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Adcom GFA-5400 Stereo Power Amplifier - 125 Watt Amp w/ Box & ManualFully tested and 100% functional; the GFA-5400 offers ample power and great sound. Cosmetically, it is excellent. Includes original box with packaging and owners manual.SpecificationsPower output: 125 watts per channel into 8Ω (stereo)Frequency response: 10Hz to 20kHzTotal harmonic distortion: 0.18%Damping factor: 500Gain: 29 dBInput sensitivity: 1.125VSignal to noise ratio: 100dBDimensions: 137 x 432 x 375mm
Condition is unknown, so this lands as a fair-to-ambitious ask rather than a clear bargain: US$378 sits right at the 75th percentile of recent US$ listings, above the US$300 median and just beyond the US$298–US$378 middle band. That’s not out of line for a desirable piece, but it’s priced at the top end of the current used market.
Worth buying if it’s clean, complete, and can be auditioned, because this is a respected high-current stereo amp with real drive and good authority on speakers that like grip and control. The upside is in finding one that’s been well cared for and hasn’t been abused; with older power amps, a quiet idle, stable bias, and original parts matter more than cosmetics. If it includes the right accessories and service history, the ask makes sense.
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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