TECHNICAL SUPPORT IF YOU HAVE QUESTIONS ABOUT THE INSTALLATION OR OPERATION OF THIS OR ANY OTHER NILES PRODUCT, PLEASE CALL OUR TECHNICAL SUPPORT DEPARTMENT AT 1-305-238-4373 • 1-800-BUY-HIFI (1-800-289-4434). SUPPORT IS AVAILABLE WEEKDAYS 8:00 A.M. TO 7:00 P.M. EASTERN TIME WITH THE EXCEPTION OF HOLIDAYS. Left and Right speakers I N S TA L L AT I O N G U I D E 8' Figure 1. Typical placement for a surround system CM730DSC Figure 2. New construction bracket Figure 6. Treble level control Figure 3. Installing the loudspeaker Figure 4. Tweeter adjustment Figure 5. Woofer adjustment CM750DSC Figure 7. Dialog level control SPECIFICATIONS Model Recommended Normal Amplifier Power Impedance Frequency Response Sensitivity Frame Hole Cut-Out Depth Behind Dimensions Dimensions Ceiling 55Hz - 21kHz +/-3dB 90 dB with 2.83 V pink noise input measured at 1 meter on axis 11 inches (28cm diameter) 9-3/4 inches (25cm diameter) 5-3/4 inches (14.6cm diameter) 55Hz - 21kHz +/-3dB 90 dB with 2.83 V pink noise input measured at 1 meter on axis 11 inches (28cm diameter) 9-3/4 inches (25cm diameter) 5-7/8 inches (15cm diameter) CM730DSC Twist and Lock™ mechanism with Directed Soundﬁeld patented fully pivoting assembly featuring one 7" Polypropylene woofer with butyl rubber surround and one pivoting 1" UltraSilk® tweeter with ﬂuid cooling. 10 to 125 watts per channel 8 ohm nominal; 6 ohm minimum CM760DSC CM750DSC Twist and Lock™ mechanism with Directed Soundﬁeld patented fully pivoting assembly featuring one 7" TCC™ (talc, carbon and ceramic) woofer with butyl rubber surround and one pivoting 1" Teteron® tweeter with ﬂuid cooling. 10 to 125 watts per channel 8 ohm nominal; 6 ohm minimum BLENDING HIGH FIDELITY AND ARCHITECTURE® CM760DSC Twist and Lock™ mechanism with Directed Soundﬁeld® patented fully pivoting assembly featuring one 7" Interlaced glass ﬁber woofer with butyl rubber surround and one pivoting 1" Teteron® tweeter with ﬂuid cooling. 10 to 150 watts per channel 8 ohm nominal; 6 ohm minimum 48Hz - 21kHz +/-3dB 90 dB with 2.83 V pink noise input measured at 1 meter on axis Niles Audio Corporation 11 inches (28cm diameter) 9-3/4 inches (25cm diameter) 5-7/8 inches (15cm diameter) 1 2 3 3 1 S . W. 1 3 0 S t r e e t M i a m i , F l o r i d a 3 3 1 8 6 1-305-238-4373 1 - 8 0 0 - B U Y- H I F I – w w w. n i l e s a u d i o . c o m ©20 08 Nile s Audio Corpo ra tio n . Al l ri gh ts re se r ved . Nil es a n d t h e Nil e s l o go s are re gi ste re d t ra de ma rk s of Nile s Audio Corpora tio n . Tw is t an d L o ck an d Mi cro P e rf a re tra de m ark s of Ni le s Audi o Co rpo ra ti o n . All othe r trade marks are th e p ro pe rty o f t h ei r re spe ct ive o wn er s. U . S . P ate n t # 6, 683, 963. D S 0 0 5 3 8 C HIGH PERFORMANCE CEILING LOUDSPEAKERS CONGRATULATIONS! Thank you for choosing a CM730DSC, CM750DSC or CM760DSC 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 one CM730DSC, CM750DSC or CM760DSC loudspeaker; 1 Aluminum MicroPerfTM Grille and 1 cardboard paint mask/hole cutout template. INSTALLATION CONSIDERATIONS We recommend using the following tools and material to install your Niles CM loudspeaker: • Cordless drill with 1/4 – and 1/2inch 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 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. • Wire stripper NEW CONSTRUCTION INSTALLATION • Stud ﬁnder INSULATING THE WALL CAVITY • Cable ties If feasible, ﬁll the wall cavity with insulation at this point. • Pencil MOUNTING THE NEW CONSTRUCTION BRACKET Before starting the installation, please observe the following precautions: • Turn off all system power before making any connections • Make sure hands are clean before installation • Always wear protective eyewear when using tools • Wear gloves when working with ﬁberglass insulation 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 CM730DSC, CM750DSC or CM760DSC center channel loudspeaker is 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 CM730DSC, CM750DSC or CM760DSC is best placed as close to the video display as possible, centered as seen from the listening position. Avoid installing the loudspeaker near corners to prevent a “boomy” or diffracted sound. The CM730DSC, CM750DSC or CM760DSC loudspeaker 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) The optional CM700DS BKT can be used with the CM730DSC, CM750DSC or CM760DSC loudspeaker. 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 loudspeaker 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 loudspeaker. 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. EXISTING CONSTRUCTION INSTALLATION 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) IMPORTANT: BEFORE YOU CUT INTO ANY WALL, REVIEW THE PRIOR SECTION ON LOUDSPEAKER PLACEMENT WHEN SELECTING THE LOCATION FOR YOUR LOUDSPEAKERS. 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. 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. 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. 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. 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 tweeter. The tweeter is directed by gently pressing on the outer edge of the tweeter housing. It will move up to 20 degrees in any direction and can be positioned independent of the woofer assembly. For critical listening, direct the tweeter towards the user’s favorite listening position. For surround sound or low volume background listening, create more reﬂections and thus more ambiance by directing the tweeter 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 critical listening, direct the woofer assembly towards the user’s favorite listening position. For surround sound or low volume background listening, 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 movie or piece of music 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. Listen for dull or mufﬂed upper frequencies, particularly when the loudspeakers are installed in an area with thick carpet or fabric wall coverings. Use the +3dB Treble boost position to correct. (See Figure 6) 12. Set the Dialog level control. Listen to a well-recorded movie featuring mostly dialog at the user’s favorite listening position. Listen for thin or less than full voices, particularly when the loudspeaker is placed in the middle of a ceiling. Use the +3dB Dialog boost position to correct. (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 manufactures instructions. PAINTING THE GRILLE AND FRAME The CM730DSC, CM750DSC or CM760DSC 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. Do not attempt to paint the plastic and cloth grille. 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.
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