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Home / Product Category / Whole House Audio / Speaker Selectors / DSM8 Dual Source 8 Zone Speaker Selector High Performance with Amplifier Protection

DSM8 Dual Source 8 Zone Speaker Selector High Performance with Amplifier Protection

Product code: OSD-DSM8

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Features & Specifications

Speaker selectors like the DSM8 allow you to distribute an amplified signal to multiple zones throughout the house without losing audio quality. These units also have manually activated impedance-protection circuits that protect your amps or receivers from low impedance levels as you add more speakers to each zone. With independent a/b switches per zone, the DSM8 dual source 8-zone speaker selector lets you input two music sources, for instance, iPod library and satellite radio, and choose which source will play in a designated zone. Keep in mind that playing different sources in different zones at the same time requires separate amps or receivers to power those sources. The a/b switches are a convenient way to switch from source 1 (amp A) to source 2 (amp b).

• Removable input/output connectors which accept 14 gauge speaker wire
• Four color display packaging
• Eight zone speaker selector
• Dual source with manual protection switch
• Removable input/output connectors


Other Product Info

Dual source with independent a/b switch per zone - you can input two music source and choose at each zone.


  View Owner's Manual          


12 Questions & 12 Answers
from Maple Valley, WA asked:
February 7, 2019
I have used several selectors with limited success...I have never been able to find one that totally muted out the main speakers. I have a set of speakers outdoors on my deck and do not want any of my indoor speakers to play. By limited success I mean that I can get the outdoor ones to play but cannot get the indoor ones to turn off. Will this zone selector do what I want?
1 Answer
Hi Jim: The DSM8 Speaker Selector features a separate on/off button per zone that disconnects the signal path when the button is in the out/off position. It also features dual source input so you can add a second amplifier/source and play different music inside while listening to a different source outside. Do you have eight stereo zones (one zone outdoors and seven zones inside) each featuring a stereo pair of speakers? Are you using Impedance Matching Volume Controls (one Volume control for each zone/pair of speakers)? If you are counting on the internal protection of the DSM8 Speaker Selector with no Impedance Matching Volume Controls, then you should consider the TSM8 Speaker Selector with Variable Protection. It also features dedicated On/off buttons per zone as well. Questions; TL/5401
Submitted by: Tim Leahy on February 15, 2019

from Austin, Texas asked:
July 28, 2018
Hi, I have a Dannon AVR 2113CI receiver, a set of 5.1 speakers with subwoofer (Definitive Technology pro 600), plus two sets of PolkAudio Atrium4 speakers, and OSD DSM8 speaker selector. The Polk audio sets of speakers have a volume control installed (OSD SVC 60). The other speakers do not have any volume control. I have the following questions: (1) How do I connect the surround (back speakers) and center speakers with that setup? (2) Should I use the impedance protection on for the OSD DSM8? (3) Would my configuration overload my system? Thanks.
1 Answer
Hi Ray: I am a little confused on your setup. I see 5.1 from your DENON AVR 2113CI, then you talk about a couple pair of Polk Audio Atrium speakers, I am assuming are in different part of the house (maybe outdoors). You mention a having a DSM8 with a single volume control again I am assuming you have connected the DSM8 to the assignable speaker output normally channel 6 and 7 of your DENON. Question#1 not sure you can interface the DSM8 with your surround speakers and center channel, I do not believe you are using an external amp connected to the Zone 2 preamp output of the DENON. Question #2: If you are listening to two or more zones at once regardless of the one Volume Control you have in your system you should be using the protection on the DSM8 (on back panel). Question#3: Based upon your description I am concerned about you overloading your system. Want to tell me more; TL/5132
Submitted by: Tim Leahy on August 3, 2018

