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Adcom GFA5555 II amplifier in excellent conditionMinty.A 200-watts/channel beast.The Adcom GFA-555 II is a highly regarded, high-current solid-state stereo power amplifier known for producing 200 watts per channel (8 ohms) and driving difficult speaker loads with ease. It improves upon the original GFA-555 with superior grounding, faster thermal protection, and improved linearity to reduce distortion.Shipping to states in longitude of Colorado, farther west or rural parts of the Midwest will be a little more, billed separately
At US$550, this excellent-condition Adcom GFA-555 sits right at the median of the current used market, making it a fair price rather than a bargain, especially since the original 1985 retail was only US$599.95. While newer variants like the GFA-555ms now ask over US$1,300, the classic GFA-555 remains a solid value at this level, matching the 25th–75th percentile range of US$484 to US$619.
This amp is a beloved class-AB workhorse that delivers 125 watts into 8 ohms with high current and tight control, earning its reputation as a “great fucking amp” among enthusiasts. Its timeless audiophile sound, robust build, and bridgeable design make it a worthwhile buy for anyone seeking reliable power without modern markup. With no red flags in this clean listing and excellent condition, it’s a genuine buying opportunity at a fair price.
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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