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Adcom GFA-545

Stereo Power Amplifier

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Adcom GFA-545

Specifications

Power output: 100 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 20kHz

Total harmonic distortion: 0.04%

Damping factor: 400

Gain: 27 dB

Input sensitivity: 1.25V

Signal to noise ratio: 110dB

Semiconductors: 38 x transistors, 2 x zener diodes, 12 x diodes, 2 x IC, 2 x diode bridges

Dimensions: 138 x 432 x 310mm

Weight: 11kg

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Reviews

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rating
Reviewed Aug 13th, 2018 by vitorzoom

Low cost amplifier and very detailed and deep sound. Very silent background. Very musical putting the instruments on a sound stage articulated and deep.

rating
Reviewed Jul 27th, 2018 by karlson

Good in both aspects in Engineering and Sound. Great Sound!

rating
Reviewed Nov 03rd, 2016 by bestcoast127

For scope...
I gave the brand new (as of 10/16) Marantz SR-5011 a 5.
I gave the Onkyo TX-DS939 (1999 model) a 6.5 and this ADCOM an 8. Yes the Onkyo spanked the brand new Marantz in an A/B test with 5 people testing.

OK so my ADCOM hasn't been serviced once BUT it has been babied its whole life. As in volume at 15% or less it's whole life. I would give it a 7.5 rating if I could but I can't so I give it an 8 for giving me so many years of excellent listening enjoyment. In my book a 10 is unachievable and a 9 is a TOTL Krell or the like.
THE most important part of owning ANY audio set is matching components. For most amps in the price range of a used ADCOM this is a very tough thing. For the ADCOM it's a walk in the park. I have paired it with many speakers and it can push the hardest or get the minute detail out of sensitive speakers. My favorite speakers to pair with this are older B&W 600 series. For some reason they play slightly better than similar quality speakers like KEF C series. Now, obviously, you can get better sound with $3K speakers but why would you pair it with a $200 amp? I got a couple used B&W 603 S2 speakers for $200 and the ADCOM for $150. It sounds better than everything in Best Buy Magnolia except for the Martin Logan Motion 60XLs coupled with the TOTL Marantz receiver SR-7011. That costs $4500 out the door. And the ADCOM 545 / B&W 603 sounds 85% as good for 5% of the price.

If you are looking for a cheap combo or just getting into being an audiophile check your Craigslist for ADCOMS and older B&W 600 series.

Side note: I have this running with a decent B&W ASW-1000 sub and the new Yamaha WXC-50 preamp. Sub is just ok but can def be improved. I'd like to try an SVS SB-1000 one day soon. The Yamaha is an amazing preamp you can run from a beautiful app on your phone. Has a great GUI, DAC, internet music streaming, USB (with FLAC), etc. Reason I added this was because the factor that affects the ADCOMs the most is the source. Awesome source = awesome music.

 

Comments

re: GFA-545

how do you think the adcom gfa-545II would power a pair of ar tsw910s have them hooked to a mint sansui 5000x sounds great but these ars need some more power. your thought would appreciated

re: GFA-545

Hello! I have a pair of KEF c35s. I am trying to figure out which amp to get and this is one of my strongest options. I have a question. If I want to play my Ipod or computer will I need a pre amp or would connecting them straight to the 545 work?
What benefits would I get from a preamp?

Thank you very much!

re: GFA-545

It would require a preamp.

re: GFA-545

Hello! I have a pair of KEF c35s. I am trying to figure out which amp to get and this is one of my strongest options. I have a question. If I want to play my Ipod or computer will I need a pre amp or would connecting them straight to the 545 work?
What benefits would I get from a preamp?

Thank you very much!

djjamthis's picture

Adcom GFA-545

Thank You Hi Fi Eng. for saving the system!!!! I don't Have The word's To Thank you For Your Info The Kids That Now Can count on keeping there system going it's not e z when you don't have much to work with they are a people of low income I myself donate my time at no cost just to see smiling faces on these kids that will have a little more opportunity of living learning for a better tomorrow

from there Heart to you Grasias Jaime Canizalez djjamthis

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