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Home / Product Category / Whole House Audio / Volume Controls / In-Wall Volume Controls / Rotary Style Heavy Duty 300 Watts peak Impedance Matching Volume Control; Kit includes White, Bone and Ivory color matched Decora® Inserts, Outer Plates and Knobs

Rotary Style Heavy Duty 300 Watts peak Impedance Matching Volume Control; Kit includes White, Bone and Ivory color matched Decora® Inserts, Outer Plates and Knobs

Product code: OSD-SVC-300

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OSD Price: $29.95
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Features & Specifications

The SVC300 is a pure resonance VC with 300 Watts of optimized sound quality and minimal bass roll-off. The SVC300 features Impedance matching with 1/2X, 4X and 8X settings. The Heavy Duty auto-former design features outstanding sound quality due to high permeability steel utilization in the volume control core. Another upgrade feature, the speaker wire inserts use lock clips and are detachable allowing you to connect to your speakers with ease. Each kit includes White, Bone and Ivory décora style inserts, outer plates and knobs for an easy color match. Note the Volume Control attenuates the sound, it does not add gain, You set the system optimum level with the Volume control at 0, then you have 12 steps of attenuation (where you are turning the volume down) a total of -54 Db with the SVC300. It is also a good idea to turn the room/zone off at the Speaker Selector when not using it for extended periods. Do not depend on turning the volume control down where you hear no sound. This does not turn the zone off.

Features

• Controls the volume in the dedicated room/zone
• The Wall mounted volume controller works with almost any audio system
• Low distortion and ruler flat frequency response
• Three color choices, all installation materials included

Specifications

More Info about Impedance Matching

All speakers have an impedance rating, typically 8 ohm for a pair of home speakers. To operate in the safest mode, most standard amplifiers and basic two-channel receivers are rated for an 8-ohm incoming load. To operate safely and consistently, the amp needs to see an 8 ohm load, and that’s where speaker selectors and impedance-matching volume controls come into play. In a basic multi room system, only a Speaker Selector is used to connect the speakers to the amplifier/receiver. Not only does the Speaker Selector allow you to connect multiple speakers to the amplifier but also adds internal Impedance Protection which is enabled by a manual protection switch. Both our ISS and DSM series Speaker Selectors feature internal Resistors that protect the amplifier. The down side is that the power rating normally 140 watts is cut in half when the protection switch is enabled so rated at 70 watts with protection. In a standard multi-room system (using Impedance Matching VC) you will typically have an amplifier/receiver, a speaker selector with 4 to 8 zones, and volume controls connected to all the speakers. Impedance-matching volume controls provide more precise protection for the amplifier/receiver versus the protection built into the standard speaker selector. Plus with the protection switch in the off position you will have the maximum power handling capability of the respective speaker selector. It is important that the protection switch is turned off when using the Impedance matching Volume Controls. Most impedance-matching volume controls feature three standard settings: 1/2x, 4x and 8x, while some add a 16-ohm setting like our VMS series. These settings correspond to a chart in the owner’s manual based upon the type of amplifier (4 or 8 ohm) and the number of 4 or 8 ohm speakers that you will be using in the multi-zone/room/speaker system. You can use both 4 and 8 ohm speakers when setting up your system. But you need to count a 4 ohm speaker as two 8 ohm speakers when calculating your Impedance setting.

OWNER'S MANUAL

  View Owner's Manual            Product Information

QUESTIONS & ANSWERS

By Chris from Denver on October 13, 2011
i have one svc300 and want to use it to control the volume on 2 pairs of speakers. i am having trouble getting the speaker wires (2) to fit in each of the four connector outputs. am i doing something wrong?
By Customer Service - Q&A on October 19, 2011

Answer:
The inputs are supposed to accommodate up to 14 gauge. It gets tight when you try to connect two 16 gauge wires together. You can splice the two together with a wire connector that will accommodate three conductors then run a single jumper wire to the input; so eight conductors would become four. They would be wired in parallel still and make sure you set the impedance switch of the SVC300 to 1/2X.

By Drew from Maryland on May 11, 2012
I have a long speaker cable run to this control for my outdoor speakers about 60' so I am using 12 gauge speaker wire. Will I be able to squeeze the 12-gauge wire into these connectors or will I have to add a junction box and splice the 12 gauge down to 14 gauge wire? I would like to not have to splice down the cables obviously, but it looks like there are no speaker controls that can accommodate 12 gauge wire. Thanks in advance.
By Customer Service - Q&A on May 11, 2012

Answer:
Drew,
This is made for 14 gauge max. Most customers thin the wire down to accommodate that large of speaker cable.
CL

By elmer l. tayone from davao city, phillipines on October 27, 2011
WHERE CAN WE FIND A SUPPLIER HERE IN THE PHILLIPINES, SVC 300 VOLUME CONTROL
By Customer Service - Q&A on October 27, 2011

Answer:
We do not have a supplier in the Philippines; however, we do ship overseas. If you are a dealer/or installer, we encourage you to take advantage of our dealer program. Keep in mind that you will have to send us a copy of your business license or permit as required in the Philippines.


