50-Watt Impedance Matching Volume Control, Decora Insert Rotary Knob
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50-Watt Impedance Matching Volume Control, Decora Insert Rotary Knob

Control the Volume of your Stereo Speakers with a Wall-Mounted Controller

Item #: 81296

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Special Price: $38.71

List Price: $53.50

Your Savings: $14.79

  • 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 50 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. It accepts up to 14-gauge wire and includes a trim plate.

  • Specifications

    Manufacturer Product No.:XVCD50P
    Power Handling:50 Watts continuous, 150 Watts peak
    Impedance Matching:Adjustable for up to 8 speaker pairs (1, 2, 4, 8 pairs)
    Attenuation:11 steps plus Off; max 42 dB
    Frequency Response:20Hz-20kHz +/-1 dB
    Speaker Terminals:14 gauge, Quick Connect (detachable)
    Mounting:Minimum 20 cu. in. J-box or Mud Ring
    Speaker Compatibility:4-, 6-, or 8-ohm speaker systems
    Certifications:UL Listed

  • 3 Reviews

    Review of 81296 Review by Reynold
    Review of 81296

    It says 5 reviews but I see only 2 five-star reviews. The negative reviews have been deleted! I don't trust this.

    Posted on 1/17/2013

    Review of 81296 Review by EDOUARD
    Review of 81296

    This was exactly the item I was looking for, installed in a few minutes and now works flawlessly to control my outdoor music. The whole family is enjoying this.

    Posted on 7/22/2012

    Review of 81296 Review by Doug
    Review of 81296

    This impedance matching volume controller did exactly what I was looking for. Simple and well constructed volume controller.

    Posted on 5/9/2011

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  • Volume controller
  • White, ivory, almond and black Decora inserts and volume knobs
  • Owner's manual
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