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Black rectangular speaker selector with six zone buttons and screw terminals

Monoprice Inc.

Monoprice 138158 6-Channel Speaker Selector, Impedance Protection, 12-16 AWG, Zone Buttons

SKU CH-PJP0-DC48A

Connect up to six speaker pairs to one amplifier with automatic impedance protection, 100 watts RMS per channel, individual zone buttons and 12-16 AWG screw terminals

  • TypeSpeaker Selector
  • Weight3.17
  • FeaturesConnect and safely control multiple speaker pairs with a sin
  • Connect up to six speaker pairs from one amplifier
  • Automatic impedance protection keeps amplifier load safe
  • 100 watts RMS per channel power handling
  • Individual zone on/off buttons for independent control
  • Heavy-duty screw terminals accept 12-16 AWG wire

Connect six speaker pairs

The Monoprice 138158 selector lets you connect up to six pairs of 4-ohm or 8-ohm speakers to a single amplifier. Automatic impedance protection circuitry maintains a safe load for the amplifier at all times. Individual push buttons on the front panel allow independent on/off control for each zone. Heavy-duty screw-type connectors accept 12-16 AWG speaker wire.

Impedance limits per zone

With all six zones active, the selector presents a 4.6-ohm minimum load when using 4-ohm speakers and a 5.3-ohm minimum with 8-ohm speakers. The unit handles up to 100 watts RMS per channel. Exceeding these impedance or power ratings risks amplifier shutdown or damage. The resistor-based design reduces overall output level compared to a direct connection.

Check amplifier compatibility

Verify your amplifier or receiver is stable at the minimum impedance figures above for the speaker type you own. Confirm the amplifier’s continuous power per channel does not exceed 100 watts RMS. Ensure you have 12-16 AWG speaker wire for the screw terminals. The unit weighs 3.17 units and requires adequate ventilation space.

Highlights

  • Connect up to six speaker pairs from one amplifier
  • Automatic impedance protection keeps amplifier load safe
  • 100 watts RMS per channel power handling
  • Individual zone on/off buttons for independent control
  • Heavy-duty screw terminals accept 12-16 AWG wire

Specifications

BrandMonoprice
Model138158
Part Number138158
TypeSpeaker Selector
Weight3.17
FeaturesConnect and safely control multiple speaker pairs with a single amplifier. Automatic impedance protection circuitry.

Questions about this item

Should I run 12 AWG or 16 AWG speaker wire with the SS-6 selector?

Both 12 AWG and 16 AWG are supported; use the heavier 12 AWG for longer runs to keep resistance low, and 16 AWG for shorter distances.

What does the 100 watts RMS per channel rating mean for my amplifier?

Each of the six channels can pass up to 100 watts RMS, so the selector will not limit an amplifier delivering that power to any connected zone.

How does the impedance protection affect the load my amplifier sees?

With six 4-ohm pairs active the selector presents a 4.6-ohm minimum load; with 8-ohm pairs it presents 5.3 ohms, keeping the amplifier within safe limits.

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