Adcom GFA-555se, a Classic Power Amp Revisited

Adcom made its name in 1979 with the introduction of the GFA-1 power amplifier.  The GFA-1 used what Adcom called a "high current" design with substantial power, at a reasonable price.  The amp was a hit, and a company was born.  

Fun Trivia: I you can guess what "GFA" stood for, email us and we will send you some Holt Hill Audio swag.

We are offering a generational successor to the original GFA-1, the GFA-555se power amplifier.  The original 555 was a Stereophile magazine "Best Buy" inn 1985, designed by the venerable Nelson Pass. The has held its own against many, many other  more exotic amplifiers over the last 40 years, and has been tweaked and upgraded ever so carefully by Adcom's own internal design team.  Adcom shocked the industry back then by providing amplification that was uncolored, crisp, with boisterous and controlled bass - All in affordable and well-assembled packages.  Rated conservatively at 200 watts per channel into 8 ohm, and 325 watts per channel in to 4 ohm, the 555 can accommodate demanding speaker loads and do so without losing whimsy or charm.  

The 555se was released in 2010 and carries on the success of the original design, but with some modernized upgrades.  The drive boards have been upgraded with higher quality components, nary a hint of the faulty capacitors that plagued the 555 redesigns of the 1990s.  Power supply components were significantly improved, providing a quieter backdrop for the rest of the amp... Lowering total harmonic distortion and improving signal-to-noise ratios (120dB) by over 15% from previous versions.  The 555se also features more robust speaker and heat protection circuitry, and the ability to switch between balanced and unbalanced inputs. 

If you are an Adcom fan, or if you just want an affordable amp with no-nonsense performance, modernized internals, and a design that is rooted in audio legend...this is the one for you.

Demos are encouraged in Andover, MA.

$779 (plus applicable shipping and sales tax)