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Rectangular black audio selector box with four zone buttons and volume knobs

Monoprice Inc.

Monoprice 138159 SSVC-4.1 4-Channel Speaker Selector

SKU CH-2AEB-BNTK0

Connect up to four speaker pairs to one amplifier with individual volume controls, on/off buttons and automatic impedance protection

  • TypeSpeaker Selector
  • Weight6.94
  • FeaturesConnect and safely control multiple speaker pairs with a sin
  • Connect and safely control four speaker pairs from one amplifier
  • Automatic impedance protection circuitry maintains a safe amplifier load
  • 100 watts continuous and 200 watts peak power handling per channel
  • Individual zone on/off buttons with independent volume controls for each pair
  • Heavy-duty screw-type connectors accept 12-18 AWG speaker wire

Single-input four-zone speaker selector

The Monoprice 138159 SSVC-4.1 connects up to four pairs of speakers to a single amplifier or receiver. Resistor-based impedance matching circuitry maintains a safe load for the amplifier regardless of which zones are active. Individual push buttons on the front panel turn each zone on or off independently. Each zone also provides a dedicated volume control for local level adjustment.

Replaces basic speaker switches lacking protection

This unit upgrades installations that use simple selector switches without impedance management. The automatic protection circuitry prevents amplifier damage when driving multiple 4-ohm or 8-ohm speaker pairs simultaneously. Continuous power handling reaches 100 watts per channel with 200 watts peak capacity. The upgrade is worth it when adding a second, third, or fourth zone to an existing stereo amplifier.

Check amplifier impedance and wiring gauge

Verify the amplifier presents at least 5 ohms with four 4-ohm speakers selected or 6 ohms with 8-ohm speakers. Heavy-duty screw terminals accept 12 to 18 AWG speaker wire for each zone. Ensure the amplifier power rating suits the 100-watt continuous specification. The unit weighs 6.94 units and requires adequate ventilation space for the resistor network.

Highlights

  • Connect and safely control four speaker pairs from one amplifier
  • Automatic impedance protection circuitry maintains a safe amplifier load
  • 100 watts continuous and 200 watts peak power handling per channel
  • Individual zone on/off buttons with independent volume controls for each pair
  • Heavy-duty screw-type connectors accept 12-18 AWG speaker wire

Specifications

BrandMonoprice
Model138159
Part Number138159
TypeSpeaker Selector
Weight6.94
FeaturesConnect and safely control multiple speaker pairs with a single amplifier. Automatic impedance protection circuitry.

Questions about this item

What speaker wire gauges do the 138159's screw-type connectors accept?

The heavy-duty screw-type connectors on this selector support 12-18 AWG speaker wire for secure connections.

How do I connect the amplifier and four speaker pairs to the SSVC-4.1?

Connect your amplifier to the single input terminals, then run speaker wire from each of the four zone outputs to each speaker pair, ensuring correct polarity.

What maintenance does the automatic impedance protection circuitry require?

The protection circuitry is passive and requires no maintenance; simply ensure adequate ventilation around the unit during extended high-power use.

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