RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
Are you looking for a genuine bargain on a serious vintage power amp? At US$500, this is below the recent comparable range: the 25th percentile is US$506, the median US$537, and the 75th percentile US$587. That makes it a strong deal, assuming it is functional and not hiding major cosmetic or service issues.
The GFA-555 II is well regarded for its substantial power delivery, high-current design, and confident control of difficult speakers; it remains a particularly appealing choice for someone wanting punch and scale without paying premium modern-amplifier money. The unknown condition is the only real reason to slow down: confirm both channels work cleanly, that it stays quiet as it warms up, and ask about bias adjustment, repairs, and the original faceplate and handles. At this price, a sound example is a buying opportunity.
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.