MA

By John from New York on May 29, 2012
I have a Lafayette stereo receiver rated at 150watts with your typical speaker A,B A&B combinations.
I have 2 indoor speakers already hooked up. I have installed (2) Polk Audio RC80I speakers installed
outside under the eave. Is the SVC300 the proper switch to use? And if it is, what setting would I use
on the switch itself? Appreciate your help...Thanks..
By Customer Service - Q&A on May 30, 2012

Answer:
Hi John:

I am assuming you mean a stereo pair of speakers on the inside connected to the Speaker A output and you are planning to use the pair of Polk In-Ceiling Speakers connecting them to the Speaker B output. The SVC300 will work fine if you are planning to mount the switch in the wall in the interior of the home. We do have outdoor Volume Controls as well. So one pair of 8 ohm speakers inside and a second pair of 8 ohm speakers outside, is that about right? Question are you planning to connect a volume control to the inside pair as well or are you just wanting to control the outdoor speakers with the single volume control. In this setup the Volume Control would be set to 1/2x the same it would be set to if you had a second volume control connected to the inside speakers. I might suggest our SSVC1 table top volume control which features both a on/off switch and Dual source A/B switch. You could step up and use our SSVC2 and connect both the inside speakers and outside speakers. It all depends on how much control you are looking for and how accessible you are to the speaker wires. We do offer our CL3 speaker wire which works for both in-wall and outdoors including direct burial. You can buy either 4 or 2 conductor (16 or 14 gauge). 4 Conductor would be used from the Receiver to the Volume Control or Speaker Selector than use 2 conductor to each speaker. Please let me know your exact setup so I can be of more help.

TL

By hadis jusic from Ankeny,iowa on November 20, 2011
I have hard time to figure up how to conect my two pairs ceiling speakers end one pair wall speakers with wall volume control and ampfire'Whera i need to go with my wires from speakers to amp' or wall wolume comtrol please help
By Customer Service - Q&A on November 21, 2011

Answer:
The SVC300 Volume Control is connected to the amplifier using either speaker A or B output with a 4- conductor cable (right and left with both having a positive and negative). If you are using a single volume control for three pairs of speakers, you need to wire them in parallel. Take four conductors from the output of the volume control then splice or terminate the wires in parallel (i.e., positive to positives and negatives to negatives). Take the left input (positive and negatives) for the three pairs and terminate them to the 2-conductor coming from the left (+/-) output of the volume control (positive to positves and negatives to negatives). Do the same with the right (+/-) side inputs as well from the three pairs of speakers. Now here is the key: make sure you set the impedance switch of the SVC300 to 4X!

TL/MA

By Cerys from Hong Kong on August 7, 2012
What is the dimension of the volume control and is there a matching base box available as well? Thanks!
By Customer Service - Q&A on August 8, 2012

Answer:
Hi Cerys,
The in wall SVC300 will fit in a standard single gang box. We have the OVC300 that has a complete box type housing primarily for outdoor applications but can be adapted for indoor use.
CL

Dimensions are:

SVC300: 4.125cm W x 6.35cm H x 6.35cm D
OVC300: 7.25cm W x 11.43cm H x 8.25cm D

By Nicole from Hong Kong on August 7, 2012
I would like to ask whether a Back Box is included. Would you please also advise the exact dimension for the device and the back box. Hong long does it take for the product to arrive Hong Kong?
Thanks a lot!
By Customer Service - Q&A on August 8, 2012

Answer:
Hi Nicole,
The SVC300 does not feature a back box, but the OVC300 does include one. The in-wall SVC300 will fit in a standard single gang box. We have the OVC300 that has a complete box type housing primarily for outdoor applications but can be adapted for indoor use.
CL

Dimensions are:

SVC300: 4.125cm W x 6.35cm H x 6.35cm D
OVC300: 7.25cm W x 11.43cm H x 8.25cm D

We ship United States Postal Service to HK.

CL/TL/MA

By AARON from BLAINE ,WASHINGTON on April 17, 2012
WHEN WILL YOU HAVE THESE AVAILABLE? THE SVC300
By Customer Service - Q&A on April 17, 2012

Answer:
Hi Aaron:

We hope to have the SVC300 back in stock by mid to late May. We do have ample inventory of the VMS-300 the Slider style Impedance matching Volume Controls.

