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SKU: SVC-300-PAR OSD In Wall 300W Knob Volume Control, Speaker Impedance Matching White, Black, Brown Decora Style

Purchase OSD In Wall 300W Knob Volume Control, Speaker Impedance Matching White, Black, Brown Decora Style
  • SKU: SVC-300-PAR vcimmavoco1

    OSD In Wall 300W Knob Volume Control, Speaker Impedance Matching White, Black, Brown Decora Style

  • $34.99

    Compare at: $51.99 You Save $17.00

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OSD Audio's SVC300 is an impedance-matching volume control that lets you adjust the volume of a pair of speakers independently of other speakers within a whole house audio system. Ideal for areas such dining or conference rooms where you may want softer volumes or for saunas or garages where you may want higher volumes, the SVC300 maintains the full hi-fi audio frequency response with no low frequency roll-off. Equipped with the same features of volume controls that cost twice as much, the SVC300 is rated at 300 Watts peak and includes adjustable jumpers to add up to eight pairs of 8-ohm speakers simultaneously. The impedance-matching feature helps stabilize the ohm load going back to the amp or receiver to avoid overheating and damaging expensive equipment. A complete volume control kit that fits into a standard single-gang box, the SVC300 also includes the junction box, screws and assorted color trim plates (white, ivory and almond) so you can choose the color that best matches the room. This versatile whole house volume control is compatible with almost any dedicated audio zone or whole house system, and the 12-step rotary knob adjusts the volume from inaudible to loud and everything in between.

  • Decora style impedance-matching volume control for whole house audio systems and dedicated audio zones
  • Rated at 150 Watts per channel with minimal bass roll-off
  • Impedance-matching feature stabilizes the ohm load so parallel connections of multiple volume controls can be installed without damaging the amplifier
  • Front-mounted adjustable jumpers allow easy adjustment when multiple pairs of speakers are connected to a single receiver or amplifier
  • Accepts up to 14-gauge wiring and fits in a standard gang box with a depth of 2.9'Includes junction box and screws as well as white, ivory and almond trim plates to match any room d'cor
  • Precision electronics provide low distortion and a ruler flat frequency response
  • 12-step linear rotary-style knob for a wide range of listening volumes
  • Installs easily and works with almost any audio system 

What Is Impedance Protection?
Speakers are specified by impedance, which is a measurement of resistance to alternating current, and a common value for speakers 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. The SVC300 allows you to 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. Keep in mind that 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 Bisphenol A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

  • Volume Control Type: 300W Impedance Matching Rotary Knob Style
  • Power Handling: 300W Peak; 150W 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 Knob
  • Additional Colors Available: Black or Brown
  • Warranty: 5 Years
36 Questions asked
Have a Questions?

What's on your mind?

Derek • 12/17/2019, 2:17:43 PM I bought the SVC300 and have it hooked up to two of your 8 ohm outdoor speakers on channel B on my Yamaha receiver. I have 8 ohm Klipsch stereo speakers hooked up inside to channel A of my Yamaha receiver as well. The problem I have is that the outdoor speakers are much quieter than my indoor speakers even at full volume when I select A+B and I can't adjust volume levels between A and B independently through my receiver. Any suggestions?
Customer Service • 12/17/2019, 2:17:43 PM
Thanks for the response. No I haven't tried that, but I still want independent volume control outside. It's there something I could buy that would either amplify (the already amplified) signal to the outdoor speakers only or damper the indoor speakers?
john fleming • 12/17/2019, 2:17:43 PM i have a svc300 volume control. Occasionally it / the speaker is booming, would this be the svc300 volume control switch ?. I also cannot set the volume to completely silent, is this normal ? thank you.
Customer Service • 12/17/2019, 2:17:43 PM
Hi John, A volume control has nothing to do with frequency or tone that would cause the "booming" in your speaker. The volume control only regulates the current of electricity going to the speaker. However, if the actual volume control is making a vibrating sound, it may be that you are inputting too much power to it from your amp. With some of our models, like the SVC300, turning the knob down does not close the current. We do have some models, like the SVC205, that have an on/off switch that will close the current causing the sound to turn off. CS 2426
David Vidaurri • 12/17/2019, 2:17:43 PM Can this control 4 speakers.
Customer Service • 12/17/2019, 2:17:43 PM
Hi David, Yes, you can run two pairs of speaker off this but it does only have 2 channel outputs, so you will need to parallel the 2nd pair. Make sure you are running an amp/receiver that can handle two pairs on one load. Thanks! -BM 2603
Peter R • 12/17/2019, 2:17:43 PM I am thinking about replacing a couple pairs of ceiling speakers with the ICE650's. these are all going to be on my zone 2 Yamaha RX-A730. In looking at your wall switches, I want good quality sound controller but I question if I need impedance matching if I already have that feature with my Jamo ZI-8. If I don't need impedance matching in the volume controls, which one do you recommend that is also good quality. I just need round knob for single gang. Thank you.
Customer Service • 12/17/2019, 2:17:43 PM
Hi Peter, Great choice of speakers! I wouldn't, however, recommend running more than 1 pair of your Yamaha receiver's Zone 2. I believe it can only handle an 8ohm load, and an impedance matching volume control doesn't really work how you think it would in that scenario. I would contact Yamaha to be sure though. Ask them if they recommend running 2 pairs of speakers off that zone before you attempt it. If you are planning on running more than 2 pairs, then you should definitely consider getting yourself an amp to run off the Yamaha receiver to properly and safely power them. BM 2645
WayneKerr • 12/17/2019, 2:17:43 PM Can two of these be placed side-by-side in a two-gang box without overcrowding or overheating issues?
Customer Service • 12/17/2019, 2:17:43 PM
Hello Wayne, I don't believe you would have any issues with overheating, but I'm not sure they will fit in a dual gang box.