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Specifications:
Power output: 60 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 20kHz
Total harmonic distortion: 0.04%
Damping factor: 180
Gain: 27 dB
Input sensitivity: 0.97V
Signal to noise ratio: 110dB
Semiconductors: 34 x transistors, 2 x zener diodes, 14 x diodes, 2 x IC, 2 x diode bridges
Dimensions: 86 x 432 x 317mm
Weight: 8.9kg
Repair:
Cleaned and Tested
DN8072625
With unknown condition, US$399 is on the ambitious side for this amp unless it has been serviced, recapped, or comes with standout provenance; typical used asks I found cluster more around US$130–US$250, with nicer examples sometimes reaching US$300+ and restored pieces higher.
That said, the appeal is real: the GFA-535 II is a respected 60Wpc high-current classic with a good reputation for grip, drive, and a lively sound that pairs well with efficient to moderately demanding speakers. If it’s clean, original, and fully working, it’s still a worthwhile vintage-buy candidate; at this price, I’d want clear confirmation of function, no channel imbalance or scratchy controls, and ideally proof of recent service before jumping in.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
ADCOM emerged in the 1970s as a family-owned American audio venture founded by audiophile Newt Channin, initially focusing on exceptionally musical moving-coil phono cartridges that set it apart from typical entrants. The brand quickly pivoted to electronics with the groundbreaking GFA-1 power amplifier in 1979, delivering 200 watts per channel and robust current for demanding speakers, propelling ADCOM into prominence during the high-fidelity boom of the 1980s and 1990s.
The company built its legacy on high-performance amplifiers, including the Nelson Pass-designed GFA-555 that garnered worldwide acclaim, alongside AV tuners, preamps, and multichannel power amps like the GFA-6000 tailored for home theater. While early roots lay in phono gear, ADCOM specialized in electronics offering superior sound quality without extravagant pricing, eschewing speakers, headphones, or extensive cabling lines.
Positioned firmly in the mid-fi realm, ADCOM defined accessible high-end audio for discerning buyers, blending value and performance that rivaled pricier competitors. After challenges and ownership shifts—including a Thai firm and a faltering 2010 relaunch—the brand staged a robust comeback in 2024 under J&B Distribution, reviving classics like the GFA-555ms alongside modern integrated amps and preamps, reclaiming its spot among savvy audiophiles seeking reliable, soul-stirring sound.
See all ADCOM listings on RADAR.
