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    SKU: VMS-100-PAR

    OSD VMS100In Wall 100W Slider Volume Control, Speaker Impedance Matching (White, Black, Brown) Decora Style

    Purchase OSD In Wall 100W Slider Volume Control, Speaker Impedance Matching White, Black, Brown Decora Style
    • Outdoor Speaker Depot SKU: VMS-100-PAR vmimmaslvoco
    • $28.84

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    Lifetime Tech Support


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    OSD Audio’s VMS100 is an impedance-matching volume control for adjusting the volume of a pair of speakers within a whole house audio system. Ideal for dining rooms, saunas, porches or other areas of the house where you want to add sound, the VMS100 maintains the full hi-fi audio frequency response with no low frequency roll-off and is equipped with the same features of volume controls that cost twice as much. Rated at 100 Watts peak, the volume control includes adjustable jumpers to add up to eight pairs of 8-ohm speakers simultaneously, and the impedance-matching feature helps stabilize the ohm load going back to the amp or receiver to avoid overheating. This is a complete volume control kit that fits into a standard single-gang box and includes the VC, junction box, screws and assorted color trim plates (white, ivory and almond) so you can choose the color that best matches the room. Compatible with almost any dedicated audio zone or whole house system, the electronics inside the VSM100 are designed with a ruler-flat frequency response while the 12-step slider provides noise-free volume control and a wide range of listening volumes.

    • Decora style impedance-matching volume control for whole house audio systems and dedicated audio zones
    • Rated at 100 Watts peak with minimal bass roll-off
    • Impedance-matching helps stabilize the ohm load to avoid overheating
    • Accepts up to 14-gauge wiring and fits in a standard gang box with a depth of 2.9”
    • Includes junction box, screws and white, ivory and almond trim plates to match any room décor
    • Precision electronic design provides low distortion and a ruler flat frequency response
    • 12-step linear slider for pop-free control and a wide range of listening volumes
    • Installs easily and works with almost any audio system
    What Is Impedance Matching Volume Control?
    Impedance is a measurement of resistance to alternating current. Speakers are specified by impedance, and a common value is 8 ohms. When you’re connecting multiple speakers to a receiver or amplifier, you need to stay above the amp’s minimum load requirements because going below the impedance rating can overheat or even damage expensive equipment. Volume controls such as the VMS100 have selectable impedance so you can match the impedance with the number of speakers being controlled with the capabilities of your amp. A basic multi-room system will typically have an amplifier/receiver, a speaker selector, four to eight pairs of speakers, and volume controls. Impedance-matching volume controls feature three settings depending on how many speakers you are connecting. For one to two pairs of 8-ohm speakers, the setting is 1/2x; for three or four pairs of 8 ohm speakers, the setting is 4X. Volume controls do not add gain (volume) to your speakers but simply attenuate the volume up or down. During setup, you'll set the source volume to its optimum level, then the volume control turns the sound down to inaudible levels.

    Warning: California's Proposition 65


    This product can expose you to chemicals, including vinyl chloride, which is known to the State of California to cause cancer. For more information, go to

    • Volume Control Type: 100W Impedance Matching Slider Style
    • Power Handling: 100W Peak; 50W RMS Per Channel
    • Frequency Response: 20Hz - 20kHz
    • Total Attenuation: 52 dB (Max)
    • Steps: 12 (Make Before Break)
    • Impedance Matching for 1/2, 4, 6, or 8 Pairs of Speakers
    • *Can be Used as Non-Impedance Matching if Leaving Default on Jumper Setting at 1X
    • Wiring Requirement: Up to 14 Gauge Wire
    • Removable Input and Output "Quick Connect" Phoenix Connectors
    • Fits in a Standard Single Gang Box - See LV1 for Mounting Bracket
    • Unit Dimensions: (L x H x D) 1.62" x 2.5" x 2.5"
    • What's Included: White, Ivory and Almond Plates, Inserts, Screws, and Slider
    • Additional Colors Available: Black or Brown
    • Warranty: 5 Years
    31 Questions asked
    Have a Questions?

    What's on your mind?

    William • 12/17/2019, 2:17:43 PM I have only one channel wired input for one controller with two speakers, can the VMS 100 be wired in such a way to allow the left and right channel in the one input? Hope this is clear.
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi William, I'm not sure whether you're referring to a channel as a left speaker or right speaker, or if you're meaning a zone, as in left AND right speaker. Typically a channel is one speaker and a zone is two speakers, therefore one zone is two channels. Thus, the VMS100 has an input connection for both the left and right channels. So you would take either a 4 conductor wire from your amp/receiver into the left and right input on the volume control, or you would run two 2 conductor wires from amp/receiver to volume control. Now, if you're asking if you can run two wires into one single speaker input on the volume control, the answer is no. If your amp can run in Mono, then you can run a single wire into one channel on the control, but not two wires. Hope that makes sense. Thanks. CS 2423
    Kevin • 12/17/2019, 2:17:43 PM Hi, I have Denon AVR 2309, 130W per channel. Planning to use zone 2 to drive 2 pairs of 8ohm speakers, each pair with a dedicated VMS volume controller. Would the VMS 100 work given the per-channel 'peak' power is 130W from the receiver?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Kevin, You would need to step up to the VMS-300 to handle that kind of power. The VMS-100 can only handle 100 watts peak. The VMS300 will have no problem handling that, and I'm pretty sure the cost difference is just a few dollars. Thanks! -BM 2615
    stan • 12/17/2019, 2:17:43 PM can two of these volume controls fit side by side in a double gang box?? (the blue plastic electrical boxes) thanks
    Customer Service • 12/17/2019, 2:17:43 PM
    We're not entirely sure here, but we don't see why not. It may depend on the brand of box. Just make sure the dimensions of the box will fit the dimensions of two of the volume controls. Will you still be using the front plates that come with our volume controls? BM 2634
    Petro • 12/17/2019, 2:17:43 PM I have 3 vms100 VCs and 3 pair of 8ohm speakers connected to each of its own VC. What is the correct impedence setting I need to set for each VC? 2x or 8x?
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Petro, You want to set each volume control to 4x actually. BM 2644
    Rhys • 12/17/2019, 2:17:43 PM I am connecting this to a Sonos Connect:AMP and a pair of MK850 speakers. Which setting should I use? (2/4/8/etc?)
    Customer Service • 12/17/2019, 2:17:43 PM
    Hi Rhys, You want to set it to 1/2x. How many watts are outputting from your connect amp? BM 2687