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The Adcom GFA-545 is a classic, high-performance stereo power amplifier introduced in the late 1980s. Designed by the legendary audio engineer Nelson Pass, it is celebrated in the audiophile community for delivering high-end, clean, and dynamic sound at an affordable price point.SpecificationsPower output: 100 watts per channel into 8Ω (stereo)Frequency response: 10Hz to 20kHzTotal harmonic distortion: 0.04%Damping factor: 400Gain: 27 dBInput sensitivity: 1.25VSignal to noise ratio: 110dBSemiconductors: 38 x transistors, 2 x zener diodes, 12 x diodes, 2 x IC, 2 x diode bridgesDimensions: 138 x 432 x 310mmWeight: 11kgLocal 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.
What you should ask is: does this land at a fair buy-in, or is it cheap enough to move fast? At US$299, it sits right on the median of the recent US$250 to US$343 comparable range, so this is a fair, market-level ask rather than a bargain or an overreach.
That makes it a sensible pickup if it’s clean and operating properly. The GFA-545 has a solid reputation for punchy, high-current drive and a smooth, unfussy sound that pairs well with real speakers, not just easy loads. With condition unknown, the main value question is straightforward: if it powers up quietly, hasn’t been abused, and the seller can confirm basic function, it’s a good used-hi-fi buy at this 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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