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Adcom GFA-555 ii Stereo Power Amplifier - $550 (Saxonburg)
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The Adcom GFA-555 II is a legendary, powerful, high-fidelity 2-channel solid-state stereo power amplifier from the 1990s, known for its robust build (Triple Darlington output), high current delivery (200W/ch into 8Ω, bridgeable to 600W), and dynamic, authoritative sound, making it excellent for driving demanding speakers and genres like rock.
Key Features & Specs:
Power: 200 watts per channel (8Ω), 325 watts (4Ω, with fan), 600 watts (bridged 8Ω, with fan).
Design: Triple Darlington output stage, heavy transformer, large heatsinks, thermal/high-current protection.
Sound: Known for "grunt, horsepower, and torque," excellent for rock, aggressive music; delivers powerful bass and detailed soundstage.
Inputs: Gold-plated RCA jacks, 100kΩ impedance.
Outputs: Stereo binding posts (banana plug compatible).
Build: Heavy (around 35-40 lbs), made in the USA, often black finish.
What Makes It Special:
High Current: Can drive difficult-to-drive speakers with authority.
Performance Upgrade: The "II" version improved upon the original with better components, clearer sound, and enhanced thermal management.
Value: A respected classic often available used for reasonable prices, providing high-end performance for less.
Considerations (Vintage Unit):
Power Draw: Can dim lights on startup due to high current draw; needs good ventilation/fan for demanding use.
In essence, the Adcom GFA-555 II is a powerful, well-regarded vintage amplifier offering incredible value and performance for serious listeners, especially those with demanding speakers or a preference for dynamic, powerful sound.
This unit is available for demonstration at my location in Saxonburg anytime you like.
I am downsizing a very large collection, so please feel free to inquire about other components, I have tons!
I have:
Turntables.
Speaker sets.
Receivers.
Amplifiers.
Cassette Decks.
8 Track Decks.
Reel to Reel decks.
A/V Tables.
8 Track Tapes.
Reel to reel tapes.
Blanks as well as pre-recorded.
Kenwood JVC Pioneer Akai Teac Marantz Cerwin Vega Sansui KLH Hitachi M&K Polk Technics Nakamichi Panasonic Sony Realistic Speaker Mcintosh Klipsch JBLl Luxman Advent B&W Bose Audiophile Stereo Amplifier Turntable Tape Deck Reel To Reel