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80-Watt Impedance Matching Stereo Speaker Volume Control

Wall-Mounted Impedance Matching Volume Controller for your Stereo Speakers Includes White, Ivory and Almond Change Kits

Item #: 8262

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Special Price: $22.84

List Price: $34.99

Your Savings: $12.15

  • Details
  • Specs
  • Reviews
  • What's Included
  • 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.

  • Specifications

    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

  • 5 Reviews

    Review of 8262 Review by BENJAMIN
    Review of 8262

    need a intallation person

    Posted on 3/13/2010

    Review of 8262 Review by BOB
    Review of 8262

    Merry Christmas!

    Posted on 12/23/2009

    Review of 8262 Review by BYRON
    Review of 8262

    Easy to install and they work as advertised. A great convenience in our four story house.

    Posted on 6/7/2009

    Review of 8262 Review by GREGG
    Review of 8262

    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.

    Posted on 6/6/2009

    Review of 8262 Review by VICTOR
    Review of 8262

    Wasn't clear in the website write up that this unit was not intended for one set of speakers.

    Posted on 9/11/2008

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  • 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
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