SKU: OSD-SVC205
OSD SVC205 In-Wall Impedance Matching Volume Control with On/Off Switch
The OSD Audio SVC205 is a self-impedance matching in-wall 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 is unique in that it let's you turn sound off completely.
Features
- Control volume from any room
- Low distortion and ruler flat frequency response
- All installation materials included
- Front-mounted setting switch and on/off switch
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 SVC 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
Warning:
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 www.P65Warnings.ca.gov.
- Volume Control Type: 300W Impedance Matching Knob Style w/ On/Off Switch
- Power Handling: 300W Peak; 100W RMS Per Channel
- Frequency Response: 20Hz - 20kHz
- Total Attenuation: 42 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 2X
- Impedance Matching Volume Controller with On/Off Switch
- 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"
- Warranty: 5 Years
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30 Questions asked
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Shawn Goodspeed • 12/17/2019, 2:17:43 PM
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.
Customer Service • 12/17/2019, 2:17:43 PM
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.
TL
Bill • 12/17/2019, 2:17:43 PM
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?
Customer Service • 12/17/2019, 2:17:43 PM
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.
TL
Darren • 12/17/2019, 2:17:43 PM
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.
Customer Service • 12/17/2019, 2:17:43 PM
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
Ben • 12/17/2019, 2:17:43 PM
Can I used this product outside if I put it in a watertight enclosure?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Ben,
You can use this volume control outdoors but you’ll need a waterproof box, such as this unit we offer. http://www.outdoorspeakerdepot.com/drclwa.html
CL/MA1523
Robert • 12/17/2019, 2:17:43 PM
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?
Customer Service • 12/17/2019, 2:17:43 PM
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