audio research
DUAL 100

Description
Two chassis tube stereo power amplifier. Generally marked 'Electronic Industries'.

Introduced
1970

Discontinued
?

Revisions
DUAL 100-A

Options
-

MSRP (US new retail)
$1,500

Specifications

Power output At least 75 Watts RMS 30Hz to 15kHz
Power bandwidth  
Frequency response

±.1dB 30Hz to 15kHz at 1 Watt
±1dB 30Hz to 15kHz at 75 Watts

Input sensitivity 1.0 V RMS for rated output
Input impedance  
Output taps 4, 8, 16 Ohms
Output regulation From 16 Ohm resistive load to open circuit less than 1dB change at 1 kHz
Overall negative feedback  
Damping factor  
Distortion Harmonic distortion: Less than .15% at 1 kHz at 75 Watts
  Impulse distortion: Essentially none, 30Hz to 15kHz
Slew rate  
Rise time  
Hum & noise At least 80 dB below rated output
Power supply energy storage  
Power requirements  
Tube complement

Power supply: (4) 6080, (1) OB2, (2) OA2, (1) 6AU6, (1) 6CA7/EL34
Amplifier: (4) 6550, (6) 6CG7, (4) 12AX7

Other  
Dimensions Power supply chassis: 17" x 13" x 10½" H
Amplifier chassis: 17" x 13" x 8" H
Weight Power supply: 88 lbs.
Amplifier: 45 lbs.

Reviews

Pictures

DUAL 100:

DUAL 100-A: