Basic specs on the amp are as follows .
- Input sensitivity for 60 W output - just under 1V (1V gives 66W)
- Gain - 27dB
- Frequency response (-3dB) - 10Hz to 23kHz @ 1W
- Harmonic distortion @ 1kHz - 0.05% (maximum typical)
- Open Loop Gain - 125dB (no load), 80dB (8 Ohm load)
- Input Impedance - 22k Ohm
- DC Offset - Less than 100mV (< 20 mV typical **)
- Noise - < 2mV at output (-80dB ref 50W unweighted)
Original from : http://sound.westhost.com/project03.htm