ADCOM GFA-7700 Multi-Channel Amplifier

dorokusai
dorokusai Posts: 25,577
edited June 2008 in For Sale (FS) Classifieds
Adcom GFA-7700 Multi-Channel Amplifier - Black - 9/10 - *SOLD* to Neskahi

This piece was part of a 7.1, 14 amplifier, bi-amplified system that is being decommisioned and rebuilt. It's minty fresh, the interior is spotless and 100% operational. It was bought in 2004 and was treated like a new girlfriend, without the romantic drama.

It's a modular design which is very smart in my eyes, for any multi-channel amplifier. This is a beast with a huge toroid power supply, individual capacitance for each channel and it's rock solid, 4ohm stable. The 4ohm power ratings are not given in the user manual but its clearly stated, that it can run 4-2ohm loads.

175wpc@8ohm

• Precision-matched devices used throughout the signal path.
• 120,000 μF of power supply-filter capacitance for greater reserve capacity.
• Independent power supplies for each channel.• Fewer gain stages improve signal reproduction accuracy.
• Custom toroidal power transformer provides better regulation and greater peak current capability.
• Independent thermal-overload and distortion LEDs for all 5 channels.
• High quality, gold-plated 5-way binding posts.
• High quality, gold-plated RCA jacks.
• Large independent, internal heatsinks for greater cooling capability of output devices.• Convenient 12 VDC power ON/OFF triggering.
• Heavy gauge, anodized aluminum front panel.
• Powder-coated, baked chassis and top cover for greater durability.
• Cooling vents for greater efficiency and cooler operation while driving low impedance loads.
• Standard DB-25 connector to simplify installation

Adcom GFA-7700 Review - 2003

The amp has been spit shined, treated with CAIG products and is packed to withstand a nuclear blast.

Includes: User Manual.

S5280077AFGA
CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • haimoc
    haimoc Posts: 1,031
    edited April 2008
    bump..
    -?¿-
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  • soiset
    soiset Posts: 724
    edited April 2008
    mmmm, sounds yum...
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  • dorokusai
    dorokusai Posts: 25,577
    edited April 2008
    Thanks guys. I'll include shipping and a can of Redi-Whip if that teases you into a conversation.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • George Grand
    George Grand Posts: 12,258
    edited April 2008
    Where do you GET this stuff? (the amps and stuff, not Redi-Whip)
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  • dorokusai
    dorokusai Posts: 25,577
    edited April 2008
    Panhandlers, prostitutes and various other denizens of the urban underworld.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • maximillian
    maximillian Posts: 2,144
    edited April 2008
    dorokusai wrote: »
    Panhandlers, prostitutes and various other denizens of the urban underworld.

    Wow, never knew panhandlers and prostitutes were so meticulous about caring for their equipment. Most of your equipment is mint or near mint.
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  • dorokusai
    dorokusai Posts: 25,577
    edited April 2008
    They don't have very good overall hygiene but they're meticulous with high end audio.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • George Grand
    George Grand Posts: 12,258
    edited April 2008
    "Well my saxophone playin', and my wino career are in a slump,
    you know I find myself living, in a cardboard refrigerator box down by the Houston dump ..."

    Sorry, lost it for a minute. Nice amp.
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  • tonyb
    tonyb Posts: 32,957
    edited April 2008
    Great amp,great deal,for all you yutes posting about amps for your LSI HT.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    Please get this behemoth out of my basement! :)
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    No one needs a multi-channel amplifier.....damn tax season! : )
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    I dropped the price and included shipping if that brings you into my web.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • jakelm
    jakelm Posts: 4,081
    edited May 2008
    "Treated like a new girlfriend"



    WWAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    Monitor 7b's front
    Monitor 4's surround
    Frankinpolk Center (2 mw6503's with peerless tweeter)
    M10's back surround
    Hafler-200 driving patio Daytons
    Tempest-X 15" DIY sub w/ Rythmik 350A plate amp
    Dayton 12" DVC w/ Rythmik 350a plate amp
    Harman/Kardon AVR-635
    Oppo 981hd
    Denon upconvert DVD player
    Jennings Research (vintage and rare)
    Mit RPTV WS-55513
    Tosh HD-XA1
    B&K AV5000


    Dont BAN me Bro!!!!:eek:
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    It's 56lbs dry....65lbs packed and sealed, so CONUS shipping isn't cheap but IS included. That's a nice chunk of change saved for cables....Hint Hint :D
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    It's on the 'Gon but I'd rather move it down the road to a Polkie.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • ben62670
    ben62670 Posts: 15,969
    edited May 2008
    Guys if you are looking for a killer over built amp for your system this can't be beat at its cost. These are going for around $1000+ on Ebay plus shipping. The shipping is about $50 alone so the amp is less than $800:confused: And it is mint if Doro gives it a 9/10. No worries about getting junk, bad packaging, or defective product here.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    Thanks Ben, you're a gentleman and a scholar....and not to bad after all ;) Get your arse to Polkfest.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • ben62670
    ben62670 Posts: 15,969
    edited May 2008
    I am dying to get to PF! I can't wait to meet up with the Polk family. Lots of good guys, and girls here.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • dpowell
    dpowell Posts: 3,067
    edited May 2008
    If this amp is anything like the GFA-7500 I just added to my system, it will make someone's Polks SING! If you have'n't tried separates, you don't know what you're missing and you should jump on this.
    ____________________________________________________________

    polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS, SVS PB13 Ultra X 2, Pass Labs X1, Marantz 7704, Bob Carver Crimson Beauty 350 Tube Mono Blocks, Carver Sunfire Signature Cinema Grande 400x5, ADCOM GFA 7807, Panasonic UB420, Moon 380D DAC, EPSON Pro Cinema 6050
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  • dorokusai
    dorokusai Posts: 25,577
    edited May 2008
    dpowell wrote: »
    If this amp is anything like the GFA-7500 I just added to my system, it will make someone's Polks SING! If you have'n't tried separates, you don't know what you're missing and you should jump on this.

    It's basically the "newer" version of that amplifier Dpowell. The GFA-7500 was introduced in 1998, the GFA-7700 is from 2002.

    What did you upgrade from? I'm happy that you're happy :)
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • dpowell
    dpowell Posts: 3,067
    edited May 2008
    Upgraded from a Sony DA333ES integrated AVR and am using the AVR now as just a pre-amp.
    ____________________________________________________________

    polkaudio Fully Modded SDA SRS 1.2TLs + Dreadnaught, LSiM706c, 4 X Polk Surrounds + 4 X ATMOS, SVS PB13 Ultra X 2, Pass Labs X1, Marantz 7704, Bob Carver Crimson Beauty 350 Tube Mono Blocks, Carver Sunfire Signature Cinema Grande 400x5, ADCOM GFA 7807, Panasonic UB420, Moon 380D DAC, EPSON Pro Cinema 6050
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  • dorokusai
    dorokusai Posts: 25,577
    edited June 2008
    Anyone looking for some power from a real he-man's amp? That's not to say it wouldn't look good in a bra and panties....whatever floats your boat. Al Bundy approved....
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • engtaz
    engtaz Posts: 7,663
    edited June 2008
    Dang Doro that is a sweet amp. man am I glad I am broke. This amp is sweet. Adcom is good stuff.
    Dang, Dang, Dang, Dang, Dang,
    engtaz
    engtaz

    I love how music can brighten up a bad day.
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  • Neskahi
    Neskahi Posts: 297
    edited June 2008
    Help me here. With this amp, one can bi-amp with 4 of the channels. Correct?
    SDA 2.3/RDO's... xovers by Ben
    SDA 2.3TL/Stock..
    SDA 1C/Solens/RDO's [gave to my Uncle]
    SDA 2B RDO's
    Snell Type CV
    SDA 1.2TL's
    GFA7700 Adcom
    GFP750 Adcom
    TFM55X Carver
    M90 Pioneer/C90 Pre
    M91 x 2 Pioneers/C91 Pre
    Yaqin MC10l
    DCD-1520/1560/2560 Denon
    Marantz DVD-8400
    Carver m1.5T
    DV-79avi Pioneer
    TFM35X x 2
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  • dorokusai
    dorokusai Posts: 25,577
    edited June 2008
    Yes. You may do whatever you want, with whatever channel you want.

