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Home / Product Category / Whole House Audio / Volume Controls / In-Wall Volume Controls / OSD Audio VMS100 100-Watt Decora Style Speaker Volume Control Kit with Soft-touch Slider, Impedance Matching and White, Ivory and Almond Colored Plates

OSD Audio VMS100 100-Watt Decora Style Speaker Volume Control Kit with Soft-touch Slider, Impedance Matching and White, Ivory and Almond Colored Plates

Product code: OSD-VMS-100

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Features & Specifications

. Decora style impedance-matching volume control for whole house audio systems and dedicated audio zones
. Rated at 100 Watts peak with minimal bass roll-off
. Impedance-matching helps stabilize the ohm load to avoid overheating
. Accepts up to 14-gauge wiring and fits in a standard gang box with a depth of 2.9”
. Includes junction box, screws and white, ivory and almond trim plates to match any room décor
. Precision electronic design provides low distortion and a ruler flat frequency response
. 12-step linear slider for pop-free control and a wide range of listening volumes
. Installs easily and works with almost any audio system

OSD Audio’s VMS100 is an impedance-matching volume control for adjusting the volume of a pair of speakers within a whole house audio system. Ideal for dining rooms, saunas, porches or other areas of the house where you want to add sound, the VMS100 maintains the full hi-fi audio frequency response with no low frequency roll-off and is equipped with the same features of volume controls that cost twice as much. Rated at 100 Watts peak, the volume control includes adjustable jumpers to add up to eight pairs of 8-ohm speakers simultaneously, 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 VSM100 are designed with a ruler-flat frequency response while the 12-step slider provides noise-free volume control and a wide range of listening volumes.

What Is Impedance Matching Volume Control?

Impedance 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 VMS100 have selectable impedance so you can 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.


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.


  View Owner's Manual            Product Information


28 Questions & 30 Answers
from Pottstown, PA asked:
October 11, 2018
I would like to have 16 ohm pendant speakers in one zone for the production floor of our facility. I would like to pair this with one of your 8 ohm amplifiers and a zone selector. How would I go about using 16-ohm speakers with this particular amp?
1 Answer
Hi Rich: The Pendant speaker has a Knob that is used to select the 70V Tap setting; 2.5W/5W/10W/20W. It has a fifth choice as well; 8 ohms. When set to 8 ohms the internal wiring bypasses the internal step-down 70V transformer. So you can use this speaker with the 4/8 ohm amplifier and the Speaker Selector (with and without Impedance matching Volume Controls). Also, check out the Preamp-1 preamplifier that is a valuable addition to any one of our two-channel amplifiers. Two unique features of the Pre-1 are one, the ability to change your signal to Full range stereo/mono (which might be ideal for your application) and second, the Pre-1 has up to a 1.5V output gain. Please let me know if I can help with your setup. TL/5241
Submitted by: Tim Leahy on October 11, 2018

from Ferndale , Washington asked:
June 13, 2018
Hi there, I'm using a Niles SI-1230 Systems Integration 12 Channel Power Amplifier using 30 watts RMS per channel into 8 Ohms, powering 6 pairs of Yamaha speakers 110 W;Impedance-8 Ohm and using this volume control for each pair, should I set the impedance to 8?
1 Answer
Hi Andre: Since each speaker is connected to a dedicated Amp there is no need to worry about impedance matching. The impedance settings on the VMS100/300 are 2X, 4X, 8X and 16X. These numbers refer to the number of 8-ohm connections you have to a single stereo amplifier and in your case, you only have a single 8-ohm pair connected so 2X should be the choice. The question I have for you, have you already installed all the VMS100? Please let me know because there are other options I could recommend. TL/5053
Submitted by: Tim Leahy on June 17, 2018

lee peoples
from OKlahoma city asked:
May 21, 2018
I've had this slider control for about 5 years and it has been working well except that recently i've noticed one of the channels (left or right speaker) cuts out from time to time. If I move the slider up and down it both channels come back on. Is there a way to fix this - blow out with compressed air, lubricate with silicone grease / WD-40 or something? Or should I just replace?
1 Answer
Hi Lee: I can see blowing it out with compressed air. But would hesitate with the other options. I would contact OSD Audio customer service directly and talk to them. One to ask if they can check with the internal; technician on what other solutions there might be. Or think about replacing the current units where we can give you a replacement deal. TL/4996
Submitted by: Tim Leahy on May 22, 2018

