Specifications - Audio Research High Definition Reference 80S User Manual

Power Output: 70 watts continuous from 20Hz to 20kHz. 1kHz total harmonic distortion typically 1% at
140 watts (33 watts in Triode mode) per channel, below 0.04% 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 critical)
Power Bandwidth: (-3dB points) 7Hz to 68kHz
Frequency Response: (-3dB points at 1 watt) 0.7Hz to 94kHz
Input Sensitivity: 1.4V RMS Balanced for rated output. (25.5 dB gain into 8 ohms);
0.7V RMS SE for rated output.
Input Impedance: 300K ohms Balanced, 75K ohms Single Ended
Output Polarity: Non-inverting. Balanced input pin 2+ (IEC-268)
Output Taps: 16 ohms, 8 ohms, 4 ohms
Output Regulation: Approximately 1.0dB 16 Ohm Load to Open Circuit
(Damping factor approximately 8)
Overall Negative Feedback: 15dB
Slew Rate: 10 volts/microsecond
Rise Time: 4.0 microseconds
Power Requirements: 105-130VAC 60Hz (210-250VAC 50Hz) 420 watts at rated output,
280 watts in Triode mode, 221 watts at "idle", 3.6 watts off Units for Japan: 100VAC 50/60Hz
Tubes Required: 2 matched pair KT150 (Power output V1-V4); 2 6H30 (Gain stage V5, V6)
Dimensions:
Width 18.5" (47 cm) chassis; 19.0" (48.26 cm) faceplate.
Height 10.5" (26 cm)
Depth 18.5" (47 cm)
With handles & connectors: 21" (53.3 cm)
Weight: 62 lbs. (28.2 kg) Net; 73 lbs. (32.7 kg) Shipping.

Specifications

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