One of the best stereo amplifiers of it's time. Designed by Nelson Pass, this high power and high current design can take your speakers to the next level with soundstage and detail. The GFA-555 can drive speakers with even the most difficult loads, to levels that most amps can't handle. This piece is in excellent overall condition, and tested well.
- Production
- 1990-95
- Condition
- 9/10
- Serial No.
- 83634582
- Orig. MSRP
- $599
- Restoration
- Full 30-point service check
- Cleaned controls, switches, and chassis
- Factory Specs
Power output 200 wpc into 8Ω at less than 0.04% THD (stereo), 600 watts into 8Ω at less than 0.09% THD (mono)
Dynamic Headroom 2.5 dB @ 4Ω
Power Bandwidth 1.7-100,000 Hz @ -3 dB
Frequency response 10Hz to 20kHz
Total harmonic distortion 0.04%
Damping factor Not less than 800 from 20-20,000 Hz into 8Ω
Gain 27 dB
Inputs 100kΩ; two gold-plated, Teflon-insulated brass RCA jacks
Input sensitivity 1.75V
Signal to noise ratio 110dB
Semiconductors 42 x transistors, 2 x zener diodes, 13 x diodes, 2 x IC, 2 x diode bridges
Dimensions 17"W x 7.25"H x 12.25"D
Weight 35 lbs.
- Designer
- Nelson Pass
- Documentation
ADCOM GFA555 Service Manual
- Liner Notes
The Adcom GFA-555 represents the most advanced thinking in audio amplifier design. At 200 watts per channel, it offers exceptional value and superior performance at a reasonable price.
- Stock No.
- 7675179040989
One of the best stereo amplifiers of it's time. Designed by Nelson Pass, this high power and high current design can take your speakers to the next level with soundstage and detail. The GFA-555 can drive speakers with even the most difficult loads, to levels that most amps can't handle. This piece is in excellent overall condition, and tested well.
