I N S TA L L AT I O N G U I D E HIGH-POWER MUTING STEREO VOLUME CONTROL MVC100 MVC100R DS00317C-0 MVC100_R.
CONGRATULATIONS! Thank you for choosing MVC 100 High-Power Muting Stereo Volume Control from Niles. With proper installation and operation, you should 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.
INTRODUCTION The MVC 100 is a high power, muting stereo speaker volume control that connects between the speaker-level output of an amplifier, speaker selector, or a Niles VCS HUB4 distribution hub and a pair of speakers. A perfect application for the MVC 100 is adjusting the volume of, or muting and unmuting remotely located speakers. The MVC 100 adjusts the volume of speakers connected to it by attenuating the amplifier signal.
FEATURES AND BENEFITS The MVC 100 offers a number of improvements over other volume controls: • Interchangeable Decora-style inserts for fast, easy color change. Inserts and knobs (sold separately) are available in a variety of colors. • A universal impedance-magnifying design enables the MVC 100 to act as both a stereo and an impedance magnifying volume control. You can magnify the speakers’ impedance by a factor of two, four, or eight.
FEATURES AND BENEFITS (CONTINUED) • Ideal for home and commercial sound installations. • UL rated to comply with all local building codes. • Available colors: almond, black, bone, brown, and white. • Installation requires only a screwdriver and wire stripper. • Mounting depth of only 2-9/16". Fits into standard 18-cubic-inch one-gang junction boxes. • Power handling: 100W/channel RMS. • Frequency response: 20Hz to 20kHz ±2dB. • Ten years parts and labor warranty.
INSTALLATION CONSIDERATIONS CALCULATING THE IMPEDANCE MAGNIFICATION SETTING Use the following instructions and the accompanying charts to select the correct switch setting for the number and type of speakers in your system. CAUTION! EVERY SPEAKER PAIR IN THE SYSTEM MUST BE CONNECTED TO AN IMPEDANCE-MAGNIFYING VOLUME CONTROL AND SET TO THE SAME MAGNIFICATION. 1.
INSTALLATION CONSIDERATIONS (CONTINUED) LIMITATIONS IN VOLUME WITH HIGH MAGNIFICATION SETTINGS Using an 8x setting limits the power to each speaker pair to one-eighth of the amplifier’s output. In a typical application of IM volume controls, a system has eight pairs of 8-ohm speakers throughout the house and in adjacent outdoor locations. Each pair of speakers is connected to an IM volume control with its switches set for 8x.
INSTALLATION CONSIDERATIONS (CONTINUED) USING SPEAKER SELECTORS WITH IM VOLUME CONTROLS Although IM controls provide volume and on/off at the volume-control location, they do not give you central control of speakers playing throughout the house. Speaker-selection systems give you central control, but some speaker selectors have non-defeatable impedance-protection circuits. Combining IM controls with such a selector will reduce your maximum volume substantially.
INSTALLATION CONSIDERATIONS (CONTINUED) TYPE OF SPEAKER WIRE (CONTINUED) aluminum, or Romex wire with an IM volume control. For speaker-wire runs within walls, most U.S. states and municipalities require a special type of speaker wire with a specific CL fire rating, such as CL-2 or CL-3. Consult your Niles dealer, building contractor, or local building-inspection department if you aren’t sure what kind of wire is best for your application.
INSTALLATION CONSIDERATIONS (CONTINUED) CONVENIENT MOUNTING LOCATIONS INCLUDE: • Near doorways. • Near a desk. • At your bedside. • Close to a telephone. • Near other wall-mounted controls. DECORA® FACEPLATES The MVC 100 is designed to use standard and Decora-style faceplate mounting hardware. You can combine multiple Decorastyle modules (if all are low-voltage controls) within one Decora faceplate (up to six-gang) with color-matched plate screws.
INSTALLATION CONSIDERATIONS (CONTINUED) CHANGING THE COLOR OF THE KNOB AND THE DECORA INSERT (CONTINUED) 1. Obtain the appropriate knob and Decora-style insert in the desired color from your Niles dealer. 2. Pull the knob off the shaft. See Figure 1 3. Next, locate the two plastic mounting tabs at the top rear of the Decora-style insert. Using two fingers, simultaneously press both tabs down (towards the center of the insert) and forward (away from you) until the insert pops free from its mounting slots. 4.
INSTALLATION CONSIDERATIONS (CONTINUED) CHANGING THE COLOR OF THE KNOB AND THE DECORA INSERT (CONTINUED) 5. Locate the new knob. Align its flat side to the flat side of the shaft, and push the knob onto the shaft. Holding the unit as shown in Figure 1, check the alignment of the knob by turning it through all positions. PREPARING FOR INSTALLATION NOTE: THE WMVC 100 AND WMV 100E REQUIRE 12VDC POWER TO OPERATE THE MUTING FUNCTION OF THE VOLUME CONTROL.
