Niles Audio or SPS-6 Stereo System User Manual
Contents
1. channel RMS into 8 ohms will deliver up to 12 5W to each of the eight pairs whether you play all eight pairs or just one pair This translates into a drop in the maximum volume capability of about 9dB at the 8x setting 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 speak ers 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 STEREO VOLUME CONTROLS reduce your maximum volume substantially To solve this prob lem specify a speaker selector with a defeatable protection circuit Niles models HDL 4 HDL 6 SPS 4 or SPS 6 Then keep the protection circuit off at all times JUNCTION BOXES WMVC 100 The mounting depth of the MVC 100 is 2 9 16 When installed the unit extends 2 1 16 behind the sheetrock wall assuming 1 2 sheetrock For installation use a standard 18 cubic inch or larger junction box Suitable junction boxes are available from your Niles dealer or local electrical supply company WMVC 100E Use the PVC junction box supplied mounted atop a PVC conduit through which the wires will run TYPE OF SPEAKER WIRE We recommend 16 gauge stranded copper speaker wire for most connections and 14 gauge wire for runs longer than 80 fee2. into the oblong screw holes on the top and bottom of the volume control The oblong shape of the screw holes helps you place the volume control in a vertical position Align the screws with the threaded holes in the Figure 2 junction box Tighten the screws Loosening the using a Phillips screwdriver DO screws for a Flush Fit NOT OVERTIGHTEN If necessary loosen these screws several turns so the volume control fits flush with the faceplate 4 OHM Speaker Pairs WEATHERPROOF MUTING AMPLIFIER S MINIMUM SPEAKER LOAD IS 4 OHMS 8 OHM Speaker Pairs 6 7 8 9 10 11 12 13 14 15 16 STEREO VOLUME CONTROLS AMPLIFIER S MINIMUM SPEAKER LOAD IS 8 OHMS 8 OHM Speaker Pairs Figure 4 SPV Figure 5 Figure 6 Hate 7 WEATHERPROOF MUTING STEREO VOLUME CONTROLS 10 Set the rubber gasket inside the faceplate and be sure it is seated properly 11 Use the shorter plate screws to fasten the gasketed faceplate to the volume control DON T OVERTIGHTEN THE PLATE SCREWS WHICH COULD DAMAGE THE FACEPLATE Align all the screws in the same direction for a clean finished look OPERATION Make sure the amplifier or receiver power is OFF and set the volume to minimum N Set the volume on the volume control to maximum fully clockwise WwW If you are using a Niles speaker selection system locat
3. NILES Niles Audio Corporation www nilesaudio com 12331 S W 130 Street Miami Florida 33186 Tel 305 238 4373 Fax 305 238 0185 2003 Niles Audio Corporation All rights reserved Niles the Niles logo and Blending High Fidelity and Architecture are reg istered trademarks of Niles Audio Corporation Decora is a registered trademark of Leviton Manufacturing All other trademarks are the property of their respective owners Some of Niles products or components thereof are manufactured under one or more U S Patents foreign equivalents and or pending patents see product for details Because we constantly strive to improve our products Niles reserves the right to change product specifications descriptions and prices without notice The technical and other specifications of information contained herein is not intended to set forth all technical and other specifications of Niles products Additional information can be obtained at www nilesaudio com or by calling Niles at 1 800 289 4434 Printed in China 7 03 DS00318ACN INSTALLATION amp OPERATION GUIDE WMVC100 WMVC 100 Weatherproof Muting Stereo Volume Controls R NILES BLENDING HIGH FIDELITY AND ARCHITECTURE Pri WHER OOF MUTING STEREO VOLUME CONTROLS WEATHERPROOF MUTING STEREO VOLUME CONTROLS WMVC 100 WMVC 100E TABLE OF CONTENTS Introduction Features and Benefits Installation Considerations Installation Operation Programmin
4. WMV 100E require 12VDC power to operate the muting function of the volume control Therefore two conductor power wire must be run to each vol ume control location along with four conductor speaker wire WMVC 100 Before you install the WMVC 100 into an exist ing wall consider the possibility of hidden obstructions inside the wall such as wood and metal studs electrical telephone or other wiring plumbing and conduit 1 Install the junction box in the usual manner 2 Run all necessary wiring to the volume control Label the wires for future reference WMVC 100E 1 Run the necessary wiring up through the conduit and the opening at the base of the enclosure Label the wires for future reference 2 Mount the entire enclosure atop the PVC conduit INSTALLATION 1 Locate the 4 pin speaker wire connector plugs and remove them if they are plugged in See Figure 5 2 Strip 1 4 of insulation from the end of each wire Tightly twist the end of each wire until no frayed ends remain WEATHERPROOF MUTING STEREO 3 Use a small flathead screw Receiver dri humbrailto Saal QP river or your t umbnail to 5 all O raise the locking tabs H a exposing the holes on the MVC HUB4 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 phas
