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Wall-Mounted Impedance Matching Volume Controller for your Stereo Speakers Includes White, Ivory and Almond Change Kits
80-Watt Impedance Matching Stereo  Speaker Volume Control
80-Watt Impedance Matching Stereo Speaker Volume Control
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White Ivory Almond
80-Watt Impedance Matching Stereo Speaker Volume Control
Item# 8262
Free shipping on orders over $175 - See Details


  • 80-watt RMS capacity
  • Allows from two pairs to 32 pairs of speakers to be connected to one amplifier
  • Easy to set impedance match level
  • Provides 'pass-thru' terminals for series cable runs
  • Includes decora-style insert, trim plate and knob in white, ivory and in almond

Essential Info

If you have a multi-room audio system, you can control the volume of speakers in individual rooms by installing wall-mounted volume adjusters in each zone. If you are running more than one pair of speakers from the same amplifier speaker outputs, this impedance matching volume control will allow you to compensate for the impedance drop of using multiple sets of speakers in parallel. The 80-Watt Impedance Matching Stereo Speaker Volume Control wires between your amplifier/receiver and the speakers, letting you adjust the speaker volume with the soft touch 12 step rotary attenuation knob. Smaller size and removable terminal blocks that accept up to 14-Gage wire make this volume controller an easy install. This product comes with the convenience of white, ivory and almond decora inserts, trim plates and volume knobs.

Please Note: This volume control is NOT designed for one pair of speakers. Depending on your configuration, and whether or not you are using a 4-Ohm or 8-Ohm amplifier and/or speakers, this volume control can handle from two pairs to 32 pairs, of speakers.


What's Included

  • Volume control
  • White decora-style insert
  • White wall plate
  • White Knob
  • Ivory decora-style insert
  • Ivory wall plate
  • Ivory Knob
  • Almond decora-style insert
  • Almond wall plate
  • Almond Knob
  • More Info

    Normally, most amplifiers can easily drive between four and 16 ohms of speakers. With each speaker added to an amplifier, the impedance level drops by half. If you hook two 8-ohm speakers up to an amplifier in parallel, the amplifier actually sees an equivalent resistance of 4-ohms. Hooking three pairs to one amplifier, the equivalent impedance is 2.6 ohms, which is too low for most amplifiers to operate properly. For the engineers in the crowd, the most commonly used formula in the speaker industry is 1/R(total) = 1/R1 + 1/R2 + 1/R3 + etc. (R is the resistance of a speaker).

    When this Impedance Matching Volume control is used between a set of speakers and an amplifier, the volume control can present a higher impedance level for the amplifier to see. Once all the higher impedance volume controls are added up, you're back to a safe level for your amplifier.

    Use this volume control in parallel with up to 16 pairs of speakers. You can set the unit to provide an impedance load of 16, 32, 64 ohms, etc. At 16 ohms you can wire 2 pairs of speakers in parallel and still have an 8-ohm load for your amplifier. At 64 ohms you can wire 8 pairs of speakers and provide a 4-ohm load and so on. A jumper on the volume control allows easy setting of the volume control's impedance level.

    The volume control has a frequency response of 20 - 20,000Hz response and supports up to 80 watts RMS per channel. The volume control has 12 volume steps and the last position is a mechanical off so no sound will come from your speakers when the volume control is turned off. Accepts up to 14-gauge wire and includes a trim plate.



    Manufacturer Product No.:NX-VM803C
    Number Of Speakers:8 pairs with a 8 ohm amp, 32 pairs with a 4 ohm amp.
    Wattage:80 watts
    Frequency Response:20 - 20,000Hz
    Volume Steps:12
    Max Wire Size:14-gauge


    White  Ivory  Almond   
    White  Ivory  Almond   


    13 Ratings
    5 star: 46%  (6)
    4 star: 23%  (3)
    3 star: 8%  (1)
    2 star: 15%  (2)
    1 star: 8%  (1)
    Average Customer Rating
    (13 customer ratings)
    Share your thoughts with other customers
    BENJAMIN -- malibu, CA   3/14/2010
    need a intallation person
    BOB -- seattle, WA   12/24/2009
    Merry Christmas!
    BYRON -- chicago, IL   6/8/2009
    Easy to install and they work as advertised. A great convenience in our four story house.
    GREGG -- tupelo, MS   6/7/2009
    This seems to be a very high quality product. There is no static when operating the controls (I bought two), and my system's sound quality is unimpaired. Perhaps the greatest feature is the relatively compact size of this control, allowing me to easily fit it and some excess speaker wire in the wall box. This is a challenge and is sometimes even impossible with other controls. Note that my wall boxes were still larger than some that are frequently installed in homes. As others have pointed out, a limitation of this product is that two are required. It can only be installed with a minimum of two pairs of speakers, and won't work with just a single pair. This is a bit of a design flaw in my opinion, but at least the product works for me in my current system configuration. One other potential problem (although it may be what allows for the compact size) is the 80-Watt rating. If I ever have to replace my classic Yamaha 80 Watt stereo amp, it will likely be with one of higher-power, meaning I may have to replace these volume controls, too.
    VICTOR -- atlanta, GA   9/12/2008
    Wasn't clear in the website write up that this unit was not intended for one set of speakers.

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