Audio Research Reference 80S
The Reference 80S stereo amplifier continues Audio Research’s latest design effort in creating a vacuum-tube amplifier that not only redefines ultimate music reproduction, but does it in an incredibly beautiful package.
PRODUCT DETAILS
Technical Specifications
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
Physical Specifications
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.