5. ame magnification 1 Count the number of pairs of 4 ohm speakers and the number CONTROLS TOOLS REQUIRED e 1 8 Standard Slotted Screwdriver e 1 4 Standard Slotted Screwdriver WEATHERPROOF In a typical application of IM volume controls a system has eight pairs of 8 ohm speakers through out the house Each pair of speakers is connected to an IM volume control with its switches set for 8x MUTING TECH TIP Wire size is expressed by its AWG American Wire Gauge of pairs of 8 ohm speakers you are connecting Count pairs of 6 ohm speakers as 4 ohm pairs e Wire Stripper N Determine whether the amplifier should see a 4 ohm load or an 8 ohm load You should find this information in the owner s manual of the amplifier es Read the correct switch position from the charts on the next page See Figure 3 if your amplifier can drive a 4 ohm load See Figure 4 if your amplifier must have an 8 ohm speaker load 4 Set the switches on all of the controls to the same position 1x 2x 4x or 8x 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 number The lower the AWG number the larger the wire Thus 12 AWG wire is physically larger than 14 AWG With eight pairs of speak ers one eighth of the amplifier s power is avail able to any pair Therefore an amplifier rated at 100W per
6. e the ON OFF button that corresponds to the speaker pair you wish to play Set it to the ON position Make sure the defeat able protection circuit is not enabled See Using Speaker Selectors with IM Volume Controls on page 4 4 Turn ON the amplifier or receiver and select a source such as the tuner or CD player v Slowly turn up the amplifier or receiver volume and set it to a comfortable not maximum listening level Don t over drive or clip your amplifier If the sound becomes muddy or distorted you have reached the limit of your amplifier s volume capability Reduce the volume at once to avoid damaging your speakers an Use the volume control to adjust the volume of the speakers to the desired listening level If all the speaker pairs in your system are equipped with Niles volume controls you can leave the amplifier or receiver volume set at one position and use the Niles controls exclusively N To mute the speakers without adjusting the volume control press the mute button To unmute speakers that have been muted press the mute button again PROGRAMMING CAPABILITY You can program individual WMVC 100 and WMVC 100E Muting Volume Controls attached to an MVC HUB4 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 To program a WMVC 100 or WMVC 100E for automatic muting o
7. g Specifications Contents j NILES INTRODUCTION The WMVC 100 and WMVC 100E are weatherproof muting stereo volume controls with a pro grammable automatic muting feature They connect between a Niles MVC HUB4 Distribution Hub and your speakers The WMVC100 is a wall mounted muting volume control designed specifically for environmental use The WVC 100E is a freestanding muting volume control mounted in a PVC junction box for use in environmental where a wall mounted muting volume control would be impractical Both models adjust the volume of remotely located speakers to which they are connected by attenuating the amplifier signal The mute button opens and closes a relay to turn those speakers on or off To assure minimal dissipation of internal power with virtually no power wasted as heat they use autoformers instead of L pads as the volume controlling element The WMVC 100 and WMVC 100E are impedance magnifying IM volume controls Unlike other brands they have additional autoformer windings that magnify the impedance of connected speakers while allowing all 12 steps to adjust the volume of the sound Switches on the PC board select these windings With the volume control providing impedance protection for your amplifier you can create systems with no additional impedance matching devices between the volume control and the amplifier In a typical application of IM controls a system has eight pairs of 8 ohm speakers throug
8. hout the house and in outdoor locations Connect each pair of speakers to an IM volume control with its switch in the 8x position eliminating the need for an external impedance matching device to protect the amplifier Even when playing all eight speaker pairs at once the amplifier runs at normal operating temperatures FEATURES AND BENEFITS The weatherproof WMVC 100 and WMVC 100E offer a number of improvements over other weatherproof muting volume controls e WMVC 100 Designed for environmental wall mount installation e WMVC 100E Enclosed in a freestanding PVC junction box designed for installations where wall mounting would be impractical e Both models A rubber gasket fits behind the faceplate during installation to seal out moisture e Allows you to mute speakers with the simple push of a button at the volume control without having to turn the volume adjustment knob e The automatic muting feature is programmable allowing certain locations such as the sauna and porch to remain muted when system activation turns on other locations such as the kitchen and pool area e An impedance magnifying switch on the front of the volume control sets the impedance of connected speakers You can magnify the speakers impedance by a factor of two four or eight Unlike other impedance matching volume control products Niles IM volume controls maintain a 12 position adjustment regardless of how much impedance magnificatio
