4 Pair Single Source Impedance Matching Speaker Selector

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The SS-4.2 offers two operating configurations: Impedance Matching and Bypass. Impedance-matching mode provides automatic overload protection for use even with high-power amplifiers. This mode allows multiple pairs of speakers to be safely connected to an amplifier using the built-in automatic impedance-matching circuitry.

Bypass mode is used for direct speaker switching with remote impedance-matching volume controls. This allows local control in each room as well as higher efficiency; however, in this mode the impedance matching and overload protection are not engaged.

Designed for use with 8-ohm loudspeakers, the SS-4.2 also provides safe connection to bridged amplifiers and even works in applications where there is a floating ground. It has spring-loaded speaker terminals for quick connection and can accommodate speaker wire up to 12 gauge.


  • Designed for high audio quality and long-term reliability
  • "Provides impedance matching and automatic overload protection compatible with high-power amplifiers
  • Bypass mode allows direct speaker switching when using remote impedance-matching volume controls
  • "Ten-year parts and labor warranty


  • Shipping Dimensions: 11.8" (W) x 2.5" (H) x 10.3" (D), (29.8 x 6.4 x 26.0 cm)
  • Shipping Weight: 2.5 lbs (1.1 kg)
  • Connector(s): Spring terminals
  • Frequency Response: 20 Hz - 20 kHz +/- 0 dB
  • Max Wire Size: 12 AWG (2.4 mm)
  • Power Handling: 100 watts per channel peak, 100 watts per channel RMS

Extra Information