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CONGRATULATIONS!
Thank you for choosing a CM730DSFX, CM750DSFX or CM760DSFX loudspeaker from Niles. With proper installation and operation,
you will enjoy years of trouble-free use. Niles manufactures the industry’s most complete line of custom installation components and
accessories for audio/video systems. To see the complete Niles product assortment, visit us on the Internet at: www.nilesaudio.com
PACKAGE CONTENTS
Each package contains a pair of CM730DSFX, CM750DSFX or CM760DSFX loudspeakers; 1 pair of Aluminum MicroPerf™ Grilles and
1 pair of cardboard paint mask/hole cutout templates.
INSTALLATION CONSIDERATIONS
We recommend using the following tools and material to install your Niles CM loudspeaker:
Before starting the installation, please observe the following precautions:
RUNNING WIRES IN WALLS OR CEILINGS
When running loudspeaker wire inside walls or ceilings, use special jacketed cable (a minimum of 18 to 16-gauge two-conductor CL-2
or CL-3 rated loudspeaker wire) 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 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.
SELECTING THE LOCATION FOR YOUR LOUDSPEAKERS
The CM730DSFX, CM750DSFX or CM760DSFX loudspeakers are designed to be installed in any standard ceiling. There are two
considerations for placing the loudspeaker; ease of running the cable to the loudspeaker and coverage of the loudspeaker. The
CM730DSFX, CM750DSFX or CM760DSFX will be most convincing if both of the loudspeakers are at equal distance from the listener.
Avoid installing the loudspeakers near corners to prevent a “boomy” or diffracted sound. The CM730DSFX, CM750DSFX or CM760DSFX
loudspeakers will cover an area of a circle with a 16-foot diameter when mounted at an 8-foot height and pointed straight down.
(See Figure 1)
EXISTING CONSTRUCTION INSTALLATION
IMPORTANT: BEFORE YOU CUT INTO ANY WALL, REVIEW THE PRIOR SECTION ON LOUDSPEAKER PLACEMENT WHEN SELECTING THE
LOCATION FOR YOUR LOUDSPEAKERS.
1. When determining the location of the loudspeaker cutout, keep in mind that the mounting dogs will extend 3/4" beyond the cutout.
Make sure that you do not place the edge of the cutout directly next to a ceiling joist. Locate the joists using a stud sensor or by hand
knocking. Use the supplied cutout template (remove the largest perforated circle and use cardboard square with hole as the template) to
determine how large of a hole you will need to cut. These templates are packed with your loudspeakers between the styrofoam packing
and the ends of the box.
2. Once you have determined a possible position for the 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.
3. Cut a foot-long piece of coat hanger. Bend the wire (creating a right angle) leaving 6” 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 5-7/8" of depth. If the wire’s movement is obstructed by anything, fill the hole(s) with spackle and try
another location.
4. If the coat hanger moves freely in a complete circle and you have sufficient depth, hold the template up to the ceiling surface. The
cardboard square with the circular hole is the template. The inner perforated circle within the larger circle that was removed in step 1
earlier is the paint mask. Keep it for painting the loudspeaker later. Outline the circular cutout on the ceiling surface lightly with a pencil.
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.
NEW CONSTRUCTION INSTALLATION
INSULATING THE WALL CAVITY
If feasible, fill the wall cavity with insulation at this point.
MOUNTING THE NEW CONSTRUCTION BRACKET
The optional CM700DS BKT can be used with the CM730DSFX, CM750DSFX or CM760DSFX loudspeakers. The hole saving bracket enables
a faster and cleaner final installation of the loudspeaker. It forces the drywall installer to cut out the loudspeaker hole for you and provides
wire ties for the loudspeaker wire, reducing the risks of accidental loss or movement of the wire. In addition, it enables you to align your
loudspeakers with other ceiling fixtures with great accuracy since you can really see exactly where the loudspeaker will be. To install
the bracket, first pivot the long wing out until it stops, which will be in a straight line with the short wing. The wings and brackets have
centering lines to simplify placement of the loudspeakers. Screw one side of the assembled bracket with wings to the joist using one of
the supplied screws. Level the bracket. Screw the other side of the bracket/wing assembly to the joist. Two screws on each side make for
a very secure installation. Secure the wire to the bracket using the bracket’s wire tie tab. The drywall installers will cut the drywall to the
exact size of the bracket. (See Figure 2)
CONCEALING LOUDSPEAKER WIRE FOR A FUTURE INSTALLATION
Attach the loudspeaker wire in a loop between the ceiling joists and carefully mark the exact location of the wire on a set of plans. Ask the
general contractor to inform the drywall installers that the loudspeaker wire loops are concealed for future installations.
UNPACKING AND FINAL INSTALLATION
1. Remove the top piece of styrofoam from the box. You will find one loudspeaker bagged in a lower portion of packing. Remove the
loudspeaker from the bag. The metal grille is installed on the loudspeaker and will need to be removed. This is easily done by pulling on
the small black fabric strap.
2. Remove the loudspeaker module from the frame by turning the loudspeaker assembly counter-clockwise using the two tabs provided.
Place the loudspeaker assembly to the side when removed for installation after the frame has been mounted. Take care to place it so
that the woofer, tweeter or crossover on the rear are not damaged. (See Figure 3)
3. Insert the frame into the hole by carefully holding it with both hands and angling it slowly into the hole until the frame is flush with the
ceiling. Holding it in place carefully with one hand, use a cordless drill to begin mounting the frame.
4. Tighten the four ‘dog’ screws using a #2 Phillips bit. Use low torque and low speed or you may damage the frame. This should pull the
frame and mounting dog 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.
IMPORTANT: DO NOT OVER TIGHTEN THE SCREWS! OVER TIGHTENING THEM MAY MAKE THE GRILLE DIFFICULT TO INSTALL
5. At each loudspeaker location, route the wire through the installed frame, then separate the loudspeaker wire so that at least 2 inches of
each conductor are free. Strip away 1/4 inch of insulation from each individual loudspeaker wire.
6. Retrieve the loudspeaker module removed from the frame in step 2.
7. Press down each spring-loaded connector one at a time, insert the appropriate conductor and then release the connector. Check to be
sure that the connector is making contact with stripped wire and not the wire jacket. Gently tug on the loudspeaker wire to make sure it
is held in place. If not, repeat this procedure until it is.
IMPORTANT: DO NOT OVER TIGHTEN THE SCREWS! OVER TIGHTENING THEM MAY MAKE THE GRILLE DIFFICULT TO INSTALL
8. Insert the loudspeaker module into the frame by carefully holding it with both hands and angling it slowly into the frame until the module
is seated in the frame. Holding it in place, carefully use the same tabs used to remove it from the frame to turn it clockwise until you feel
a ‘click’, which should be approximately an 1/8th of a turn. Take care not to push against the woofer or tweeter as you are inserting the
loudspeaker module.
9. Direct the tweeters. The dual tweeter module is directed by gently pressing on the outer edge of the tweeter housing. It will move in any
direction and can be positioned independent of the woofer assembly. For enveloping surround sound, create more reflections and thus
more ambiance by directing the tweeters towards the sidewalls. (See Figure 4)
10. Direct the woofer. The woofer assembly is directed by gently pressing on one or two points of the woofer housing using the edges of
the tweeter bridge that are near the blue plastic visible at the outer edge of the woofer. It will move up to 20 degrees in any direction.
For enveloping surround sound, create more reflections and thus more ambiance by directing the woofer towards the sidewalls.
(See Figure 5)
11. Set the Treble level control. Listen to a well-recorded piece of music or movie selection at the user’s favorite listening position. Listen
for treble harshness or ringing, particularly when the loudspeakers are placed in a room without carpet. Use the -3dB Treble cut
position to correct. (See Figure 6)
12. Set the Diffuse / Direct control. Use the Diffuse setting when listening to movies and classical music. The sound will be less focused
as it is reflected along the room’s boundaries. This is the best choice, since most films are mixed using non-localized surround effects
and classical music is usually recorded in a favorable acoustic environment. Use the Direct setting when listening to discrete multi-
channel recordings that equally emphasize front and surround sounds. For multiple sets of CM730DSFX, CM750DSFX or CM760DSFX
loudspeakers, use the Diffuse setting on the Side/Rear loudspeakers for more surround effect. For the Surround Back loudspeakers, use
the Direct setting to focus the sound. (See Figure 7)
13. Install the MicroPerf grille. Start by positioning one edge of the grille slightly inside the loudspeaker. Gently work around the
loudspeaker a little at a time until the grille is fully seated. Don’t try to insert the grille fully in any one area, as this will make complete
installation more difficult. Don’t force the grille to fit as you may damage the grille if you apply too much force.
14. Connect the other end of each loudspeaker wire to the receiver (or amplifier) carefully observing polarity.
15. Turn on the home theater receiver and calibrate all loudspeakers in the system according to the receiver manufacturer’s instructions.
PAINTING THE GRILLE AND FRAME
Each CM730DSFX, CM750DSFX or CM760DSFX loudspeaker frame and flush-mount metal grille may be painted without the need for
primer. The frame may be painted prior to installation if desired.
1. Install loudspeaker frame into ceiling or wall following the previous steps 1 - 4.
2. Paint the frame of the loudspeaker.
3. Paint the grille separately from the loudspeaker frame. For best results when painting the grille, use a spray gun or airless sprayer.
Thin the paint to prevent clogging of the grille holes and apply several light coats instead of one heavy one.
4. Finish installation of the loudspeaker following the previous steps 5-15.
PAINTING INSTRUCTIONS IF FRAME AND LOUDSPEAKER MODULE ARE INSTALLED
1. Remove the smallest perforated circle from the cardboard square template. This is the paint mask that protects the loudspeaker from
paint. Gently press it into place inside the baffle.
2. Paint the frame of the loudspeaker.
3. Paint the grille separately from the loudspeaker frame. For best results when painting the grille, use a spray gun or airless sprayer.
Thin the paint to prevent clogging of the grille holes and apply several light coats instead of one heavy one.
4. Gently remove the paint mask after paint has dried by pressing in the tab in the center and carefully pulling out the mask with your
finger. Be very careful not to poke the tweeters with your finger.
5. Finish installation of the loudspeaker following the previous steps 9-15.
• Cordless drill with 1/4 – and 1/2-
inch drill bits and a 1-inch paddle
drill bit (for drilling through studs)
• Stiff wire, fish tape or glow rods
for routing cables
• Rubber gloves and protective
eyewear
• Keyhole or drywall saw
• Phillips screwdriver set
• Wire stripper
• Stud finder
• Cable ties
• Pencil
• Turn off all system power before
making any connections
• Always wear protective eyewear
when using tools
• Make sure hands are clean before
installation
• Wear gloves when working with
fiberglass insulation