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Classic Adcom GFA-555 high-current stereo power amplifier in good working condition. This legendary amplifier delivers powerful, clean performance and is highly regarded among hi-fi enthusiasts. Tested and fully functional. SpecificationsPower output: 200 watts per channel into 8Ω (stereo)Frequency response: 10Hz to 20kHzTotal harmonic distortion: 0.02%Damping factor: 700Gain: 29 dBInput sensitivity: 1.4VSignal to noise ratio: 100dBDimensions: 178 x 432 x 349mmWeight: 25.9kgLocal pick up / inspection / purchase available at Archer High Fidelity in Falls Church, VA. We are a vintage sales and service specialist covering the Washington DC metro area.All major credit cards accepted, as well as PayPal, check on clearing, and Venmo.Any other questions, please feel free to ask.
US$495 is a strong deal, sitting below the 25th percentile of US$480 for this model. Based on 29 recent comparable USD listings, the median asking price is US$550, with the 75th percentile at US$625, making this US$495 listing a genuine bargain in the current used market.
The Adcom GFA-555 is a legendary class-AB powerhouse delivering 200 watts into 4 ohms and 125 watts into 8 ohms, renowned for its clean, dynamic sound and robust build. It offers tremendous upside for the price, packing high-end performance that once cost US$600–US$800 new. Unless the unknown condition hides major issues like blown caps or failed rails, this is a clear buying opportunity for anyone seeking serious power without the vintage markup.
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.
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