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This is an Adcom GFA-5300 Power Amp from 1996. Like most Adcom equipment, it features a no-frills design that packs a secret wallop in the power department, which makes it a highly sought-after amp in the second-hand market. Don't confuse 'no-frills' with cheap or weak because this thing is heavy, with a robust build quality. It's a highly-regarded 2-channel MOSFET power amplifier introduced around 1994, delivering 80 watts per channel into 8Ω. Known for its clean, "fast," and musical sound, it is an evolution of the classic GFA-535, featuring improved components and better heat management. This particular unit shows some minor signs of use, mainly some chassis scratches as shown in the photos, we rated it as Very Good.Power Output: 80W RMS per channel into 8Ω, 125W+ RMS per channel into 4Ω.Design: MOSFET-based, high-current, direct-coupled design for improved speaker control.Total Harmonic Distortion (THD): Very low, typically 0.02% (20Hz-20kHz).Signal-to-Noise Ratio (SNR): 100dB.Versatility: Capable of driving low-impedance, electrostatic, and hybrid speakers.Bridgeable: Can be configured for mono operation for higher power output.Dimensions: 17" W x 4" H x 11.5" D, weighing approximately 22 lbs. Service History: No service records were included from the prior owner. Here at the shop we did routine testing, cleaning and inspection, but no repairs were needed.Cosmetic Condition: Overall we rated this at Very Good, with few signs of wear, beyond the scratches shown.In the Milwaukee Area? Stop in our shop to inspect/demoSee our feedback and thank you for considering. All the gear we sell is packaged with great care for safe arrival in the condition advertised and backed up by our 14 day full refund policy in the event you are not happy for any reason.
Against the typical used market at US$200 median, US$265 is above the middle of the pack and into the upper quartile, but it is not so far above the US$250 75th percentile that I’d call it extreme. In plain terms: this is a bit ambitious, not a bargain, and the asking price should really be justified by strong condition, fresh service, or extras.
The appeal here is the usual ADCOM formula: solid, no-nonsense power with a good reputation for grip, drive, and honest dynamics, which makes these amps easy to like in real systems. If the unit is clean, fully working, and has been cared for, that can make US$265 a reasonable enthusiast buy; if condition is only average or unverified, I’d want more confidence before paying above the median.
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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