9. ing Connect the positive terminals on the volume con Speakers trol to the positive terminals Figure 1 on the amplifier and speakers Wiring Diagram and connect the negative terminals on the volume control to the negative terminals on the amplifier and speakers To help you avoid improper phasing the connector plug is keyed Insert the smooth side of the connector plug into the smooth side of the socket Don t force the scalloped side of the con nector plug into the smooth side of the socket See Figure 5 5 Locate the 2 pin voltage connector see Figure 7 Strip 1 4 of insulation from the end of each wire Tightly twist the end of each wire until no frayed ends remain and insert each wire into the appropriate hole on the connector Use a small flathead screwdriver to tighten the screws in place VOLUME CONTROLS a Set the Impedance Magnification Switch See Figure 6 as determined by the IM charts Figures 3 and 4 N Plug the connectors into the volume control as shown in Figure 5 The inputs of the IM volume control are the con nector pins labeled AMPLIFIER The outputs are the connec tor pins labeled SPEAKERS NOTE f you reverse these connections the volume control won t function properly 8 Connect the power supply wiring between the volume control and the Niles MVC HUB4 Speaker Power Hub 9 Secure the volume control to the junction box Insert the 1 1 4 device screws
10. n you use with total attenuation gt 48dB Pop free switching between all steps e 100 percent tested electronically and acoustically for fre quency response distortion and power handling e WMVC 100 Mounting depth of only 2 9 16 Fits into stan dard 18 cubic inch one gang junction boxes e WMVC 100E Fits into PVC junction box supplied e Standard faceplate and knob included TECH TIP Some speakers have selectable impedance Before you proceed please confirm that any selectable impedance speakers in your system are properly set for the system you are installing WEATHERPROOF MUTING e Isolated left and right channel grounds ensure safety with any amplifier e May be used with 4 6 or 8 ohm speaker systems e Ideal for home and commercial sound installations e UL rated to comply with all local building codes e Installation requires only a screwdriver and wire stripper e Power handling 100W channel RMS e Frequency response 20Hz to 20kHz 1 5dB e WMVC 100 Available colors Bone and White e 10 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 STEREO VOLUME CAUTION Every speaker pair in the system must be connected to an impedance magnifying volume control and set to the s
11. r unmuting press and hold the mute button for 10 seconds An LED blinks to indicate that programming has occurred The WMVC 100 and WMVC 100E come from the factory pre programmed in the automatic mute mode WEATHERPROOF MUTING SPECIFICATIONS Audio Power Handling 100W channel RMS 200W channel peak music power Mounting WMVC 100 In wall fits into most 18 cubic inch single gang junction boxes at least 2 3 4 deep WMVC 100E Enclosed in a PVC junction box supplied Wiring Requirements 14 18 gauge two individual runs of two conductor speaker wire or one run of four conductor speaker wire Unit Dimensions 1 5 8 wide x 2 5 8 high Faceplate Dimensions WMVC 100 Faceplate 2 3 4 wide x 4 1 2 high Depth Behind Faceplate 2 9 16 STEREO VOLUME CONTROLS CONTENTS WMVC 100 e WMVC100 volume control e Standard wallplate e Knob e Device mounting screws X2 e Faceplate screws X2 e Removable speaker connector X2 e Gasket WMVC 100E e WMVC1OOE Volume Control e Knob e Device mounting screws X2 e Removable speaker connector X2 e Standard Faceplate screws X4 e Enclosure X1 e Gasket WEATHERPROOF MUTING STEREO VOLUME Figure 8 CONTROLS a Knob b Faceplate c Gasket d Volume Control e Enclosure
12. t Don t use speaker wire larger than 14 gauge because larg er wire may not fit into the connectors Never use solid core aluminum or Romex wire with an IM volume control For speaker wire runs within walls most U S states and munici palities 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 4 WEATHERPROOF MUTING STEREO VOLUME CONTROLS MOUNTING LOCATION WMVC 100 Convenient mounting locations include e Ona porch or patio wall e Near doorways e Close to a telephone WMVC 100E Convenient mounting locations include e At poolside e Near a hot tub e Near a barbecue Some states or municipalities allow installation of devices such as the MVC 100 in the same junction box as 110V devices with a low voltage partition between the devices We do not rec ommend this because speaker wires can act as an antenna for electrical noise Locating speaker wires too close to a light switch or dimmer may cause the speakers to emit a popping or buzzing sound If you must locate the IM volume control near electrical devices install it in a separate metal junction box ground the box to the electrical system ground and route the speaker wires several feet away from the electrical wiring PREPARING FOR INSTALLATION NOTE The WMVC 100 and
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