Tom Morton
from Fallston, MD asked:
April 2, 2018
I purchased 3 VMS100 controls to control 3 pair of 8 ohm speakers. All will be running off a basic 4 channel stereo amplifier. 4 speakers will be 1 indoor zone and 2 speakers will be 1 outdoor zone again each pair with its own volume control. What impedance setting do you recommend for each VMS 100? Thanks
1 Answer
Hi Tom: Safe setting would be 4x for all three VMS100. Especially if you are using a standard 8 ohm Receiver. TL/4886
Submitted by: Tim Leahy on April 5, 2018

John S Alcorn
from Upstate South Carolina asked:
December 6, 2017
Hi, folks, I was just online with one of your reps to discuss this topic, and got cut off (by him?). I want to connect 2 pairs of 4 ohm speakers to my amp; one pair to Speaker A outputs and one pair to Speaker B outputs. I am assuming that I would use one VS100 control for each pair of speakers (confirmed by your rep). Here are my questions: 1. Consider only Speaker A outputs from the amp. If I hook this to your VS100 and one pair of 4 ohm speakers, how should I strap the control? 2. If I am supposed to strap the control for "1/2x", then what would the impedance be that the amp sees, if I connected a pair of 8ohm speakers? (I am guessing 8 ohms?) 3. If I am supposed to strap the control for "1/2x", then what would impedance be that the amp sees, if I connect a pair of 4 ohm speakers? (I am guessing 4 ohms) 4. If your answer is that the amplifier 'sees' 8 ohms in each case, what mechanism is used to automatically sense the lower 4 ohm impedance load of the 4 ohm speakers and somehow adjust the impedance seen by the amp, with no change in strapping? If that is being done, then why not automatically sense and adjust for every additional pair (no straps!)? Is there such a thing as a dynamically adjusting transformer? I would think this would take real smarts (costing real $$$), so this doesn't seem to make sense? 5. If the reality is that, if strapped for "1/2x", a pair of 8ohm speakers will load the amp with 8 ohms, ea. and a pair of 4 ohm speakers will load the amp with 4 ohms, ea. (because the control is strapped the same for each), then, can I present an 8ohm load to the amp by strapping your control for four pairs of speakers instead of "1/2x"? (I am thinking the answer is probably, 'yes'?) If you can tell me how to deal with the 4 ohm problem, I am waiting to buy. By the way, it would be helpful if the little installation sheet for this control covered this topic explicitly. The chart on that sheet only covers 8 ohm speaker pairs and multiples thereof... Thanks for your help! Best Regards, John S. Alcorn Tel: 864-972-3702
1 Answer
Hello John: I am sorry for the confusion. Most impedance charts are based upon 8 ohm loudspeakers with 8 ohm Amplifiers or eight ohm speakers with 4 ohm amplifiers. So when considering 4 ohm drivers to work with an 8 ohm amplifier you have to calculate each 4 ohm loudspeakers should be considered as two 8 ohm speakers. There used to be a 1X setting before we combined it with the 2X (now 1/2x). It was basically a pass through with no impedance matching. So someone figured we would just combine the 1X and 2X to just a 1/2X to simplify things. In your case if you have the VMS100 on Speaker A and a 4 ohm speaker set to 1/2X you multiple the 2x times the 4 ohm of the speaker and get 8 ohms. So if you had a VMS100 connected to an 8 ohm speaker it wold be 2 x 8 or 16 ohms the amp sees. But since you are adding a second VMS100 and a pair of 4 ohm speakers to that you would get 8 ohms again (2X times 4=8 ohm). But if you listen to both A and B at the same time then you have two 8 ohm drivers in parallel so the amp would see a 4 ohm load overall. Can your amp handle a 4 ohm load? If you had (2) 8 ohm speakers with VMS100 set at 2X each so a 16 ohm load and you wanted to play them at the same time the load would be 8 ohm times 2 (16 ohm in parallel is half or 8 ohm). So in order for you to use (2) 4 ohm speakers each with a VMS100 impedance matching volume control you would need to set the Impedance at 4X on each Volume Control. Ironically by dropping the impedance from 8 to 4 your are asking for more current which increase power as well as heat. The weak link here is the VMS100 because it is rated at 50 watts rms/100 watts peak. This will cause the transformers to saturate causing distortion at lower levels. So I always recommend going to the highest value (either our VMS300, SVC300 or OVC300) especially in your application. It can be confusing, but it is better to error on the safe side (higher Impedance) Good luck TL/4681
Submitted by: Customer Service - Q&A on December 8, 2017

