Super clean power when paired with the proper speakers.

Not bridgable.

Recently my surround receiver just died, and I had to have something to power my speakers!! I purchased this from my grandmother (who is also an audio enthusiast, and a head banger!!!! LOL) This is tagged along with an Adcom stereo pre amp. I'm using this back and forth on a pair of JBL CF150's (325 watts max, 98db sensitivity 3-way w/15" woofer 8 ohms) and a pair of JBL E100's (250 watts max, 91db sensitivity 3-way w/ dual 10' woofers 8 ohms). With an optimus 10 band eq hooked into the ext. processor input on the pre amp (bass stays up!)

On the CF150's - At low to medium volume this amp does really good. high end is very crispy! This can really push the bass, but as soon as you hit high volume, when the bass hits, the distort light comes on and you can tell it's distorting! Now with the eq turned off, The volume can go much louder! Once it hits the loud point on these speakers, it truly distorts (not just from bass) It doesn't have enough wattage to get loud enough to pierce your ear drums, but if you don't need it that loud, It's perfectly fine.

On the E100's - Pretty much same as above, but these speakers really show you how clean the power is from the amp. The high end is perfectly clear and realisticly smooth! Midrange is realisticly warm, Bottom end is super deep, not exaggurated. But these speakers clip the amp a little sooner, even with the eq off. But wow, The clarity!!!

I did try it paired with a set of JBL CF100's and a set of JBL E50's - verdict on that--- All the good things from above, minus all the bad things. Perfect for small and medium speakers!

I guess this turned out to be a quadruple review, But you still get the idea of what the amp can do. It sounds beautiful, It's just not made for the flagship model speakers!! If you want extreme volume from this amp, you need highly efficient speakers, or smaller ones, or if you dont need it that loud, I guess go for it no matter what you got!

Build, overall sound

None for under $200.

I bought this for $175 a couple of weeks ago, and it is a total value at that price. Mine has the fixed cord and I bet the sound difference reported by disgruntiled users is purely subjective. Invest in a line conditioner if you want to make a difference in front of an amp.

I have been an audio enthusiast for many years with many systems, and I know good sound. I own Krell, Bryston, various single ended and PP tube amps, and can say that this little Adcom does plenty right and nothing wrong. This amp is in my second system, and I have paired the GFA 5300 with 1970's A/D/S L630 three-way speakers, which are a touch warm of neutral. The bass is full and tight, and has great resolution at it's price. It's shortcomings only become evident in direct comparison to my Krell KST-100 ( which has a more liquid coherent sound and WAY more bass impact at 6 times the price). When played loud, the Adcom gets a little compressed, but again only in comparison to much more expensive amps, and the sound never gets irritating unless it's running hard and the recording is bright. It is a bit cold sounding compared to my Golden Tube SE amp, but those sell for 3 times what I paid for the GFA 5300.

Build quality is high for it's pricepoint. Massive torroid tranny, heatsinks, and discrete components and boards. Mine never gets beyond barely warm, contrary to other's reports of hot operation. Can't do better for the money.

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Krell, Bryston, B&K, various tube amps

Great while it lasted.

Did not last long enough for an Adcom. It should have lasted at least 10 years. What happened to quality without selling your right arm for quality.

I think I had problem from day one but it always fixed it self so I thought it was fine until the end. The left channel died completely a couple of weeks ago. Thinking of whether to fix it but too costly. It powered my B&W 805 great but had to turn it up at least half way to hear a sound. Now it is dead. Looking on ebay for a replacement but they want as much as I paid for the same model and used. My speakers sounded great but now they set and wait for power. sad

Customer Service

They never got back to me

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First Adcom, sony before but would turn on by it self.

Very solid build. Good all around sound throughout the audible range. I listened for hours with no fatigue or thoughts of turning down the volume.

No signal trigger for powering up-but that's being picky. Not the absolute satisfying sound of a world class amp-but tough to beat in it's class.

This is the newer version w/ detachable power cord. I bought this to use while my Accuphase amp was being serviced,figuring I can use it for front L+R in the home theater room when the repairs were complete. After a couple of months of almost daily use I have to say it performed very well and sounds pretty good. Not quite as rich and full as the Accuphase but that's hardly a fair comparision. There was no harshness or brittle-sounding charachteristics at any volume and it ran only slightly warm after hours of use. My Meadowlark speakers can be very revealing but there was no unpleasant sounds from this amp. I have no regrets in buying it.

