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Home / Product Category / Whole House Audio / Volume Controls / In-Wall Volume Controls / SVC205 In-Wall Impedance Matching Volume Control with On/Off Switch

SVC205 In-Wall Impedance Matching Volume Control with On/Off Switch

Product code: OSD-SVC205

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OSD Price: $34.95
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Features & Specifications

The OSD Audio - JAZZ Audio SVC205 is a Self-Impedance Matching Volume Controller with an on/off switch. Volume controls do not add gain (volume) to your speakers; they 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 almost inaudible levels. The SVC205 let's you turn sound off completely.

• Control volume from any room
• Low distortion and ruler flat frequency response
• All installation materials included
• Front-mounted setting switch and on/off switch


Other Product Info

There are two types of volume controller - Impedance matching and Non-impedance matching. If you connect your speaker parallel to the receiver or connect the speakers into an impedance protection speaker selector, use impedance matching volume controller. If you connect just one pair of speaker directly to the receiver or your speakers are connected directly into an impedance matching speaker selector, use regular volume controller.
Quality is critical to the successful sonic performance of any whole house audio system. After all, it’s about how the system sounds and how well it works. From front to back, our pro-install series is built with close attention to performance, reliability and durability. The result is a blend of transparency and functionality, with low distortion and ruler flat frequency response. We bring you seamless control for every room in the house.


 Product Information


By Shawn Goodspeed from Maryland on May 1, 2012
I am looking to hook up 2 zones each with it's own SVC205. Do I have to run through a speaker selector out of the receiver or can I just wire both into the back of my receiver into the same B speaker terminals. Thanks for any help.
By Customer Service - Q&A on May 2, 2012

HI Shawn:

The SVC205 will work perfect for your application. There would no problem connecting both zones in parallel to the B output of your receiver. Set the impedance matching to 1/2x on each of the Volume controls. The SVC205 will provide the ability to shut off each zone at the volume control, no need for a speaker selector.


By Robert from Cleveland, Ohio on January 17, 2013
When using multiple volume controls with the on/off switch, can all be turned off at the same time? How is the speaker impedance affected?

By Customer Service - Q&A on January 20, 2013

Hi Robert,
Most systems utilizing impedance matching volume controls are set up for worse case scenario where all zones are active. If you have four zones with a single pair of speakers per zone, your setting is 4X. If you turn off two of the four zones, you are still covered. Note, when you use impedance- matching volume controls with a speaker selector, you need to make sure the protection switch on the speaker selector is disabled (turned off, in the out position). Let the volume controls do the work. One of the disadvantages to the impedance-matching volume controls is you cannot turn them off at the volume control itself so even though you cannot hear anything once it has been turned down (counterclockwise), it still is absorbing energy and affecting the impedance. In this case, it is recommended to turn the volume control off at the respective zone of the speaker selector. If you are using the SVC205 in the zone, it features a on/off button that totally disconnects the signal right at the volume control. With our high current amplifiers like the OSD200 or OSD300, you can set up your impedance settings at a lower value (2x for four pairs as an example) so you actually increase your audio output. Utilizing the SVC205 volume controls will be best for any application versus the standard SVC models. Good luck!

TL/MA - 1551

By Bill from Chicago, IL on May 23, 2012
I just purchased two of these and can't seem to locate the impedance match jumper referred to in the description. Where is it on this SVC205 model?
By Customer Service - Q&A on May 23, 2012

Hi Bill:

The setting switch is located under the Knob. You need to remove the knob and then loosen the nut. You have choice of 2/4/8, set it to the desired setting then tighten the nut and put the knob back.


By Darren from Atlanta, GA on November 23, 2012
I am currently building a house and am planning on using 6 of these volume controls to control five different 2 speaker zones and one 4 speaker zone. I will eventually add an external amp to power all zones, but right now I'm going to run all zones off of the second powered zone on my Onkyo TX-NR809 receiver (135 WPC). Are there any issues with this setup (besides probably being underpowered)? I am assuming that by using these volume controls, I do not need an external speaker selector.
By Customer Service - Q&A on November 23, 2012

Hi Darren,

In most cases, when you use a speaker selector along with impedance-matching volume controls, the speaker selector offers a way to organize or combine all your wires (in parallel) and have a single set of wires to connect to your receiver (your channel 6 and 7). In this setup, you turn the protection switch off on the speaker selector, allowing the impedance-matching volume controls do their magic. Since standard impedance volume controls do not turn the zone off when you turn the volume down below audible levels, it just sits there soaking up the current. That’s why we recommend using the on-off on the speaker selector. Choosing the SVC205 speaker selectors gives you the ability to turn the zone on or off in the respective room. The SVC205 eliminates one of the reasons for going with a separate speaker selector. However, what do you do with all those conductors coming back to your equipment rack? Check out the SPW8 under Audio Video Wall Plates. This will allow you to connect and organize all incoming wires, 20 conductors from five rooms and eight conductors coming from Zone 6. The Onkyo TX-NR809 is a beast (great choice) with lots of power out. I am not sure if 7 pairs of speakers are advisable on the internal amp which still has to share with the other five channels. My suggestion is to look at our AMP200 or AMP300 to connect to you Room 2 Pre-amp output. Then connect your SPW8 and SVC205s. I hope that helps.

TL/MA - 1404

By Ben from Tucson on January 9, 2013
Can I used this product outside if I put it in a watertight enclosure?
By Customer Service - Q&A on January 9, 2013

Hi Ben,
You can use this volume control outdoors but you’ll need a waterproof box, such as this unit we offer.

Product Reviews

SVC205 In-Wall Impedance Matching Volume Control with On/Off Switch
5 Stars based on 3 Review(s)
Washington, D.C.
5 Stars
I would recommend this item to a friend.

So far so good
September 26, 2013
I purchased this switch because I wanted the on-off control in addition to adjusting the volume. I looked on the market and this was the only one I could find which was reasonably priced. Wired it up with no problems and seems to work well with my Sonos system. I had plenty of room inside my wall for the switch to fit and its wires. I will be purchasing several more for my home to wire them up.

Tampabay, FL
5 Stars
I would recommend this item to a friend.

Very Unique product!!
September 23, 2013
Initially, the product was out of stock. I was finally able to order it and it was delivered as promised. I understand how they could run out of this product as it is awesome! This device has made my home audio to easily be controlled from each area.

Indio, CA
5 Stars
I would recommend this item to a friend.

Simply perfect-great service
June 20, 2013
OSD's service is awesome. I order this product on a Tuesday evening and it was at my doorstep on Thursday morning (I live near Palm Springs). I just wish I would have found OSD sooner!!
Simple to connect and install.
It was a tight fit due to the depth of the product. I was able to move the wires as the house was prewired for out-door speakers, and it fit just fine.