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Condition is unknown, so the price hinges a bit on cosmetics, tested status, and whether all controls are quiet, but at US$130 this sits below the US$135 25th percentile and well under the US$150 median for recent comparable listings. That makes it a strong buy-side number rather than a stretch, especially for a piece of vintage preamp gear that still has real appeal.
The GTP-350 is a respected, straightforward ADCOM preamp with the kind of clean, punchy presentation many vintage hi-fi fans still like, and it can be a very satisfying hub for a simple two-channel system. If it powers up cleanly and the switches/pots are healthy, this is the sort of listing that rewards a quick decision more than a long debate.
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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