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Home / Product Category / Whole House Audio / Volume Controls / In-Wall Volume Controls / OSD Audio VMS300 300-Watt Decora Style Speaker Volume Control Kit with Soft-touch Slider, Impedance Matching and White, Ivory and Almond Colored Plates

OSD Audio VMS300 300-Watt Decora Style Speaker Volume Control Kit with Soft-touch Slider, Impedance Matching and White, Ivory and Almond Colored Plates

Product code: OSD-VMS-300

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OSD Price: $29.95
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Features & Specifications

An installer favorite, the VMS300 volume control is rated at 300 Watts peak and gives you the convenience of controlling volume independently in each room. We include a lot of product shots because we want customers to see the build quality inside and out of this decora-style controller with 12-step linear slider. Quality is critical to the successful sonic performance of any whole house audio system and we pay close attention to performance, reliability and durability. The result is a blend of transparency and functionality, with low distortion and ruler flat frequency response. OSD Audio Volume control delivers seamless control for every room in the house and whether you choose knob control or soft-touch sliders, you’ll enjoy convenience, style and colors to match any decor.


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

Designed for whole house audio systems, the VMS300 is a heavy-duty but elegant impedance-matching volume control that offers the same features of volume controls that cost twice as much and is a nice upgrade from outdated rotary version volume controls. Rated at 300 Watts peak with minimal bass roll-off, the VSM300 includes adjustable jumpers to add up to eight pairs of 8-ohm speakers simultaneously depending on what type of load your amp can handle, 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 VSM300 are designed with precision and a ruler-flat frequency response while the 12-step slider provides noise or pop-free volume control and a wide range of listening volumes.

Why Is Impedance Matching Important?


Impedance is a somewhat complicated topic but in general terms it 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 VMS300 have selectable impedance so you can literally 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.

Specifications

Volume Control 101

It's important to know a few facts about Volume Controls. There are two types of volume controllers we offer; Impedance matching and Non-impedance matching. A basic multi-room system will typically have an amplifier/receiver, a speaker selector, 4 to 8 pairs of speakers, and volume controls. In a basic system multi room system a Speaker selector is used to organize the connection between the Amplifier/Receiver where the Speaker Selector typically has internal impedance protection that is controlled by a manual switch. More complex multi-room systems often add Impedance matching Volume Controls for each room/zone. The Impedance matching Volume Controls feature three settings depending on how many speakers you are connecting. 1 to 2 pairs of 8 ohm speakers the setting is 1/2x. For three or four pairs of 8 ohm speakers the setting is 4X In fact, when adding impedance matching, you must turn off (disable) the protection in the speaker selector. 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. Also remember that 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.

OWNER'S MANUAL

  View Owner's Manual            Product Information

QUESTIONS & ANSWERS

Product Reviews

OSD Audio VMS300 300-Watt Decora Style Speaker Volume Control Kit with Soft-touch Slider, Impedance Matching and White, Ivory and Almond Colored Plates
$29.95
5 Stars based on 8 Review(s)
Steve
Kingwood, TX
5 Stars
I would recommend this item to a friend.

Great product
June 1, 2016
Easy to install, works great, shipping was fast.

Dean
Houston, TX
5 Stars
I would recommend this item to a friend.

Great for a Pair of Outdoor Speakers
August 13, 2013
Was considering another recommended pominent brand volume controller that cost $100 MORE. I couldn't see paying that much $$$ for a simple volume controller that is used occasionally for a pair of outdoor speakers. So, I gave this controller a try and it worked perfectly for my application.
Pros:
Lower cost than other brands.

Ryan
Calgary, Alberta
5 Stars
I would recommend this item to a friend.

As expected
May 16, 2013
Shipping was very fast, and the product is exactly as described. Works great.

Mark
North Texas
5 Stars
I would recommend this item to a friend.

Very pleased
March 28, 2013
This is a solid device! It was very easy to install and works great, came with 3 color options in the box, I could not be happier.
Pros:
Nice removable wire connectors make it easy to wire and then plug in to module.
Cons:
nothing

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

Well worth it....
June 15, 2012
Really didn't want to install volume controls in each room but the OSD rep talked me into it, so glad they did. It really wasn't hard to do and well worth the effort. My wife has been asking for whole house audio for years. Finally got up in the attic and pulled the wire. The inwall speakers and volume controls had great instructions and were so easy to install. The controls are large so use a backless low voltage or extra deep box. Thanks OSD.
Pros:
Easy To Set Up, Quality Construction, Easy To Use

Steve
Undisclosed
5 Stars

Excellent price and ...
May 12, 2009
Excellent price and quality. Used Russound in the past but these are even better. Will buy from them in the future.

Ed
Undisclosed
5 Stars

Everything seemed pretty ...
October 27, 2008
Everything seemed pretty easy and the ordering process played out exactly as expected. Ordered device (a speaker volume control) arrived in about 6 days and installed and functioned like it should have. Would likely use this merchant again for similar purchases.

Mike
Undisclosed
5 Stars

Same quality and finish ...
February 20, 2007
Same quality and finish as the Niles models I usually purchase.