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For sale is an Adcom GFP-710 stereo preamplifier in good working order. Note that it does not include the remote control. Cosmetically, it shows some slight wear on the top plate like some minor scratches, but the front panel, sides, and rear connections are in great condition with no major scratches or dings. Key features include a built-in moving magnet (MM) phono stage, multiple line-level inputs (like tuner, CD, aux, and more), dual main outputs, and remote-ready volume control for easy integration into your analog setup.This preamp delivers clean, detailed sound with low distortion and excellent signal-to-noise performance, classic Adcom reliability at a fraction of its original price. SPECIFICATIONS: Phono Stage: Built-in moving magnet (MM) phono input Inputs: 5-6 line-level inputs (including tuner, aux, CD, etc.) plus MM phono Outputs: 2 pairs of main stereo outputs (one fixed, one variable) Frequency Response: 20Hz-20kHz ±0.5dB (typical for Adcom preamps) Total Harmonic Distortion (THD): <0.01% at rated output Signal-to-Noise Ratio: >95dB (line), >80dB (phono) Voltage: 120V AC, 50/60Hz Dimensions: 17" W x 3" H x 10" D Weight: 15 lbs
Compared with spending US$299 on a generic modern budget preamp, this is the more interesting buy if you want a proper vintage two-channel control center with phono. For the GFP-710, that asking price looks fair to slightly strong, not a steal; it sits in the zone where condition and completeness matter more than headline price.
This model is well liked for clean, straightforward analog preamp duty, and it’s a sensible match for a classic integrated-free system or a separate power amp rig. The built-in phono stage and remote-friendly layout add real value, especially if the unit is clean, fully functional, and includes the original remote. At this age, the big upside is getting a respected, easy-to-live-with preamp that still has broad appeal; just make sure switches, volume pot, and phono section are quiet and healthy.
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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