audio research
DUAL 75

Description
Tube stereo power amplifier.

Introduced
1972

Discontinued
1975/1976 ?

Revisions
DUAL 75A (1973)

Options
Gold faceplate

MSRP (US new retail)
$995
$1,195 ? (DUAL 75A)

Specifications

Power output 75 Watts RMS per channel minimum into 4, 8, or 16 ohm load from 20 Hz to 15 KHz with less than 1% total harmonic distortion
Power bandwidth  
Frequency response  
Input sensitivity 1.5V for rated output
Input impedance 80K ohms at 20 Hz, 30K ohms at 15 KHz
Output taps  
Output regulation  
Overall negative feedback  
Damping factor 14 at 8 ohms (1 KHz)
Distortion  
Slew rate  
Rise time  
Hum & noise More than 80dB below rated output
Power supply energy storage  
Power requirements 100,120,200,240 VAC at 50-60 Hz, 550 Watts at rated output
Tube complement (4)12AX7, (8) 6FQ7, (2 matched pairs) 6550, (1) 5881
Other  
Dimensions 19" W x 7" H x 12¼" D
Weight 52 lbs.Net; 63 lbs. Shipping

Reviews

Number 3 (DUAL 75: Further Thoughts), Number 4 (DUAL 75A: Capsule)
Vol. 3 No. 3

Pictures

DUAL 75:

DUAL 75A: