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For sale is an Adcom GFA-5400 stereo power amplifier. This amp is in excellent working condition and sounds really good. Cosmetically, it does show some signs of use such as scratches and small dents, which can be seen in the pictures, although it still remains in overall good shape. This is a solid, high current amplifier with plenty of power on tap, making it a great choice for driving a wide range of speakers with ease. It sounds fantastic with tight bass, clear highs, and plenty of headroom for dynamic music.SPECIFICATIONS:Power output: 125 watts per channel into 8 ohmsPower output at 4 ohms: 200 watts per channelFrequency response: 10 Hz to 20 kHzTotal harmonic distortion: 0.18%Damping factor: 500 Gain: 29 dBInput sensitivity: 1.125 VSignal-to-noise ratio: 100 dBDimensions: 5.4" H x 17" W x 14.8" DWeight: 26 lbs
# Buyer Notes: ADCOM GFA-5400
At USD$299, this is a solid buy—roughly USD$13 below your local market median of USD$312. The GFA-5400 is a workhorse Class AB amp from the 1980s–90s, typically holding USD$280–USD$350 used depending on condition and region. Your listing lands in the lower-middle of that range, which is fair given no specific condition detail was provided. If the unit is clean, cosmetically sound, and fully functional, you're not overpaying; if it shows wear or has been heavily used, you're still in reasonable territory.
Before committing, confirm the amp powers up cleanly with no hum, buzzing, or channel imbalance at low and mid volumes. Check that both channels deliver stable output and that the heatsinks run warm but not scalding—thermal shutdown is rare on these but aged capacitors can cause drift. Verify all XLR and RCA connectors are present and the IEC power inlet is intact. Ask the seller for service history; if it's been recapped in the last 10–15 years, that's a strong signal. Include the original manual and power cord in your deal if possible.
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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