from Greenwood Village, CO asked:
August 2, 2017
I have 9 sets of remote speakers attached through zone 2 on an Onkyo receiver. All of the speakers work fine except for one set, where I just installed the volume control kit. At both the 8x or 16x switch setting, I can barely hear through the speakers when the volume on the control kit is turned up all the way. This also was true with the last volume control kit. I have checked the connections and they are correct. Any suggestions? Thanks.
1 Answer
Hi Bill: I did not see any mention of a External Amplifier or Speaker Selector as part of your system. Can you let me know a little bit more about your system. Sounds like you have a lot going on. TL/4501
Submitted by: Customer Service - Q&A on August 3, 2017

from US asked:
March 15, 2017
Hello, I recently ordered and received 2 volume control units (VMS100) for two pairs of 8 ohm speakers. Before installing the volume controls, the speakers operated fine from a single receiver with A+B zones. If I am hooking up the volume controls to the exact same setup (same receiver, same 4 speakers) just splicing the speaker wire in the wall to accommodate the volume control, would I choose the 2x jumper setting or should I be able to use 1x, knowing the receiver worked before introducing the controls? Thanks Matt
1 Answer
HI Matt: I would set the VMS100 to 1X which should by pass the impedance protection. You are only adding the Volume Controls so you have more control over the volume in the actual zone. These volume controls are attenuators which means you are starting with your volume from the source than just turning the volume down. You are not adding any gain, these are passive devices. If you were not having an issue playing both speakers at the same time before the Volume Controls than 1X setup would be best. The 2X setting is only if you need the Volume Controls to control the impedance which does not sound like the case. TL/4255
Submitted by: Customer Service - Q&A on March 15, 2017

Quincy Kirt
from Louisiana asked:
July 24, 2016
Hi, I'm running four sets up speakers in zone 2. Each connected to an impedance matching volume control. ( VMS 100) I set the switch to 8. Is that OK? I've noticed the instructions guide gave a brief summary on how many pairs and what to set each volume control too. The summary was 1-2 SW-2, 3-4 SW-4 5-6 SW-8. I fall in the 3-4 range but I didn't set them to 4. I set them to 8.
1 Answer
Hi Quincy: That is a loaded question, I am assuming when you say Zone 2 you are referring to a Speaker level output on your Audio Video Receiver where you have connected four pair of speakers all in parallel with a VMS 100 on each pair and you have set the impedance Matching setting to 8X. So how does it sound, are you having to turn up the volume quite a bit on your receiver to get enough output? Typically most Audio Receivers recommend going with a external amplifier when connecting any external device like a speaker selector or volume controls which usually means you are connecting more than just a pair of speakers. Most of these do offer both a Speaker Level (direct connect to the speakers) or Signal Level (Pre-amp output to External amplifier). If you had connected the four pair to a High Current Power Amplifier like our AMP-200 I would recommend the setting be at 4X on all four Volume Controls. The 8X setting without an external amplifier would be like operating your system in safe mode, just not sure if you will get enough output to power all four pairs at the same time. Please feel free to contact me at and provide me a little better description of your layout so I could provide you with a better answer. TL/3997
Submitted by: Customer Service - Q&A on July 24, 2016

