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Adcom GFA 555

alaAverage 4.7

6 reviews

Oct, 2015

alaTest has collected and analyzed 6 reviews of Adcom GFA 555. The average rating for this product is 4.7/5, compared to an average rating of 4.1/5 for other Receivers & Amplifiers for all reviews.

On average, users rate this product 93/100.

Review analysis

(Based on 6 reviews)

User Reviews  

Showing 1 - 6 of 6 Show Reviews: in English

Consumer review by: jim (

Adcom GFA-555MKII Amplifiers


Wow, is all i have to say!

Feb, 2015

Consumer review by: Josh (

Adcom GFA-555MKII Amplifiers


I purchased this roughly a year ago after reading favorable reviews. Needed adequate power to run magnepan MMGs. This was big improvement over the Denon AVR891 I was using. Claims 135 watts per channel but I'd bet it's around 70 real watts. I started...

Nov, 2014

Consumer review by: (

Adcom GFA555 Amplifier


good amp its worth every penny

Nov, 2011

Consumer review by: eherdian (

Adcom GFA-555MKII Amplifiers


I've been using this adcom for 5-6 years, I bought it used for USD $ 350

Aug, 2011

Consumer review by: ces4x4 (

Adcom GFA-555MKII Amplifiers


Want to make this amp really sing, replace the driver stage caps with Nichicon Muse Fine Gold caps. I had my service tech do it for a mere $175. Let the amp then burn in for at least 50 hours sit back and be in awe!! Individual instrument placement and...

Jun, 2011

Consumer review by: couldbee (

Adcom GFA-555MKII Amplifiers


What a gem! This thing has more power than a demented dictator. I purchased this unit today on Craigs List for $250 in mint condition! I jumped on it based on the reviews that I read here on Audio Review and Stereophile. It just churns out the music...

Nov, 2009

Product Specifications

General Features

Loudspeakers: No


Dolby / DTS: No

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