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Control the Volume of your Stereo Speakers with a Wall-Mounted Controller
50W Impedance Matching Volume Control, Decorator Style Rotary Knob
50-Watt Impedance Matching Volume Control, Decora Insert Rotary Knob
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Sample Wiring Diagram
50-Watt Impedance Matching Volume Control, Decora Insert Rotary Knob
Item# 81296
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  • 50-Watt RMS capacity
  • Rotary knob spins right for increased volume and left for decreased volume
  • Allows up to 16 speakers to be connected to one amplifier
  • Easy to set impedance match level
  • Includes decora-style insert, trim plate and knob in white, ivory, almond and black

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 50-Watt Impedance Matching 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. A compact 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, almond and black Decora inserts and volume knobs to match your home d├ęcor.


What's Included

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



    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

    Important notes:
    Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.
    Manufacturer contact information: Xantech LLC, Tel: (800) 843-5465 Ext 355


    Sample Wiring Diagram       
    Sample Wiring Diagram       


    6 Ratings
    5 star: 50%  (3)
    4 star: 0%  (0)
    3 star: 17%  (1)
    2 star: 0%  (0)
    1 star: 33%  (2)
    Average Customer Rating
    (6 customer ratings)
    Share your thoughts with other customers
    Reynold -- New York   1/17/2013
    It says 5 reviews but I see only 2 five-star reviews. The negative reviews have been deleted! I don't trust this.
    EDOUARD -- gatineau, QC   7/22/2012
    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.
    Doug -- Albany   5/9/2011
    This impedance matching volume controller did exactly what I was looking for. Simple and well constructed volume controller.


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