    Engtaz - My wife was kind enough to remind me of the "F**king box" in front of her treadmill tonight....naturally, jogging my memory.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • engtaz
    engtaz Posts: 7,663
    edited June 2008
    Waaaaaaaaaaaaaaaaa:D:D:D:D

    engtaz
    engtaz

    I love how music can brighten up a bad day.
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  • dorokusai
    dorokusai Posts: 25,577
    edited June 2008
    SOLD thanks Jim, you rule. See you in PM/Email.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
    · Share on FacebookShare on Twitter
  • engtaz
    engtaz Posts: 7,663
    edited June 2008
    Congrats Doro and Jim. Jim, good amp your getting.

    engtaz
    engtaz

    I love how music can brighten up a bad day.
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  • Neskahi
    Neskahi Posts: 297
    edited June 2008
    attachment.php?attachmentid=33886&stc=1&d=1213660690

    attachment.php?attachmentid=33887&stc=1&d=1213660690


    Well.... I got what was a pristine amp, until our friends at UPS decided to do some field modifications to it. It was packed quite well and for the life of me I cant imagine the abuse this package took while in transit. When I went to hook
    things up, I noticed an rca jack was... gone! So I removed the top cover and found that all of the heat sinks were shifted to the left, one so much that it
    pulled the rca jack back into the amp. All of the PC boards were bowing to
    a point that they would eventually crack and all of the rca jacks were cocked
    so that the interconnects were at an angle. This thing must have fallen from
    35K feet to do this kind of damage. Absolutely no external damage. Let me
    say again it was packed great.
    SDA 2.3/RDO's... xovers by Ben
    SDA 2.3TL/Stock..
    SDA 1C/Solens/RDO's [gave to my Uncle]
    SDA 2B RDO's
    Snell Type CV
    SDA 1.2TL's
    GFA7700 Adcom
    GFP750 Adcom
    TFM55X Carver
    M90 Pioneer/C90 Pre
    M91 x 2 Pioneers/C91 Pre
    Yaqin MC10l
    DCD-1520/1560/2560 Denon
    Marantz DVD-8400
    Carver m1.5T
    DV-79avi Pioneer
    TFM35X x 2
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  • Neskahi
    Neskahi Posts: 297
    edited June 2008
    The heat sinks are screwed to the bottom of the amp. I was able to loosen each
    of them and bend the screw holes to level and straiten PC boards and heat sinks, and
    get the amp rca jack mounted securely. The amp works great and does put some heat out.
    Now, can anyone tell me if I can use 4 of the channels to bi-amp 1.2TL's ? I tested the
    amp[bi-amped with 4 of the channels] on some Snell CV's and they sound better than ever. But will I run into the common ground issue on the 1.2TL's? Thanks.
    SDA 2.3/RDO's... xovers by Ben
    SDA 2.3TL/Stock..
    SDA 1C/Solens/RDO's [gave to my Uncle]
    SDA 2B RDO's
    Snell Type CV
    SDA 1.2TL's
    GFA7700 Adcom
    GFP750 Adcom
    TFM55X Carver
    M90 Pioneer/C90 Pre
    M91 x 2 Pioneers/C91 Pre
    Yaqin MC10l
    DCD-1520/1560/2560 Denon
    Marantz DVD-8400
    Carver m1.5T
    DV-79avi Pioneer
    TFM35X x 2
    · Share on FacebookShare on Twitter