audio research
CLASSIC 150

Description
Hybrid tube/FET mono power amplifier.

Introduced
1988/1989 ?

Discontinued
?

Revisions
-

Options
Balanced inputs ($200/pair)

MSRP (US new retail)
$9,990/pair

Specifications

Power output 140 watts minimum continuous at 8 ohms from 10Hz to 20kHz with less than 0.8% total harmonic distortion (typically below .005% at 1 watt). Approximate actual power available at "clipping": 150 watts (1kHz).
Power bandwidth (-3dB points): 7Hz-100kHz
Frequency response  
Input sensitivity .6V RMS for rated output
Input impedance 60K ohms, nominal
Output taps 2, 4, 8 ohms
Output regulation Approximately 0.3dB, 8 ohm load to open circuit
Overall negative feedback 20 dB
Damping factor Approximately 30
Distortion  
Slew rate 25V/µs
Rise time 2 µs
Hum & noise Less than 2mV RMS 90dB below rated output (broad-bandwidth unweighted, inputs shorted)
Power supply energy storage Approximately 350 joules
Power requirements 105-125 VAC 60Hz (210-250 VAC 50Hz) 650 watts at rated output, 440 watts at "idle". 145 watts at "standby"
Tube complement (4 matched pairs) 6550
Other  
Dimensions 19" W by 10.5" H by 16" D
Weight  

Reviews

Issue 56 (Special Report)
Vol. 14 No. 11

Pictures