St-1B Speaker Wiring; Technical Specifications - zapco ST-2B Owner's Manual

The ST-1B has two + and two - terminals so you can hook up one woofer or two.
One woofer can be 2Ω minimum. Two woofers must be 4Ω minimum each.
2Ω Min
ST-2B
Power @ 4Ω: 2 x 65 watts
Power @ 2Ω: 2 x 90 watts
Power @ 4Ω Bridged: 180 watts
THD @ Rated Power < 0.1%
Signal to Noise Ratio > 97dB
Channel separation > 45dB
Freq. Response 20Hz-20KHz ±1dB
Input Sensitivity .25v to 5v
Dim. in mm: 182(W) x 52(H) x 200(L)
Overall: 182(W) x 52(H) x 230(L)

ST-1B Speaker Wiring

Technical Specifications

ST-4B
Power @ 4Ω: 4 x 65 watts
Power @ 2Ω: 4 x 90 watts
Power @ 4Ω Bridged: 2 x 180 watts
THD @ Rated Power < 0.2%
Signal to Noise Ratio > 97dB
Channel separation > 45dB
Freq. Response 20Hz-20KHz ±1dB
Input Sensitivity .25v to 5v
Dim. in mm: 182(W) x 52(H) x 280(L)
Overall: 182(W) x 52(H) x 310(L)
ST-1B
Power @ 4Ω: 200 watts
Power @ 2Ω: 300 watts
THD @ Rated Power < 0.2%
Signal to Noise Ratio > 97dB
Input Sensitivity .25v to 5v
Dim. in mm: 182(W) x 52(H) x 280(L)
Overall: 182(W) x 52(H) x 310(L)
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