Download the adcom gfa555 manuals for free hifi manuals. Below you will found our manuals on the adcom gfa 555. The biggest collection of adcom manuals and schematics. The gfa 555 was designed by the legendary nelson pass interview, chat room, whose amplifiers today sell new for five figure price tags. The original adcom gfa 555 stereo power amplifier hit the market in 1985. Its retains the power output of the original gfa555 and reduces distortion when driving difficult loudspeaker loads. The adcom gfa 555 represents the most advanced thinking in audio amplifier design. The adcom gfa555 ii is among the worlds greatest audio power amplifiers of all time. The service manual functions as a repair guide for troubleshooting and sometimes contains tips for refurbishing and modifications. By use of updated components in the classic adcom gfa555 design, we have reestablished our heritage of high performance and audiophile quality at the greatest possible value. At 200 watts per channel, it offers exceptional value with serious hifi sound. Adcom multichannel highcurrent power amplifiers owner s manual gfa 7605, gfa 7607. The amplifiers output clipped at 242 watts into 8 ohms, 352 watts into 4 ohms, and 465 watts into 2 ohms. Service manuals, schematics, eproms for electrical technicians.
The gfa555 ii was designed from the ground up, except for the heat sinks and chassis, by walt morrey. Adcom gfa555ii power amplifier service manual pdf download. Enough time for most rock bands to burn out, fade away and then stage a comeback. The gfa 555 ii was designed from the ground up, except for the heat sinks and chassis, by walt morrey. This site helps you to save the earth from electronic waste. I have used an adcom gfa 545 and gfa 555 and both are great amplifiers. Some of the outstanding features of this product are.
Have countless speakers been destroyed by adcom amps. Adcom gfa 555 ii power amp service manual original. Adcom manuals, schematics and brochures hifi manuals. You have made a wise choice that will reward you for years to come with exceptionally accurate and. To realize the full potential of your new amplifier, and before making any connections. The gfa555 has a little difference in sound than the newer adcom amps like the updated model the gfa5500. Page 1 page 2 safety information page 3 page 4 unpacking page 5 connection page 6 rightleft stereo speaker outputs page 7 page 8 stereobridged mono inputoutput page 9 dc rail fuses page 10 ac line cord page 11 ac onoff switch page 12 instantaneous distortion alert leds. Our standard onehour preconditioning at onethird rated power left the top of the adcom gfa555 very hot to the touch. For use in professional installations, the gfa 555ms may be mounted in a standard 19inch rack using the optional rm7 rackmount adaptors available through adcom dealers. Congratulations on your decision to purchase the gfa555se power amplifier. This robust amplifier is capable of operating into very low impedance or difficult speaker loads due in part to its high current design.
Adcom gfa 545 ii amplifier owners manual photo copy. The gfa 555 remained in the adcom line until recently, when the company upgraded it to the gfa 555ii, which is almost identical to the original but has several new construction and circuit features designed to enhance its performance to reduce the amplifier s already low distortion even further, the grounding system for its inputs has been changed to isolate them from the grounded sides of. Gfa 585s are excellent power amplifiers, but over the years your amp may need a service or repair. Adcom manuals hifi engine owners and service manuals. The adcom gfa 555 ii is among the world s greatest audio power amplifiers of all time.
Considering that you can get a used gfa 555 ii like this one for about. At 200 watts per channel, the gfa 555 offers an exceptional value. User manuals, guides and specifications for your adcom gfa535l amplifier. The gfa555 was designed by the legendary nelson pass interview, chat room, whose amplifiers today sell new for five figure price tags. Enough time for the rolling stones to release 11 new records 28 for neil young. Adcom gfa 585 repair service the repair service covers any repair of the adcom gfa 585 power amplifier. Adcom diagrams, schematics and service manuals download for free. The original adcom gfa555 stereo power amplifier hit the market in 1985. The gfa555 remained in the adcom line until recently, when the company upgraded it to the gfa555ii, which is almost identical to the original but has several new construction and circuit features designed to enhance its performance to reduce the amplifiers already low distortion even further, the grounding system for its inputs has been changed to isolate them from the grounded sides of.
Download owner s manual of adcom gfa 6000 amplifier for free or view it online on. Adcom amplifier speaker protection audiogon discussion forum. The gfa 555 has a little difference in sound than the newer adcom amps like the updated model the gfa 5500. Visit us online for more information or to download service manuals today. Get the best deals on adcom vintage electronics manuals when you shop the largest online selection at. This repair manual is intended to assist qualified technical personnel in verifying performance, adjusting, and repairing the adcom model gfa 555 power tv multimediaamplifier. Adcom gfa545 ii amplifier owners manual photo copy. Adcom service manuals, owners manuals and schematics on. By use of updated components in the classic adcom gfa 555 design, we have reestablished our heritage of high performance and audiophile quality at the greatest possible value. I am reluctant to call any given transistor power amplifier a best buy or breakthrough. The adcom gfa555 pro and the 565 balanced option used opamps for balanced operation and they did not sound as good as the unbalanced input.