TL

By Dave from NH on December 30, 2012
The instruction states: "find out the minimum impedance of the amplifier found on the back" it states 6-8 ohm.
Other instructions state switch setting is based on how many pairs of speakers per control. I am running 1 pair per control, so what do I set the impedance switch to....1/2x or 8x?

By Customer Service - Q&A on December 31, 2012

Answer:
Hi Dave,

The Impedance setting is based upon how many total speakers you are connecting to a single output from your amplifier/receiver, whether you are connecting directly to the amplifier/receiver to the volume controls or going through a speaker selector before getting to the volume controls. As an example if you have four pairs of volume controls each connected to a pair of 8 ohm speakers, your setting will be 4X on each volume controls. If you were using two volume controls connected to two pairs on each volume control, the setting would still be 4X. If you have three pairs of 8 ohm speakers connected to three volume controls, step up to 4X. If you have 5 (6, 7 or 8) total speakers, step up to 8X. If you have a pair of 4 ohm speakers (BOSE outdoor speakers as an example), you count them as two 8 ohm speaker pairs. Let me know what your amplifier/receiver you are using and how many speakers you have and if you are planning to use a speaker selector. If you are using a speaker selector with impedance-matching volume controls, you may need to make sure the protection switch or button is disabled (turned off). That way the impedance- matching volume controls are doing the protection.
TL/MA 1503

By Justin from California on August 22, 2012
This may be a simple question but can this be used in a 12V audio system in an RV?
By Customer Service - Q&A on August 22, 2012

Answer:
Hi Justin,
The SVC300 will work because you are still at a speaker level (8ohm). This is a passive in-line device. The12 volt power is to the head unit which has nothing to do with the speaker signal. So yes you can use one of these between your head unit and the speakers.
CL

Product Reviews

Rotary Style Heavy Duty 300 Watts peak Impedance Matching Volume Control; Kit includes White, Bone and Ivory color matched Decora® Inserts, Outer Plates and Knobs
$29.95
4.5 Stars based on 20 Review(s)
Kevin
Seattle WA
5 Stars
I would recommend this item to a friend.

SVS 300 Volume Controller
July 12, 2016
When I built my house music was a high priority for me, so I installed all the speaker wiring during construction. I have 10 pair of ACE850 8" speakers, each set with a wall mount SVC-300 volume controller. The SVC300's work perfectly, and the speakers rock inside and outside of the house powered by 3 Crown amps. One of the SVC-300's I ordered was defective. I put it back in the box and mailed it back to OSD with a short note. A replacement was on my porch about 4 days later. I can't say enough about how satisfied I am with all of the various items I've purchased from OSD. Solid, on time company, with solid well priced products. A#1.
Pros:
Qualiy and value.
Cons:
None.
Best Uses:
Every room with speakers.

Brenda
Spring, Texas
5 Stars
I would recommend this item to a friend.

Volume control switch
November 6, 2013
This was shipped within a week. It was easy to install and came with different colors to choose from which was great! Reasonable price.

Kevin
Greenville, South Carolina
4 Stars
I would recommend this item to a friend.

Very Solid Device
August 24, 2013
First, I was impressed at the how easy this was to install. It only took me about five minutes to complete. This is a very durable device. I have it mounted right inside the door that controls our outdoor speakers. So people will crack the door, reach in, and crank it. No problems yet after multiple pool parties.
Pros:
Solid Easy to install
Cons:
A little larger than the standard rectangular opening on the cover plate. Had to file the plate a little.

Jorge
Central CA
3 Stars
I would recommend this item to a friend.

Resonable Value
August 22, 2013
The audio quality I can't complain about. It does the job it's supposed to do without any issues. However the switch could be improved somewhat cosmetically. I elected to use the white colored wall switch and knob, however both aren't as "white" as they should be, almost old looking. I suppose, for the price, it's something that I can live with.
Merchant Response:
We use standard white color. Some of the wall painting color is different as standard white color.
Pros:
Functions good
Cons:
Color is a bit old looking

Bob
Cramerton NC
5 Stars
I would recommend this item to a friend.

works great
August 11, 2013
I added 8 ohm speakers in my work shop and I had to balance them with 1.4 ohm Bose speakers that were in rooms in the rest of the house The VSC 300 allows this yo work perfectly.

Wayne Powell
Lake Havasu, AZ.
4 Stars
I would recommend this item to a friend.

Impedance match volume control
June 17, 2013
This is my 6th unit in home and all are very sturdy. precise and perform flawlessly so far. I have been using some for about 4 years now and in some extreme heat and dryness. I would rate them 5 star if the had removable, snap in terminal blocks like others have to ease installation. Would recommend these to anyone for sure. OSD had the best pricing and was timely on shipping. Good value for the $$$$.
Pros:
as above
Cons:
no removable terminal blocks

Curtis Jones
Desoto, Texas
4 Stars
I would recommend this item to a friend.