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In this price range: Marantz mono blocks,Denon ss amp, Acurus

Excellent performance for the price. Five year warranty

Not made in the USA

Maybe I am not a critical enough listener, but I don't understand where the negative reviews of this amp are coming from. I bought this demo unit from Wild West Electronics (because it is being discontinued) and it does a superb job of driving my Paradigm 9 speakers. I don't here any of the "veilness" or "harshness" that other people write about. It plays all kinds of music very well by presenting an excellent 3-D soundstage and producing a neutral sound.

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Adcom 535-II amp,

Great value for the money, especially used. Good amp for a specific purpose.

Runs Hots, needs cooling. The ADCOM Thump.

I bought the GFA-5300 to supplement my surround speakers for my Onkyo Surround sound receiver. For that purpose it has done a good job running a set of Bose 501s. The amp runs hot as previously indicated by other reviewers. A set of DC fans helped that problem somewhat. The GFA 5300 was a good value to meet a need, but not an amp to cornerstone your system off of. The on-off thump is a regular ADCOM feature and you can get used to it in time (based on my 1990 GFA-555).

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Onkyo TX SV717 PRO Adcom GFA 555

Excellent frequency response. Runs relatively cool. Soundstage is GREATLY improved over the Pioneer tuner this replaced.

The power-on "click" or "pop" noted for this model is present in mine as well, but it's relatively faint and doesn't really bother me.

I purchased my Adcom GFA-5300 (non-detachable power cord version) after acquiring a set of KEF Cresta 3 speakers. These were plugged into an old Pioneer home-theatre amp which I suspected was holding them back. What a huge difference! The first thing I did after hooking up the unit was listen to a recording I had made of a concert with voice and piano. All the characteristics I assosiate with the adjective "live" - soundstage, accurate tonal response throughout the speakers's rated range - were greatly enhanced. At less than $200, this unit was a steal. I can recommend it without hesitation for anyone who is taking the next step up from a receiver or integrated amp.

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Onkyo, Pioneer, JBL

Price, Availabilty.

Clarity, pace/rhythm, imaging, soundstaging, top-end, midrange, bass, everything is lacking.

I originally bought my Adcom GFA-5300 ($500 Canadian funds) 2 years ago as a temporary band-aid until I found “THE” amp for my system. Now that I have found it – the Musical Fidelity A3.2CR, I can’t afford it. However I will find a way very soon, I’ll tell you why. Recently I decided to lend my brother-in-law my spare system: Rotel 970, B&W 601’s and an old (1983) Sansui A-80 integrated amplifier I picked up used for $25. Before setting it up for him I thought I would make sure everything still worked. I couldn’t believe what happened next, it sounded better than my main system: Rotel 971, Linn Kolektor Pre-Amp, Adcom GFA-5300, and Revel Performa M20 speakers. I sat there dumbfounded until I realized that the weak link in my main system must be the 5300, so I hooked up the Rotel 970 and the Sansui to my Revel M20s and it blew me away. The limitations of the Sansui also became very evident, however, it was incredibly more musical and revealing than the Adcom 5300 and showed how horrible the Adcom really is. The 5300 sounds harsh, veiled, slow, generally unpleasant etc. and the imaging/soudstaging is almost nonexistent . I’ll be tying to sell it ASAP. Funny though, I also have an Adcom GFP-750 Pre-Amp that is a true high-end product, it comes very close to the Linn Kolektor and it was designed by Nelson Pass of Pass Labs so no wonder. Adcom might want to commission Nelson to design a few amps for them as well. I can't believe I put up with it for so long. Whatever you do, don’t buy an Adcom GFA-5300!

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Many better amplifiers

very over priced ! Not any better than Sony,Onkyo,jvc etc.....

So So sound--nothing to rave about ! Had no problems with it thankfully.Finally got rid of it(gave it away)since I was able to buy something much better in the same price range

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NAD,Luxman,Onkyo

This is maybe one of the few Adcom products that works to some extent,however,the one drawback is that loud THUMP it produces thru your speakers when you turn it on.Not a good thing in any manner ! I had to go by a speaker selector right after I recieved the unit that had an on/off switch so I could turn the amp on then wait 15 seconds and turn the speakers on to prevent that THUMP ! No other name brand amps do this that I''m aware of.Along with the horrible sounding preamp that had a tuner that never worked,I finally gave this junk away to make a long story short.Adcom got a little over $1000 dollars from me and it will never happen again.I have other quality products since and they were a bit lower priced and sound so much better.How this company continues to produce problematic terrible sounding equipment remain on stereo shop shelves is beyond my comprehension !