Adcom GFA-5300 Amplifiers

3.7/5 (30 Reviews) MSRP : $450.00


Product Description

Number of channels: 2, Watts per channel into 8 ohms:80, Watts per channel into 4 ohms:125


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Reviews 1 - 5 (30 Reviews Total) | Next 15

User Reviews

Overall Rating:5
Value Rating:5
Submitted by TomH a AudioPhile

Date Reviewed: March 12, 2017

Bottom Line:   
I own an array of systems and amplifiers including Conrad Johnson, Sonic Frontiers, Adcom and Parasound.

The Adcom GFA 5802 and it's smaller brother the GFA 5300 are excellent sounding amplifiers based on a 3 gain stage design leveraging International Rectifier HexFets. The design by Nelson Pass produces a very good soundstage with strong inner detail and a smooth high end compared to many bi-polar output designs. If any amp is old and poorly ventilated, the caps in the gain stages can skew off spec and cause a degradation in the sound quality.

All older amps should have all push on connectors cleaned with ProGold and the bias and AC balance set prior to critical listening. If these Adcom amps are in spec, they will compete favorably with many amps currently on the market.

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Used product for:   More than 1 year

Duration Product Used:   AudioPhile

Product model year:   1998



Overall Rating:5
Value Rating:5
Submitted by greg degelman a Audio Enthusiast

Date Reviewed: January 17, 2013

Bottom Line:   
Adcom GFA-5300 Power Amp, I have been a audio fanatic for longer then i want to remember, All as i can stay ,Any body staying that the Adcom GFA-5300 Power amp doesn,t sound good, Has a piss pure sounding preamp hooked up to it, To make a long story short, As i found out with the one i have,I had a Nikko Betta 30 Preamp hooked up to it at first ,The low end was like it wasn,t there, Then i got a hold of a Kenwood Basic C-2.Preamp, I could not belive the differance in how the system sounded, It blew me away, How much more the music was define with the kenwood preamp,

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Used product for:   More than 1 year

Duration Product Used:   Audio Enthusiast

Product model year:   Pre 1995



Overall Rating:5
Value Rating:5
Submitted by t-bones a AudioPhile

Date Reviewed: August 10, 2011

Bottom Line:   
Now that prices have come down on the older Adcoms I decided to upgrade to all power amps for my home theater. I have a friend who designs equipment and I asked him if he could do a custom modification to my 5300 to be bridgable. He did and while he was at it he tested the RMS power output with both channels driven. That little 5300 puts out 120W x2@8ohm, 175 x2@4ohms and 350w x1@ 8ohms! Those are RMS outputs, not peak. Adcom seems to under rate their amplifiers.

In a direct comparison to the older GFA555 the newer MOSFET amps seem to have better control on the lows and are a little more laid back highs. I tested both my GFA5500, 5300, and 555. All sound great however I am still amazed at the clean power the little 5300 puts out.

I conducted the comparisons using WAV files on my laptop and a set of Energy 6 1/2 inch 2way connoisseur speakers.

Yes there are better sounding amps out there, but at 5 times the cost. With the prices of the 5300 under $200 on ebay, these amps are an under rated deal.

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Used product for:   1 to 3 months

Duration Product Used:   AudioPhile

Product model year:   1997



Overall Rating:4
Value Rating:5
Submitted by Ny240JBL a Audio Enthusiast

Date Reviewed: February 25, 2008

Bottom Line:   
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!

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Used product for:   1 to 3 months

Duration Product Used:   Audio Enthusiast

Price Paid:    $200.00

Purchased At:   From Family member



Overall Rating:4
Value Rating:5
Submitted by mywifespissed a AudioPhile

Date Reviewed: December 28, 2007

Bottom Line:   
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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Used product for:   Less than 1 month

Duration Product Used:   AudioPhile

Product model year:   2000

Price Paid:    $175.00

Purchased At:   Local CL site




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