Ross Herndon
from Oklahoma city asked:
July 17, 2015
Is a speaker selector box a necessity or can I just wire straight to the amp and control on/off/volume at the wall controller? When on its lowest setting, will the volume be off?
1 Answer
Hi Ross, It depends on what you're running. If you're just running 1-2 pairs of speakers off the amp, you shouldn't need the speaker selector unless you want to have individual on/off capability and volume control for each pair of speakers. The volume control at its lowest setting will not completely turn the the music off, just very low. How many speakers are you planning on running and what amp would you be using?
Submitted by: Customer Service - Q&A on July 17, 2015

from Spokane asked:
February 6, 2015
I have the VMS 100 and want to run 3 outdoor speaker and (1) in door speaker off the controler. Do I connect wires together and place them in the wire connections?
1 Answer
mTurns: I would not recommend connecting all four pairs of speakers through a single Impedance matching Volume Control. Worse case I would have you add at least one more Volume Control like our OVC300 to connect to two of your outdoor speakers then have the VMS100 connect the third pair of outdoor with the Indoor pair then make sure the Impedance Setting on both units is 4x. Are you using a dedicated Amplifier (like our AMP200 vs AMP120) or attempting to run all four pairs off a second zone output from a Audio/Video Receiver? Most AVR second zone output do not want you to load up multiple speakers even if it is Impedance matched with Volume Controls. The more speakers you add to a single device or by adding even the two volume controls costs you output unless you have the Current needed and that depends on your Amplifier setup you have. TL/3132
Submitted by: Customer Service - Q&A on February 7, 2015

from Salem, NH asked:
May 21, 2014
How exactly is the impedance being matched? My setup is the same exact configuration as the example in the instructions, only difference being I have 6 Ohm speakers. I am not measuring the expected impedance that my amp is seeing when using the 4X mode. In order for me to have my amp see roughly 6 ohms is setting both controllers to 16X, why is that? When i only have one controller connected in 16X mode i get 12.6 ohms, then connecting the other one i get i get 6.3 ohms. which makes perfect sense b/c 12.6 in parallel with 12.6 is 6.3. But why is the impedance only 12.6 when in 16X with a 6 ohm speaker? Just trying to figure out if my logic is correct or if there is something i'm missing. Also i noticed the impedance drops an ohm or two from low to high volume, is that expected?
1 Answer
Hello Bryan, Impedance is not constant or consistent, it varies based on frequency and load. The load itself is also varying based on the magnetic to electrical efficiency of the load (speaker?). In addition, the cable used can affect the impedance and the crossover can affect the impedance. The general rule of thumb is to have a match between speakers and amplifier that is within 0 to +2 Ohms above the rated load. So a speaker rated at 4 - 6 ohms should be connected to a source rated between 2 - 4 ohms. The important part is to not allow the amp to see less than the 4 ohms. The difference being measured when you connect more or less equipment to the VC is most likely due to the individual variances of each of the different pieces of equipment all added together. DT 2703
Submitted by: Customer Service - Q&A on May 29, 2014

from Orlando, FL asked:
May 16, 2014
I am connecting this to a Sonos Connect:AMP and a pair of MK850 speakers. Which setting should I use? (2/4/8/etc?)
1 Answer
Hi Rhys, You want to set it to 1/2x. How many watts are outputting from your connect amp? BM 2687
Submitted by: Customer Service - Q&A on May 20, 2014

from Detroit asked:
April 27, 2014
I have 3 vms100 VCs and 3 pair of 8ohm speakers connected to each of its own VC. What is the correct impedence setting I need to set for each VC? 2x or 8x?
1 Answer
Hi Petro, You want to set each volume control to 4x actually. BM 2644
Submitted by: Customer Service - Q&A on April 28, 2014

from Austin texas asked:
April 23, 2014
can two of these volume controls fit side by side in a double gang box?? (the blue plastic electrical boxes) thanks
1 Answer
We're not entirely sure here, but we don't see why not. It may depend on the brand of box. Just make sure the dimensions of the box will fit the dimensions of two of the volume controls. Will you still be using the front plates that come with our volume controls? BM 2634
Submitted by: Customer Service - Q&A on April 24, 2014

from California asked:
April 14, 2014
Hi, I have Denon AVR 2309, 130W per channel. Planning to use zone 2 to drive 2 pairs of 8ohm speakers, each pair with a dedicated VMS volume controller. Would the VMS 100 work given the per-channel 'peak' power is 130W from the receiver?
1 Answer
Hi Kevin, You would need to step up to the VMS-300 to handle that kind of power. The VMS-100 can only handle 100 watts peak. The VMS300 will have no problem handling that, and I'm pretty sure the cost difference is just a few dollars. Thanks! -BM 2615
Submitted by: Customer Service - Q&A on April 14, 2014

