Audio Research - VT80SE

POWER OUTPUT  
75 watts per channel continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at 75 watts, below 0.05% at 1 watt. (Note that actual power output is dependent upon both line voltage and ‘condition’ i. e.: if power line has high distortion, maximum power will be affected adversely, although from a listening standpoint this is not very critical.)

POWER BANDWIDTH
(-3dB points) 7Hz to 60kHz.

FREQUENCY RESPONSE
(-3dB points at 1 watt) 0.7Hz to 80kHz.

INPUT SENSITIVITY
1.4V RMS BAL for rated output. (25dB Bal gain into 8 ohms.)

INPUT IMPEDANCE
300K ohms Balanced (150K ohms SE)

OUTPUT POLARITY
Non-inverting. Balanced input pin 2+ (IEC-268)

OUTPUT TAPS
8 ohms, 4 ohms

OUTPUT REGULATION 
Approximately 1.0dB 8 OHM LOAD TO OPEN CIRCUIT (Damping factor approximately 8)

OVERALL NEGATIVE FEEDBACK
15dB

SLEW RATE
10 volts/microsecond