Adcom GFA-565se monoblock power amplifiers briefly used for several weeks in a commercial recording studio location. Replacement is due to changing to different speakers. Pricing is per unit, two are currently available The GFA-565se high power amplifier is capable of effortlessly driving a wide variety of loudspeakers, even those with exceptionally low impedances. It excels in maintaining high-power output consistently, even when faced with reactive impedances. Meticulous attention was given to ensure that the amplifier’s distortion remains minimal, especially when dealing with these complex loads, where the phase differences between voltage and current are significant.The GFA-565se incorporates an impressively robust power supply, featuring a generously sized transformer that powers a reservoir of 72,000uF filter capacitance. This setup ensures a substantial reserve of power capability. The transformer itself was purposefully engineered to provide exceptional regulation, guaranteeing unwavering voltages regardless of the amplifier’s power requirements.Notably, the GFA-565 possesses the ability to amplify DC signals and is unrestricted in its capacity to deliver energy across low-frequency and peak-bass ranges. Its gold-plated brass RCA input jacks with Teflon insulators exemplify the amplifier’s commitment to high quality.Additionally, the high power audio amplifier features a front-panel LED indicator alerts users to thermal overload conditions, enhancing the amplifier’s safety features. - Adcom

This is a reprint of the StereoPhile Review done in 1990. It has 7 pages of information, tests, graphs and pictures. The GFA-565 MONO Amp and the GFP-565 Preamp, some of Adcoms best equipment EVER! Here you have the THOROUGH folks at Stereophile taking both through its paces with a full test of each and comments about both. You will be amazed at what they get the amplifier to put out under test conditions! The picture is exactly what you will receive, 7 pages of RARE information. You will love it if you have this AMplifier or Preamp! -This is a an exact re-print of a classic Audio Advertisement. -Each page is 8.5 by 11 -Shipping is $3 in the USA and $6 ANYWHERE else, I ship WORLDWIDE! Each additional item is only $1 more to ship! -As always, your satisfaction is GUARANTEED at Electronics Archives! If you are unhappy with any purchase, email and I will get you a resolution or a refund! -Email me with any questions, I put 10-20 new Ads and Brochures on my site EVERY DAY! THANK YOU! Powered by eBay Turbo Lister The free listing tool. List your items fast and easy and manage your active items.

ADCOM GFA-565 Mono block (Power House Amplifiers) (Famous) (matched pair) Beautiful, Better Than New Inside THE AUDIO PRIZE AWAITS YOU Here is another fine offering from the audio labs of Morris Electronic Repair Boutique This pair of ADCOM GFA-565 Monoblock’s are in beautiful condition, which have been completely refurbished. These are a very rare classic. At 350 Watts / 8 These baby’s will not only light up your Wilson Audio Sophia Series 3, but will power any speaker in the world! At 450 Watts /4 or 850 Watts / 2 continuous, it will handle the most demanding loads. The clarity, musical definition and sound stage will literally speaking “ blow you away”!! You are not going to find many of these around, for the lucky people that own them keep them! The design and power is second to none. These are very HIGH CURRENT amplifiers, with a combined rail capacitance of 70.000 uf per unit, which gives lots of head room. These 565s have a time delay circuitry (soft start) to apply the bias voltage after all the amplification circuits are up to speed, eliminating the speaker thump on power up, and also to protect your speakers incase of circuit issues. I personally would put these 565s up against any of the big boys like Krell - McIntosh - Jeff Rowland - Classe Audio, PS Audio etc. It will hold it’s own, if not easily surpass. These two amplifiers are the pinnacle of audiophile euphoria. If you would like to save on these contact me using the blue letter on the last picture Both of these amplifiers are EXACTLY! The same! Except for serial numbers BUT WAIT THERE’S MORE SOMETHING NEW: There is a BIG DIFFERENCE with this pair of 565s, from the originals. The driver PCB’s are brand new double layered boards. ALL the components on the driver PCB’s are brand new, 1% audio grade components from US mfg. Vishay, kemet etc. (very expensive) The driver heat sinks are enlarged from original to dissipate the heat more effectively. Everything on the PCB’s have been upgraded to the highest audio grade component’s to give the best low noise sound reproduction possible. Plus expect to get a minimum of 30 years service from these refurbished amplifiers, before any degradation of components. I am a one man shop, with 30 years as a electronic tech, so each piece of high quality audio equipment gets my personal attention, of which I repair, clean, adjust, and inspect everything as if I were keeping for my own. I have personally been completely through the internals of these GFA-565s (as you can see by the pictures) insuring everything is to factory specs. I have many exhausting man hours in the refurbishing of these amplifiers and with populating the new driver PCB’s with all brand new components. Because these were so special, I gave them extra care. I leave no stone unturned. So you can buy with confidence knowing you are going to receive two very high quality amplifier’s in perfect condition electronically and beautiful condition cosmetically.. These unit’s have undergone hours of testing and burn in under load, driven by a Harman Kardon CD 491 player into a Harmon Kardon 825 preamp into Paradigm B/P Espirit 300 w Towers. The externals are in better than new condition. The driver boards are new with all new audio grade 1% tolerant components. The bias voltage was adjusted to 23.5 mV per unit.The two electrolytic are new on the output modules and have been upgraded to 100 uF/160 vAll the caps on the soft start board are new. The rail capacitors of 35,000 uF have checked out to be 44,500 uF & 42,800 uF on amp 1The rail capacitors of 35,000 uF have checked out to be 43.000 uF & 43,400 uF on amp 2The rail capacitors allowed leakage of 9,000 uA checked to be 720 uA & 530 uA amp 1The rail capacitors allowed leakage of 9,000 uA checked to be 540 uA & 480 uA amp 2All electrical connections have been cleaned & deoxidized with Deoxit - D5 cleaner® The S/N # of each unit is 019215705 & 019215715 (Notice ser# only 10 numbers apart) THD is .002% which is incredibly low! Plus at any frequency it is less than .02%The DC offset voltage at the speaker terminals is .2mV on amp 1 & .4 mV on amp 2These units draw .8 amp’s at 116vac per unit at idle. Please Note: I only ship in the US. No international shipping! As always I pack everything with the best of materials, so as to thwart the gorilla UPS handlers. It will arrive alive and unscathed. The service manual & owner manual will be included (reproduced from original) along with amplifier spec sheets on each amp after testing. And will carry a one year iron clad warranty against all parts & labor and I will pay the shipping both ways in the unlikely event an issue should occur. Thank you, for reading all the verbiage, for these are the (cream of the crop)!! Fantastic Powerhouse Amplifier’s in very Beautiful condition. Any issues you should have I take care of them, Pronto, Period! “ No If’s, And’s or But’s”. This is why I maintain a 100% positive feedback. I answer all submitted questions.