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ADCOM GFA-555se Power Amplifier

ADCOM GFA-555se Audio Power Amplifier
The classic award winning amplifier design of the original GFA-555mkII has been reborn. The Adcom GFA-555 represents the most advanced thinking in audio amplifier design. It offers exceptional value and superior performance at a reasonable price. Being innovative is what keeps us going strong and achieving great things. Whether it's our iconic high current amplifiers or our cutting-edge digital processors, ADCOM components never fail to impress even the toughest crowds. As we keep pushing for better quality and performance, our components have scooped up more than 25 Product of the Year and Special Recognition awards from Audio Video International. On top of that, we've snagged 3 Diapason D’Or Awards, 7 Consumer Electronics Show Design and Engineering Awards, and we've been featured on Stereophile’s “Recommended Components” list 70+ times since 1988!


ADCOM GFA-555se Audio Power Amplifier


GFA-555se power amplifier represents the pinnacle of ADCOM’s audio engineering. This Nelson Pass design broke ground when it came out in the 80’s, getting rave reviews and providing tank-like reliability at a decent price. That these audio power amplifiers are still much in demand after so much time is a strong testament to their value and durability.

Better Sound Delivery

We have worked long and hard to ensure that the GFA-555se power amplifier improves upon its original eminent version in key areas, delivering even better performance. Externally, the chassis footprint and front panel design are identical to the original. Internally, all circuitry has been upgraded to meet ETL/ETLc, FCC, LVD and CE/EMC requirements using UL approved FR-4 printed circuit boards. High performance component selections include ultra low ESR electrolytic capacitors. The result of these improvements is lower distortion, better dynamic range, improved damping factor and greater stability and separation of individual instruments on the sound stage.


Key Features of the ADCOM GFA-555se Audio Power Amplifier

spec gfa555se - Adcom

Output Power

200 watts per channel, 8 ohms
300 watts per channel, 4 ohms
600 watts, 8 ohms BRIDGED

Frequency Resp.

@ 1watt, 8-ohms:
10Hz to 20kHz +0, -0.25dB

Power Bandwidth (-3dB):

1.7Hz to 100kHz

Input Impedance

100k ohms unbalanced
10k ohms balanced


120VAC & 230VAC / 50-60Hz

Max Dimensions

7-1/2” x 12-1/2” x 17”
191mm X 318mm X 432mm


36lbs (16.3kg)
Shipping weight:39lbs (18kg)

Input Sensitivity

1.75V rms, 200W into 8 ohms.
130mV rms, 1 W into 8 ohms.

Damping Factor

≥ 900, 20Hz to 20kHz.

Note: For more technical specs, please refer to the attached user manual & Spec

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100$ Off
on your first order!

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