I recommend this product
June 4, 2013
So far the volume control is working like it should No complains
Pros:
best use is for whole house sound works well with the speaker selector quality build
Cons:
none
Best Uses:
Give you the ability to control the music from each room

Sandbug Sound
Glendale, CA
3 Stars
I would recommend this item to a friend.

A Volume Control!
February 26, 2013
For the expense, they are great and get the job done. However, they are really large (they need a deep wall box), and the wire hookups could have been designed better (they won't take 14 gauge wire well and they switch sides (positive on the incoming is on the inside left, the outgoing positive is opposite right back).
Pros:
Low Power Consumption, Easy To Use
Cons:
Bluky, Heavy

Farmer B
New York City Area
5 Stars
I would recommend this item to a friend.

Just as good as before
October 27, 2012
I had the box from our AV installer and found Outdoor Speaker Depot online. The controllers came in just a couple of days and we now have one in every public area. They work beautifully and the delivery was excellent.
Pros:
Quality Construction, Easy To Set Up, Easy To Use

chevy99
visalia ca
5 Stars
I would recommend this item to a friend.

worked great
September 6, 2012
needed a better volume control that could handle more watts and this one worked great
Pros:
Easy To Set Up, Easy To Use
Best Uses:
Upgrade

Dr. C.
Central Texas
5 Stars
I would recommend this item to a friend.

SVC 300's Work Great!
September 4, 2012
I installed a multi-zone system with ten volume controls to multiple speakers in a new dental office. I had no previous experience with sound systems. OSD helped design and recommend the components needed for the sound system in the office. The entire system including the SVC 300's work great.
Pros:
Easy To Set Up
Best Uses:
New system

Anonymous
Undisclosed
5 Stars

Stereo, heavy duty volume ...
December 3, 2010
Stereo, heavy duty volume controls came in in a timely manner and were just what we had ordered. We are installing them now and are very pleased. The gentleman on the phone was very helpful in our answering our questions..

Wiliam
Undisclosed
5 Stars

I ordered 2 along with ...
June 4, 2009
I ordered 2 along with wire great product and fast shipping

Matt
Undisclosed
5 Stars

We purchased the OSD ...
January 15, 2009
We purchased the OSD volume control & speaker selector, works great, fast delivery at a great price, only wished we had ordered 2 of each, will be ordering another of each to finish off our home stereo system.

Tom
Undisclosed
5 Stars

Much better product than ...
December 11, 2007
Much better product than expected. If you are in need of a good volume control (2 channel) this will fit the bill. A no hassle purchase with excellent shipping, etc Buy here and you will not be disappointed I sure wasnt. Tom

Drew
Undisclosed
5 Stars

Very Nice! They shipped ...
February 19, 2007
Very Nice! They shipped quickly as promised and the quality of the products (impedance balanced speaker controls) is top notch. Equal quality controls quoted at a discount in town was approx 3 times more expensive. The price, quality and fast customer service was very very good! I would definately use them and have already recommended them to friends.

Ted
Undisclosed
5 Stars

I used to buy from Parts ...
January 7, 2007
I used to buy from Parts Express for my first 2 Do-it-yourself jobs. Not any more, since I found OSD. I sent a technically-related email to them at 6pm my time, and got a response back within 45 minutes! Talk about first impressions!! Bought an 8 speaker selector, 2 volume controls, pair of awesome ATc-6 speakers, & wires for my installation. I wanted to save a little money vs. pay someone else to do it, and it was a breeze! I'm not the most handy guy, so when I asked how to mount the volume controls, a guy walked me through how to punch the hole in the wall, and install a single gang box (hadn't done that before). The speakers sound great, and I saved $750 with OSD's products and technical help both on the phone and by email. I'll never go to Best buy or other websites again. OSD made me look like "the man" when I showed my wife our savings...and she loves the sound in our basement! Stop searching for quality, afforable indoor speakers. They've got it nailed. Oh, by the way, their name may say "outdoor..." but they are indoor speacilists as well.

Mark
Undisclosed
5 Stars

Excellent products, it ...
August 10, 2006
Excellent products, it didn't fit into my single gang box but I swamp the single gang box with the Carlon SC100 adapter ring that you can get from local hard ware store. The adapter works like a charm.

Sam
Undisclosed
5 Stars

Great quality product at ...
August 7, 2006
Great quality product at bottom price. I had problem with size of this VC due to its larger size. It won't fit in the single gang box until I bought a data ring bracket from Home Depot. That makes it perfect fit.

John
Undisclosed
5 Stars

Same quality but cost ...
June 3, 2006
Same quality but cost half of what I used to pay for other brand.