INSTALLATION 1. Locate the 4 pin speaker connector plugs (and remove them if they are plugged in). 2. Strip 1/4" of insulation from the end of each wire. Tightly twist the end of each wire until no frayed ends remain. 3. Use a small flathead screwdriver or your thumbnail to raise the locking tabs, exposing the holes on the removable connector plug. 4. Insert each wire into the appropriate hole on the removable connector plug, and snap the locking tab down. NOTE: MAINTAIN PROPER PHASING.
INSTALLATION (CONTINUED) Receiver 12VDC MVC HUB4 Speakers Figure 3. Wiring Diagram 12 DS00317C-0 MVC100_R.
INSTALLATION (CONTINUED) AMPLIFIER’S MINIMUM SPEAKER LOAD IS 4 OHMS AMPLIFIER’S MINIMUM SPEAKER LOAD IS 8 OHMS 8 OHM Speaker Pairs 0 0 1 4 OHM Speaker Pairs 1 2 1x 2x 2 3 3 4 4x 5 6 7 8 9 10 11 8x 8 OHM Speaker Pairs 12 13 14 15 0 16 4 OHM Speaker Pairs 0 1 2 1 2 3 4 5 6 7 8 4x 1x 2x 2x 4x 4x 8x 3 4 4 5 6 7 Figure 4 Figure 5 8 (CONTINUED ON NEXT PAGE) NILES AUDIO CORPORATION – 1-800-BUY-HIFI DS00317C-0 MVC100_R.
INSTALLATION (CONTINUED) Figure 6 14 DS00317C-0 MVC100_R.
INSTALLATION (CONTINUED) 6. Set the Impedance Magnification Switch (See Figure 7) as determined by the IM charts (Figures 4 and 5). 7. Plug the connectors into the volume control as shown in Figure 6. The inputs of the IM volume control are the connector pins labeled AMPLIFIER. The outputs are the connector pins labeled SPEAKERS. NOTE: IF YOU REVERSE THESE CONNECTIONS, THE VOLUME CONTROL WON’T FUNCTION PROPERLY. 8.
OPERATION 1. Make sure the amplifier or receiver power is OFF and set the volume to minimum. 2. Set the volume on the volume control to maximum (fully clockwise). 3. If you are using a Niles speaker-selection system, locate the ON/OFF button that corresponds to the speaker pair you wish to play. Set it to the ON position. Make sure the defeatable protection circuit is not enabled. See USING SPEAKER SELECTORS WITH IM VOLUME CONTROLS, on page 6. 4.
OPERATION (CONTINUED) 8. To turn OFF the speakers, turn the knob on the volume control fully counter-clockwise, or press the Mute button. The Mute button will change from Green to Red, indicating the local speakers are Muted. PROGRAMMING MUTING VOLUME CONTROLS You can program individual Niles Muting Volume Controls, allowing certain locations (such as the guest bedroom and porch) to remain muted when system activation turns on other locations (such as the kitchen and family room).
SPECIFICATIONS . Audio Power Handling 100W/channel RMS. 200W/channel peak music power. Unit Dimensions 1-5/8" wide x 2-5/8" high Mounting In-wall, fits into most 18-cubic-inch single-gang junction boxes at least 2-3/4" deep. Wiring Requirements 14-16 gauge, two individual runs of twoconductor speaker wire, or one run of four-conductor speaker wire. Faceplate Dimensions Faceplate: 2-3/4" wide x 4-1/2" high Depth Behind Faceplate 2-9/16". IR Wiring Requirements Individual home-run of category 5 cable.
CONTENTS MVC100R MVC 100 • MVC100IR volume control X1 • MVC 100 Volume Control • Snap-on Decora color insert X1 • Snap-on Decora color insert • Blank Decora wallplate X1 • Knob • Knob X1 • Device mounting screws X2 • Device mounting screws X2 • Removable speaker connector X2 • Faceplate screws X2 • Removable speaker connector X2 NILES AUDIO CORPORATION – 1-800-BUY-HIFI DS00317C-0 MVC100_R.
a (a) Electrical Box (b) Speaker Wire (c) MVC100IR Volume Control (supplied) (d) Snap-on Color Insert (supplied) (e) Knob (supplied) (f) Device Screws (2 supplied) (g) Decora Wallplate (supplied) (h) Faceplate Screws (2 supplied) d b c e f Figure 10 g h 20 DS00317C-0 MVC100_R.
NOTES ____________________________________________________________________________________________ ____________________________________________________________________________________________ _ _ _ _ _ _ _ NILES AUDIO CORPORATION – 1-800-BUY-HIFI DS00317C-0 MVC100_R.
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