Zapco Studio X Series - Manual (Page 18)

Specifications
ST-2X 1
70 Watts RMS
Max RMS at 2Ohms @ <.5% THD at 1KHz 2 x 85 watts / 1 x 1
70 watts
*Rated RMS Power 50w x 2 @ 4Ω / 80w x 2 @ 2Ω / 160 w x 1 @ 4Ω Mono
STHD + Noise < 0.05%
Signal to Noise Ratio > 85dB
Channel Separation > 60dB
Frequency Response 15Hz to 30KHz ±1dB
Input Sensitivity .25v to 5v
ST-4X 4
20 Watts RMS
Max RMS at 2 Ohms @ <.5% THD at 1KHz 4 x 105 Watts / 2 x 2
10 watts
*Rated RMS Power 60w x 4 @ 4Ω / 80w x 4@ 2Ω / 180 w x 2 @ 4Ω Mono
STHD + Noise < 0.05%
Signal to Noise Ratio > 85dB
Channel Separation > 60dB
Frequency Response 15Hz to 30KHz ±1dB
Input Sensitivity .25v to 5v
ST-5X
720 Watts RMS
Maw RMS at 2 Ohms @ <.5% THD at 1KHz 4 x 120Watts Plus 1 x 240 Watts
*Rated RMS Power 60w x 4 @ 4Ω plus 240 w x 1
100w x 4 @ 2Ω plus
240 w x 1
STHD + Noise < 0.05%
Signal to Noise Ratio > 85dB
Channel Separation > 60dB
Frequency Response 15Hz to 30KHz ±1dB
Input Sensitivity .25v to 5v
* Rated RMS Power taken all channels driven and all frequencies