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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: $199.95 You Save $100.00


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

Maura • 12/17/2019, 2:17:43 PM Q Hi, I have 5 pairs of 8Ohm speakers matched to a 4 ohm amplifier. I will wire my speakers in parallel which will bring them down to 4ohms- so what is the setting I would need to set this selector to in order to match the ohms?
Customer Service • 12/17/2019, 2:17:43 PM
A Hi Maura: You have 5 pair of 8 ohm speakers that would connect to the TSM-8 speaker selector. I am assuming you are not using volume controls in any of the 5 zones. With 5 speakers connected you will set the protection to 5. This will show a 8 ohm load to your amplifier. Depending on your amplifier which you say is 4 ohm the 5 setting will be the safest. If your amplifier is a true high current amplifier with all discrete components and is 2 ohm stable you could get away with a lower setting on the TSM-8 either 3-4 or even 2 speakers. That way you will get your amplifier to operate at 4 ohm getting more audio output. Note; if you use the on/off switch per zone it will affect the impedance as well. Also if you are connecting any volume controls per zone make sure they are set to 1/2x. Let the TSM-8 control the protection. Good luck TL/4137
ben-Nabiy Derush • 12/17/2019, 2:17:43 PM Q Is there a 70V version of this?
Customer Service • 12/17/2019, 2:17:43 PM
A Hi ben-Nabiy: This is not a 70V speaker selector. WE are developing a true Mono 70V 2 zone speaker selector with through output so you can stack multiple 2 zone selectors (you would need 4 to equal 8 zone TSM-8). It features 2 of our MVC-100 100 watt mono 70V Mono Volume Controls. It features an on/off switch for both zones. A single input an a direct pass thru for adding an additional speaker selectors or our MVC Volume Controls which feature a pass thru output as well. We hope to have these available by June 2017. TL/4312 You can also checkout our SPW8 which is an 8 zone patch bay, strictly a Parallel connection box, 8 stereo zones, no internal protection.
david • 12/17/2019, 2:17:43 PM Q Will my Yamaha RX-V890 340 watts run this system?
Customer Service • 12/17/2019, 2:17:43 PM
A Hi David:The TSM8 can connect directly to your Speaker Output either A or B. The TSM8 has internal Transformers for protection along with a choice of protection settings depending on how many speakers you will have connected and played at the same time. The question I have are you connecting other speakers to the Yamaha RX-V890 or just the TSM8? And if so, how many and what brand and model of each?tim@osdaudio.comTL/5590