RADAR is a price search engine. We link to the original listing — we never sell direct. Transactions happen on the source site.
This US$230 listing for the used Adcom GTP-500 preamplifier is a strong deal, sitting well below the 25th percentile of US$250 and nearly US$70 under the median of US$299 based on 16 recent comparable listings. You are paying significantly less than the typical used market for this model, making it an excellent buying opportunity if the unit functions as described.
The GTP-500 is a well-regarded 2-channel preamp/processor known for clean signal handling, a dedicated phono input, and versatile tape monitors, often favored by budget audiophiles for its solid performance relative to cost. At this price, even minor age-related quirks are easily justified, and the upside of securing a functional, well-loved vintage unit for under US$250 is substantial. Unless there’s a confirmed failure or missing critical accessories, this is a smart buy for anyone building a reliable analog front end without overspending.
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.
