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Vintage ADCOM GTP 500 II Pre-amp/Tuner w/Original Adcom Remote.Lightly Used, always cared for by one audiophile owner. Includes Original Boxes and Manual. Quality shipping and excellent seller reputation.Great analog sound and joy in operation.
US$349 is a bit ambitious versus the recent used market, which centers at US$255 with US$220 at the 25th percentile and US$345 at the 75th. It’s not wildly out of line, but it’s priced right at the top end of what comparable asks have been landing at.
That said, the GTP-500 has a solid reputation as a straightforward, good-sounding preamp with the kind of clean, punchy presentation Adcom gear is known for. If this one is tidy, fully functional, and includes the right accessories, it can still be a worthwhile buy for someone who wants an honest vintage preamp rather than a cosmetic project. At this price, though, I’d want clear proof it’s been serviced or at least thoroughly checked, since age-related noise, switching issues, and tired controls are the main things to watch.
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.
