Speco Technologies SPC-P500A 500W Class D Power Amplifier

Single speaker output works with either 70V and 8 Ohm speakers
Auxiliary inputs and outputs to "daisy-chain" amplifiers
Class D amplification
Built-in rack mount
500W RMS/1000W Max Power
AC 110V-120V, 50/60Hz
Power Consumption: <720W
Frequency Response: 70Hz~18kHz
Input sensitivity: 1.2V
Input impedance: 20K Ohm
Signal to noise ration: >90dB
Non-linear distortion: <0.1% (1kHz, 1/3 nominal output power)
Operating conditions: 95% RH, 0-104?F (with no condensation)
Storage temperature: 14?F~130?F
Auxiliary inputs: 1 XLR and 1 Screw Terminal (only one can be used)
Line Outputs: 1 XLR
Auto-detecting 70V or 8 Ohm speaker output
Master volume control