from dallas, tx asked:
January 3, 2014
I have only one channel wired input for one controller with two speakers, can the VMS 100 be wired in such a way to allow the left and right channel in the one input? Hope this is clear.
1 Answer
Hi William, I'm not sure whether you're referring to a channel as a left speaker or right speaker, or if you're meaning a zone, as in left AND right speaker. Typically a channel is one speaker and a zone is two speakers, therefore one zone is two channels. Thus, the VMS100 has an input connection for both the left and right channels. So you would take either a 4 conductor wire from your amp/receiver into the left and right input on the volume control, or you would run two 2 conductor wires from amp/receiver to volume control. Now, if you're asking if you can run two wires into one single speaker input on the volume control, the answer is no. If your amp can run in Mono, then you can run a single wire into one channel on the control, but not two wires. Hope that makes sense. Thanks. CS 2423
Submitted by: Customer Service - Q&A on March 6, 2014

from Canada asked:
December 1, 2013
I have a 7.2 pioneer SC-63 with a DC3 amplifier amp that puts out 125 watts RMS per channel. I was wondering if this will fry the volume controller as it is only rated at 100 RMS power. I will have 4 pairs of speakers coming off a distribution box and a volume controller for each pair. thanks, Jason
1 Answer
Jason, Will the 4 pairs be running off one channel or each pair has its own channel? In other words, will 125 watts be distributed into 4 pairs or will each pair have 125 watts? It may be safer to go with the VMS300. Let us know. Thanks. -BM 2367
Submitted by: Customer Service - Q&A on December 2, 2013

from Salt Lake City, UT asked:
October 5, 2013
Other vendor's volume control specifications note that they can only support 14 AWG wire, however I have 16 AWG wire. Will this still work with the VMS100?
1 Answer
Jared, Yes. This volume control will work with 16 gauge wire. The only gauge it may have difficulty with is 12 gauge. Thanks. -BM 2261
Submitted by: Customer Service - Q&A on October 15, 2013

from San Diego asked:
March 14, 2013
Is the VMS100 available in light almond, looks like it is one of three optiions in the picture but don't see an option for it in the ordering process? Thanks :-)
1 Answer
Hi Albert, You don’t need to pick a color. OSD Audio volume control come with all three colors in the package. This way you can switch it up if your decor changes because you will have spare face plates and knobs. CL/MA 1701
Submitted by: Customer Service - Q&A on March 14, 2013

from San Diego, CA asked:
March 12, 2013
What are the dimensions?
1 Answer
Hi Albert, The VMS100 volume control will fit in a standard gang box and measures 4.125cm W x 6.35cm H x 6.35cm D. CL/MA 1696
Submitted by: Customer Service - Q&A on March 12, 2013

from new york asked:
July 25, 2012
My speaker RC 801 20 watts to 100 watts 8 ohms per channel, how many speakers this type can i control with one ( 1 ) VMS 100 slide volumen control ? please get back to me ASAP
1 Answer
Hi Jamie, Our volume controls have 4 inputs and 4 outputs, meant for a pair of speakers. One left and one right. The only way you can add more to one volume control is by wiring in parallel, which we don't recommend for the novice installer. CL
Submitted by: Customer Service - Q&A on July 25, 2012

from new york asked:
July 25, 2012
I have 16 units of your VMS-100 slider. How many speakers can control 1 VMS-100? My speaker is 20 watts to 100 watts 8 ohms.
1 Answer
Hi Jose, Our volume controls have 4 inputs and 4 outputs, meant for a pair of speakers. One left and one right. The only way you can add more to one volume control is by wiring in parallel, which we don't recommend for the novice installer. CL
Submitted by: Customer Service - Q&A on July 25, 2012

from Houston, TX asked:
July 18, 2012
Since connecting the 2 Volume Controls to the Sonos ConnectAMP, I have noticed that the audible volume is lower than without the volume control connected and the ConnectAMP at the same volume as previous. What could cause this?
2 Answers
Hi Mark, These are impedance matching volume controls, that does take away slightly (less than 10%) from the power handling the speaker receive. You should make sure the settings on your two volume controls are at the lowest 1/2x to minimize the power loss. CL
Submitted by: Customer Service - Q&A on July 18, 2012
Hi Mark: The primary function of an impedance matching Volume Control is just that, to control the impedance matching (mainly to protect the Amplifier/Receiver). This is a passive device that does not add any gain. In effect you are not turning the Volume up but Attenuating the Volume Down. As you turn the volume down the signal is diverted to the transformers causing a bit of a load that ultimately drains power or volume compared to when you use no volume controls. So you will find you need to increase the volume level of the SONOS to higher settings to achieve the same volume level that you get without the volume controls. YL
Submitted by: Customer Service - Q&A on July 20, 2012

from Phoenix asked:
July 16, 2012
I have one sonos system that controls three rooms, two adjacent on the first level and the third in the basement. The speaker selector is on the second floor of the house (three floors away from basement) and it is impedance matching. Since I can't turn off the impedance matching for just two zones on the speaker selector, can I turn it off on the volume controller? Just want this in basement so I don't have to have it on down there (bedroom in basement as well).
1 Answer
Hi Pete, The VMS100's lowest setting would be 1/2x. Switch your volume controllers to this setting and this will disable the impedance matching so your speaker selector can take over. CL/MA
Submitted by: Customer Service - Q&A on July 17, 2012

from Houston, TX asked:
July 8, 2012
Will this work with Sonos ConnectAmp? Would I need to make any changes? If I have two zones connected to a single AMP; would having one turned down and the other on cause any issues?
1 Answer
Hi Mark C: You should have no trouble connecting two VMS100 to your SONOS connect AMP. Make sure Impedance Setting is set to 2X. A Volume Control is an attenuator that adds no gain. When you turn down the volume in one zone the Volume control diverts the current to its transformers. The amplifier is still outputting to each volume control. Just understand that the VMS100 is not to be used as a on/off switch. That is usually accomplished by adding a speaker selector like our IS4 which features dedicated on/off switch per zone. You could even add two additional pairs with volume controls if needed and still have no problem. TL
Submitted by: Customer Service - Q&A on July 9, 2012

from Minneapolis asked:
April 17, 2012
Will this volume controller work with the SPW-8 Eight Zone Speaker Distribution Panel. I will have 5 pairs of speakers with a Sonance 2120 AMP. 120 watt per channel x2 8 ohms. I was planning to use a VSM 100 volume control for each pair of speaker. Speakers will be max of 125 watts.
1 Answer
Hi Jed: Yes these will work perfect with this setup. You will need to set the impedance to 8X for each Volume Control. That will insure your Sonance Amp sees a workable impedance load. TL
Submitted by: Customer Service - Q&A on April 17, 2012

from Los asked:
January 30, 2012
when the switch is at its lowest level does the sound shut off>
2 Answers
Jim This volume control does not have an Off switch, but the SVC205 does. CL
Submitted by: Customer Service - Q&A on January 31, 2012
Hi Jim, Most of our Transformer style Volume Controls do not disconnect even if they are turned all the way counterclockwise. They may be inaudible but there is still a connection. We do offer the SVC205 Impedance Matching Volume Control that features a true on/off switch. Unfortunately, it is not available in a slider style. We do offer a resistor-based volume control that is a "Break before Make" design that does completely disconnect when turned fully counterclockwise. This is not Impedance Matching but it has a broader Frequency Response and may offer a little better sound quality than the transformer based. TL/MA
Submitted by: Customer Service - Q&A on January 31, 2012

from Roy, Utah asked:
January 6, 2012
I have 4 ceiling speakers (2 pair), do the speaker wires (8) hook into this controller and then do wires go out to the receiver? I guess the real question is how does the whole hook up work?
1 Answer
Doug, You would splice this is in-line where it fits best. The input would be from the amp/ receiver, and then through the output -to the speaker. Our volume controls have four inputs and four outputs. It works great for a pair of speakers. Note: Putting more than one pair per volume control is not recommended by OSD Audio for the novice user. CL
Submitted by: Customer Service - Q&A on January 6, 2012

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