CM loudspeaker, (1) Magnetically attached round grill, (1) Hole template
with painting standoffs, (1) Owner’s manual, (1) Warranty card.
INSTALLATION CONSIdERATIONS
Distance from speaker to amplifier
wire gauge
Recommended tools for installation:
Less than 80 feet
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• Cordless screwdriver
• One inch #2 Phillips tip
• 1/8” Drill bit
• Measuring tape
• Stud finder
• Spackle
• Painters tape
• Drop cloth
80 to 200 feet
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• Optional - a 24” x 24”
piece of R19 insulation
More than 200 feet
• Drywall saw
• Wire stripper
• Cable ties
• Pencil
• Laser plumb bob
• 12” -14” Coat hanger wire
Figure 2. Speaker Wire Gauge Guide
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.
The CM7SD requires an 8-1/2”
(21.6 cm) diameter hole opening
and a minimum of 2-3/4” (7.0 cm)
depth when measured from the
exterior face of the drywall. To the
sides of the hole you will need 1”
(2.54 cm) for the mounting tabs to
clamp the speaker to the drywall.
2-3/4" (7.0 cm)
Depth from Drywall
Exterior
Figure 1. Required dimensions for installation in ceiling.
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INSTALLING ThE LOUdSPEAKERS
INSTALLING ThE LOUdSPEAKERS continueD
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” (2.54 cm) to the sides of the
mounting hole for the mounting clamps to secure the speaker to the drywall.
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.
7. If you’ve chosen to use insulation behind the loudspeaker, place it
through the hole and center it on the opening. If using paper-backed
insulation, it should be placed so that the paper side is away from the
loudspeaker.
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.
8. The speaker has black and red
spring-loaded connectors (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
2. Cut a foot-long piece of coat hanger. Bend the wire (creating a right angle)
leaving 5-1/2” at one end (this allows for the extra width of the mounting
dogs). 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 2-3/4” of depth. 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).
speaker end. Failure to do so will
adversely affect the loudspeakers’
performance.
Figure 3. Spring-loaded speaker wire
connectors.
9. Once the speaker wires are
connected, carefully slide the
loudspeaker into the opening hole
(Figure 4). While holding the speaker
in place, tighten the mounting screws
to secure the speaker to the drywall.
We recommend using a motorized
screwdriver. Be careful not to over
tighten.
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.
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.
NOTE: DO NOT carry ThE spEakEr by ThE
TwEETEr Or TwEETEr briDgE. This may DamagE
ThE spEakEr.
NOTE: DO NOT iNsTall lOuDspEakErs bEfOrE ThE Drywall has bEEN cOmplETEly
fiNishED aND paiNTED.
Figure 4. Installing a
CM7SD loudspeaker.
Mounting clamps require
1” clearance to the sides
of the hole opening
(cONTiNuED ON NExT pagE)
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PAINTING ThE GRILLES
SPECIFICATIONS
Tweeter /
midrange amplifier power
recommended
Normal
impedance
frame Dimensions hole cut-Out
Depth (5/8”
The CM 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 slightly dilute the paint to prevent it from clogging the
grille holes.
model
woofer
with grille
Dimensions Drywall ceiling)
Mineral Filled
Polypropylene
woofer cone
3/4” Soft
10-100 watts
Dome
8 ohm nominal;
6 ohm minimum
8-3/4”
(22.2 cm)
2-1/8”
(5.4 cm)
9-7/8” (25.1 cm)
CM7SD
NOTES
INSTALLING ThE GRILLES
The Niles 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.
APPLICATIONS
The Niles CM7SD Loudspeakers are designed to be installed in any standard
ceiling. When choosing a location, thought should be given to the sound
coverage of the loudspeaker, and ease of running the speaker wire. The shallow
mounting depth of the CM7SD allows it to be mounted in a space that is only
2.75” deep.
STEREO SOUNd APPLICATIONS
The best stereo effect will be achieved if both
loudspeakers are at an equal distance from the
listening area. Ideally all loudspeakers should
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be on the same horizontal plane (Figure 6). Avoid
installing loudspeakers near corners to prevent
3-6'
a “boomy” or diffracted sound. Also note that
the lower the ceiling, the closer the loudspeaker
should be placed to the listener.
8'
Figure 6. Stereo Sound Application.
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NOTES
BY PHONE (IN USA)
1-800-BUY-HIFI (289-4434)
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
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