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SKU: OSD-TSM8 TSM8 Dual Source 8-Zone Speaker Selector with Amplifier Protection Circuitry and Removeable Input/Ou

Purchase TSM8 Dual Source 8-Zone Speaker Selector with Amplifier Protection Circuitry and Removeable Input/Ou
  • SKU: OSD-TSM8 transformer-speaker-selector

    TSM8 Dual Source 8-Zone Speaker Selector with Amplifier Protection Circuitry and Removeable Input/Ou

  • $99.95

    Compare at: $149.99 You Save $50.04

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Designed for whole-house audio systems or commercial/retail environments, the TSM8 is a powerful yet affordable dual source zone speaker selector that allows you to connect up to eight pairs of speakers (eight listening zones) and select the zones with front panel push-button controls. A passive device that connects to a high-current amplifier and is compatible with in-wall volume controls, the TSM8 speaker distribution system also includes dual source switching (A/B) so you can choose between two audio amplifiers as well as individual on/off switches for each zone. 

  • Distributes audio from an amplifier to up to eight pairs of speakers
  • Manually-activated power protection circuitry ensures amplifier stability
  • Provides maximum power handling and ultra-high-quality signal transmission
  • Autoformer-based operates more efficiently than resistor -based selectors
  • Includes front-panel A/B switch to drive speakers from either of two amps
  • Play one pair, a combination of pairs, or all eight pairs simultaneously
  • Removeable, color-coded snap-in connectors for easy installation' Includes custom die-cut labels to identify each listening zone
  • Compatible with all high-current amplifiers' High quality construction with two-year warranty 
Equipped with Impedance Protection
This high-power speaker selector is equipped with a low-frequency protection circuit to reduce subsonic signals so you can drive multiple pairs of speakers without going below safe impedance ratings. Going below the impedance rating can overheat or even damage expensive equipment or cause the amplifier to automatically shut off. The TSM8 utilizes audio-grade impedance-matching autoformers to safely distribute maximum power throughout your system, and a rotary switch located on the rear panel can be used to set the appropriate impedance to be seen by your amplifier based on the number of pair of speakers connected. 

Ease of Use and Installation 
Accepts up to 14-gauge speaker wire, the TSM8 includes removable 4-pole color coded snap-in amplifier and speaker connectors for ease of installation when terminating. Another feature popular with our customers are the included die-cut labels that can be attached to each button to identify each listening, for example kitchen, patio, etc.

Warning: California's Proposition 65


This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

  • Speaker Selector Type: 8 Zone Dual Source w/ Autoformer Amp Protection
  • # of Zones or Speaker Pairs: 8
  • Dual Source
  • Power Handling: 100W Per Channel RMS, 300W Peak Per Channel
  • Low-frequency Protection: Bipolar Capacitor Circuit 6 dB High-Pass Filter, Centered at 30 Hz
  • Input Source: Up to 2 Amplifiers or Receivers
  • Minimum Speaker Impedance: 4 Ohms
  • Impedance Protection: Yes
  • Input/ Output Connector Type: Removable Spring-loaded Guillotine-style Push Terminals
  • Wiring Requirement: Up to 14 Gauge Wire
  • Dimensions (L x H x D): 17" x 2.87" x 8.25"
  • Weight: 7.5 lbs
  • Warranty: 2 Years
8 Questions asked
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John • 12/17/2019, 2:17:43 PM Should I be able to test the ohms coming out with a multi-meter? I have installed this box for my system and have 8 speaker pairs hooked up to it. The speakers are 8 ohm speakers and the amp is an 8 ohm amp. If I understand correctly, after I have all 8 speaker pairs hooked up and I turn the dial to 8 speaker pairs, I should be able to test the Ohms coming out of the Amp by putting the multi-meter into the Amp A or Amp B circuitry. Unfortunately, I'm getting a reading of 0 ohms so I'm assuming something is wrong.
Customer Service • 12/17/2019, 2:17:43 PM
Hi John, You would not get an accurate reading from the speaker output on an amp. The TSM-8 has impedance matching; therefore, the speaker selector will appear (to the amp) as an 8 ohm load. Do you have everything hooked up? How does it sound? CL/MA 1293
Mark Warden • 12/17/2019, 2:17:43 PM I have just purchased one of these from recommendation from an asked question of somebody else, for use with my soon to arrive Sonos Connect system. I want to use my Sonos Connect to feed my own amp (yet to buy) which will then feed this TSM-8 which will distribute for the time being to just 3 different rooms, two speaker in each room all 8 ohms via wall mounted volume controllers. Is this going to work!? Will I be able to run as many of the 3 rooms as I like at a time with flexibility to add 5 more in the future?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Mark, The SONOS connect amp will not drive a speaker selector. It is meant for as many speakers for which it has outputs. For 8 pairs, you would need our AMP300 in conjunction with the TSM-8 speaker selector. CL/MA 1828
Jim • 12/17/2019, 2:17:43 PM I have a situation where I need to connect 2 of these units to the same amplifier. How will this affect the load seen by the amp? All of my speakers are 4 ohm on both Autoformers. My amp is 4 ohm stable. Would I set each unit so that independently, they would provide an 8 ohm load, thus when combined on the input channel, the load would be 4 ohm to the amp? Pls help. I do not want to let the MAJIC (smoke) out of my sound system.
Customer Service • 12/17/2019, 2:17:43 PM
HI Jim: Trying to use just one Speaker Selector (no volume controls) with all 4 ohm speakers with the Protection switch set to 7-8 speakers will most likely show a 4 ohm load coming from the box to the Amplifier. So you will already put more demand on the Amp. We would need to know what amplifier you are using and if it is considered High Current capable (which usually gives a 2 ohm rating in the specs). The safest solution is to add a High current amplifier like our AMP300 to drive the first box then connect the second existing amplifier to the line 2 output of the AMP300 (making sure to connect your source to line 2 input of the AMP300). The key is the 4 ohm speakers and how they double the current draw from your components. If you were to add impedance matching volume controls you would need to go with our VSM-300 which features a 16x setting which is what (8) four ohm pairs would need to be set at. TS-2156
Jim • 12/17/2019, 2:17:43 PM I am connecting a 7.2 receiver to 13 speakers. zone 1 will be the main 5 speakers and a subwoofer on the surround side of the receiver.... On zone 2, I want to use the TSM-8 for the remaining speakers, actually 3 different pairs and 3 singles, all with impedance matching volume controls. will this work for me?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Jim, I would not suggest running a zone B on a receiver to a speaker selector. Usually that channel is powerful enough for a pair of speakers. If you try to power more than one pair through the speaker selector, you would overwork your receiver and possibly damaging it. I recommend using RCA to run from your receiver into an amp, like our AMP300, then from the amp to the speaker selector. CS 3060
Mark • 12/17/2019, 2:17:43 PM I have 5 VMS300 VC's controlling 5 pair of 8ohm speakers. If I use this TSM-8 selector, what do I set the impedance matching switch to in each VC and what do I set the number of speaker pairs knob to on the back of the selector?
Customer Service • 12/17/2019, 2:17:43 PM
Hi Mark, Well, that's a bit tricky since both components have impedance protection. Ideally you would want to run the impedance matching from only one component (i.e., speaker selector OR volume controls). I would set each vc to 1/2x and then set the speaker selector to the appropriate number of speakers running.