Also, if this amp is a really a hopped up mk ii, then it will have a dc servo and capacitor input. Bridged mono hookup the adcom gfa 555 can be used as an extremely powerful monaural amplifier without the use of any additional accessories or modifications. The gfa 5500 seems to be a little brighter like, the highs and midranges are kind of screaming at you. Also, if this amp is a really a hopped up mk ii, then it will have a dc servo and capacitor input instead of a directly coupled signal path like the original. The owners manual is used as an reference guide, instruction manual and instruction book. Adcom gfp555 service manual download, schematics, eeprom. From my talks with designers and other audiophiles, it is clear that the state of the art in power amplifiers is about to change.
How to i set up an adcom gfa555 to work in bridged mode. The procedures described here are not intended for consumers or persons not familiar with the appropriate safety procedures. I want to rework the jbl 4408a s because i think they are a little tinny on the top end, but from what ive read from jim is that it s not the tweeters but crossover components. Adcom amplifiers have fuses on those rails some with them in holders on the back panel which will probably blow. You have made a wise choice that will reward you for years to come with exceptionally accurate and musical sound reproduction.
I have the older adcom gfa 555 amp and just set it up bridged to run my sub 18 jbl 4641. At 200 watts per channel, the gfa555 offers an exceptional value. You will receive a huge set of various service manuals, owner manuals, schematics andor parts list on dvd s. It is so clearly superior to past amplifiers in the low to midpriced rangenot to mention most.
Considering that you can get a used gfa555 ii like this one for about. View and download adcom gfa555 owners manual online. The amplifier s output clipped at 242 watts into 8 ohms, 352 watts into 4 ohms, and 465 watts into 2 ohms. Adcom gfa 555 design, we have reestablished our heritage of high performance and audiophile quality at the greatest possible value. The service manual functions as a repair guide for troubleshooting and. If the gfa 555ms is to be mounted on a rack, along with other components which are interconnected to the gfa 555ms, the amplifiers chassis must be insulated from the. Adcom ac515 owners manual english pdfadcom ac615 owners manual english pdfadcom ace315. Download owners manual of adcom gfa6000 amplifier for free or view it online on. I currently use a gfa 555 with a pair of jbl 4408a s and it s loud and clear. The adcom gfa 555mkii is a completely upgraded version of the famous gfa555 projected by nelson pass. All books are in clear copy here, and all files are secure so dont worry about it. While returns do accepted it is a loss of time and money for buyer seller as well. The adcom gfa555 represents the most advanced thinking in audio amplifier design.
Gfa585s are excellent power amplifiers, but over the years your amp may need a service or repair. For a list of authorised retailers please contact the company. Below you will found our manuals on the adcom gfa555. Enough time for a digital music revolution maybe peaking now. Your adcom gfa 555 represents the most advanced thinking in audio tv multimediaamplifier design. You will receive a huge set of various service manuals, owner manuals, schematics andor parts list on dvds. The adcom gfa 555 pro and the 565 balanced option used opamps for balanced operation and they did not sound as good as the unbalanced input. Adcom gfa585 repair service the repair service covers any repair of the adcom gfa585 power amplifier. Congratulations on your decision to purchase the gfa 555se power amplifier.
Original owners manual for vintage adcom ace 515 ac enhancer. Adcom gfa555 manual stereo power amplifier hifi engine. This website is not affiliated with or sponsored by adcom. This repair manual is intended to assist qualified technical personnel in verifying performance, adjusting, and repairing the adcom model gfa555 power tv multimediaamplifier. Database contains 1 adcom gfa535l manuals available for free online viewing or downloading in pdf. View and download adcom gfp555ii owners manual online. Ive owned enough adcom to know they can do things they arent rated for but id never suggest something other than paperwork. Apr 28, 2012 using adcom gfa 555 ii power amplifier service manual, you will be able to get answer of common questions regarding equipment like. The gfa5500 seems to be a little brighter like, the highs and midranges are kind of. Why would the service manual state something other than the owners manual. From where i stand, the adcom gfa555 is the first sample of this new wave. Your adcom gfa555 represents the most advanced thinking in audio tv multimediaamplifier design.