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ConditionUsed - GoodLate 90's vintage Power output: 250 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 20kHz Total harmonic distortion: 0.18% Damping factor: 1100 Gain: 29 dB Input sensitivity: 1.6V Signal to noise ratio: 100dB Dimensions: 216 x 432 x 362mm Weight: 25.6kgWould recommend recapping
Condition is unknown, but at US$629 this lands well below the US$757 25th percentile and far under the US$799 median, so it looks like a strong buy rather than a merely fair one. That’s enough cushion to make room for normal age-related servicing without turning it into an expensive gamble.
The GFA-5800 is well regarded for muscular, controlled solid-state drive and a clean, high-current presentation that suits speakers needing real grip. If the unit is complete and quiet, the upside is straightforward: a serious power amp at a bargain entry point, with classic Adcom performance that still earns respect.
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.
