Description
Tube stereo power amplifier. Generally marked 'Electronic
Industries'.
Introduced
1969 (10-07-1969)
Discontinued
1973
Revisions
DUAL 50R-1 (12-04-1969)
DUAL 50R-2 (12-17-1969)
DUAL 50A (06-05-1970)
DUAL 50B (07-11-1970)
DUAL 50C
DUAL 50D (02-04-1971)
DUAL 50D-1 (05-10-1971)
DUAL 50E (06-22-1971)
DUAL 50F (07-26-1971)
DUAL 50F-1A (?)
DUAL 50F-1B (12-08-1971)
DUAL 50G
Options
-
MSRP (US new retail)
$440 (DUAL 50A/DUAL50B)
$540 (DUAL50B Unity Damping)
Specifications
| Power output | 50 watts RMS 30Hz/15kHz per channel |
|---|---|
| Power bandwidth | |
| Frequency response | ± 1 dB 25Hz/20kHz @ 50W RMS |
| Input sensitivity | 1.15V RMS for 50W RMS output |
| Input impedance | 500kOhms |
| Output taps | 4, 8 and 16 ohms |
| Output regulation | |
| Overall negative feedback | |
| Damping factor | Approximately 14 to 1kHz |
| Distortion | Less than .1% 1kHz/50W RMS |
| Slew rate | |
| Rise time | Approximately 20µs |
| Hum & noise | 90dB below rated output |
| Power supply energy storage | |
| Power requirements | 117V 50/60Hz, approximately 200 watts at idle, approximately 325 watts at full power |
| Tube complement | (2 matched pairs) GE6L6/KT-66/EL34, (3) 12AX7, (2) QA2, (4) 6FQ7 |
| Other | |
| Dimensions | 16" W x 9 1/4" D x 7 1/2" H |
| Weight | 38 lbs. Net, 45 lbs. Shipping |
Reviews
Pictures
DUAL 50:
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DUAL 50A:
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DUAL 50F-1B:
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