Rickie Currens
from Scottsdale, AZ asked:
May 10, 2018
The push pins on the back of the DSM8 I just bought does not look like drawing in manual. Can you describe how these work, sorry I can't get it.
1 Answer
Hi Richie: The Connectors on out ISS, DSM and SSVC speaker selectors are identical. They feature European style removable input and output connectors. There is a set screw for all connections which you will want screw counterclockwise with small Philips head screwdriver so the head of the screw is just popping out of the hole. Strip about a 1/4" of the outer jacket (16 Gauge fits the best). With the connector on the table you have more leverage to tighten each screw. Twist the conductors before inserting into the slot. Check to make sure there are no extra stray conductors. Make sure all your components are unplugged from the wall while making connections. TL/4972
Submitted by: Tim Leahy on May 11, 2018

from QC asked:
February 4, 2018
Hello! I'm planing to purchase the DSM8. I would like to plug 8 different speakers that will be driven from a Vintage receiver like the Realistic Sta-2100D (125 W/per channel) or the Kenwood Kr-9600 (160 W per channel). In my case and need I just want to be able to A/b/c/d/e/ different speakers listening when I feel like. Meaning I would not be listen to more than 2 speakers at the same. And mostly I will only listen or monitor my Mixes 1 speaker at a time. Can the DSM8 be a good suited option for me?? Or will I need something else? Note that my speakers varie from Yamaha NS-10 studio monitors to Celestion Ditton 15 xr /Ditton 33/Ditton 44/Ditton 25 & Ditton 66 MKII studio Monitors. Thanks
1 Answer
HI Nexus: The DSM8 is an excellent piece of gear and would be suitable for your application as you describe it. The key is as long as you are just playing a single or two pair of speakers at a time you would want to disable the protection switch. The protection switch when enabled cuts the power in half when it adds the internal resistors in line. You want the direct pass through. You could also wire up both receivers since the DSM8 features dual source switchable per zone. So you could compare both receivers with any two speakers. So based upon your description this would be ideal for your application. Note 16 gauge fits perfect into the input/output connections but you can squeeze 14 gauge with a little work. TL/4783
Submitted by: Customer Service - Q&A on February 5, 2018

from Patterson, NY asked:
June 10, 2015
I'm looking to power 32 Speakers using 2 of the DSM8's. The speakers are rated at 50W RMS a piece. Would I need to buy 2 Amp200's and 2 Amp300's bridged mono to do this?
1 Answer
Hi Matt, I think you would be fine with the AMP200, however running it in bridged mode may be too much for the speaker selector to handle. It pushes out a lot of power in bridged mode. Are these mono speakers or are you just not running two speakers in each zone?
Submitted by: Customer Service - Q&A on June 10, 2015

from Knoxville, TN asked:
February 12, 2015
If you select all the speakers to be on at one time, I guess you're dividing the Wattage output of your amp by 8 to each channel? So an amp with 100 Watt output through the 8 output selector with all outputs on would be 12.5 Watts per channel? Thanks in advance
1 Answer
HI Chris: There are other factors involved. Are you planning on using Volume Controls with this speaker selector (recommended to handle Impedance matching) or depending on the protection switch on the unit itself. When using the internal protection you will notice the power output is cut in half just because you are sending the audio signal through the internal transistors.What amplifier are you planning on using also is another factor. As an example we do not recommend using the zone 2 output of a Audio Video Receiver to drive a Speaker Selector with 8 pairs of speakers (neither does any of the Receiver manufacturers either according to most Owners manuals). We sell many AMP200 and AMP300 which are true audiophile quality High Current Amplifiers that do not limit their output when the impedance drops from 8 to 4 and even 2 ohm. So the point is there are additional variables when trying to calculate how much wattage is delivered to each speaker. TL/3141
Submitted by: Customer Service - Q&A on February 12, 2015

Khurram Humaiyun
from Rawalpindi, Pakistan asked:
September 1, 2014
Can I connect each speaker with an Impedance matching speaker volume control Knob
1 Answer
Hi Khurram, This speaker selector has built in impedance protection which you can either enable or disable. If you want to use impedance matching volume controls for each zone, you would want to disable the impedance protection on the speaker selector itself.
Submitted by: Customer Service - Q&A on September 3, 2014

from pembina, nd. asked:
July 30, 2014
do you have this with volume control?
1 Answer
Hello Gord, The largest speaker selector with volume control that carry is our SSVC6 - 6 zone speaker selector with volume control.
Submitted by: Customer Service - Q&A on July 31, 2014

from DYER INDIANA asked:
June 6, 2014
can i connect this to a onkyo 2 channel amplifier to get better sound to my 6 speaker zones cause im having to raise the volume controls all the way up to get good sound
1 Answer
Hi Sal, It isn't recommended because that receiver is only built to handle a pair of 8ohm speakers. If you add more than a pair, you'll be lowering the impedance to 4ohms, 2ohms and below. Even with the impedance protection of the speaker selector, the receiver will still see an unstable load. What you would need to provide ample power to your 6 zones would be our AMP200 or AMP300. Each of these can be used in line with speaker selectors. Let us know if you have questions. Thanks! BM 2736
Submitted by: Customer Service - Q&A on June 10, 2014

from Orange County asked:
April 21, 2013
I have an Onkyo 616 receiver that I will be using to power a 7.2 outdoor surround sound system in my 5500 sq/ft backyard. I already have seven RS800 rock speakers from you guys for this. In addition, I will also be powering 8 additional speakers in different zones of the backyard. My plan was to buy AMP200 to power the 4 pairs of speakers, and an SMP250 to power 2 8 ohm outdoor subwoofers. My two subwoofers are going to be on opposite sides of the outdoor theater and I will need a way to control the volume levels of the subwoofers to allow proper integration. If I was using the SMP250 to power the two subwoofers I don't think I would be able to control the levels of the subwoofers independently of each other which is where I think the DSM8 would come in. Could I run both amps to the speaker selector and control the levels to the 4 pairs of speakers and 2 subs? In a somewhat related question, if one pair of the speakers ran by amp200 was with the center channel of the 7.2 system would the sound from each speaker be ouptut without any delay in sound? Hopefully that makes sense. In other words, would the center channel being powered by the onkyo receiver be ouptut at the same time as the two speakers being powered by AMP200. I don't think that the amp200 powered speakers would add to the center channel volume because they would be played in stereo fashion instead of integrated into the 7.2 system. How would I increased the volume by the center channel during movies without just increasing the gain in the Onkyo 616 of the center channel? Thanks.
1 Answer
Hi Matt, Subwoofer location will take some experimentation to find the ideal spot for the maximum bass for your prime viewing/listening area. Try and find a prime location with a single amp first but keep in mind that the best way to get more control over each subwoofer is to purchase a Subwoofer Amplifier for each. Regarding the other speakers for your spacious backyard, we recommend adding an outdoor volume control for each pair of speakers and using a DSM4 speaker selector to connect the four pair of speakers connected to the Onkyo with the AMP200 on Zone number 2. Your other choice is to connect the AMP200 to a SSVC4 speaker selector with the Volume Controls built in so you can do your impedance matching while also controlling all four zone volumes from a central location. There is no dedicated center channel pre-amp out for the Onkyo so we’re not sure you will be able integrate it with your second zone stereo outputs. We assume you will just be adding fill when selecting the second zone. You should not experience any latency between the 7.2 surround sound and Zone 2 simulated stereo surround, but that is a question for ONKYO. TL/MA 1819
Submitted by: Customer Service - Q&A on April 26, 2013

Ian V
from Louisiana asked:
September 29, 2012
Is there a remote that controls this unit?
1 Answer
Hi Ian, This unit does not include a remote. However, we do have a 7-zone speaker selector, the ATM-7, with remote. It is a single source, unlike the DSM8. CL/MA 1313
Submitted by: Customer Service - Q&A on October 1, 2012

from Los Angeles, CA asked:
July 17, 2012
How to connect the subwoofer output from a receiver to this selector?
1 Answer
Hi Henry: Most Receivers only feature Pre-amp subwoofer output which needs to be connected to an external amplifier or a Powered Subwoofer. We would need additional information on what your application, so we can understand why you want to connect your subwoofer to the DSM8. TL
Submitted by: Customer Service - Q&A on July 18, 2012

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