Adcom GDA-600 DAC

daboyz
daboyz Posts: 5,207
edited November 2011 in For Sale (FS) Classifieds
I have a great sounding Adcom GDA-600 DAC. This is the second one I've owned. I sold the first and went to a dedicated CD player that I spent $600 for and realized that this sounded so much better with a good transport.

This has some light scratches and two dull rings and the faceplate has a couple very light marks but nothing major.

I had planned to upgrade this the way George did in this thread: http://www.polkaudio.com/forums/showthread.php?97185-The-Adcom-GDA-600-modification-thread&highlight=gda600

Unfortunately I never got around to it but I will throw in a bag of parts to get you started that George sent to me.

I'm looking for $175 shipped CONUS for this. Pics to come later.
Post edited by daboyz on
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  • starkiller
    starkiller Posts: 2,723
    edited October 2011
    Does the bag of parts have everything you need for the basic mod?
    Computer room Hegeman 1 SpeakersM&K VX-80 subKenwood DP-7010Cambridge Audio CXC Transport Rega DACPrimaLuna Prologue Four AmpAric Audio Tube PreampGarage Jennings Research SquareCustom tube preampCrown XLS-1000Denon DCD-1500II Modded MSB Link DAC
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  • daboyz
    daboyz Posts: 5,207
    edited October 2011
    No. I haveen't fully looked at all that was done but I am very sure that not all that you'd need is here.
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  • heiney9
    heiney9 Posts: 25,217
    edited October 2011
    The most expensive part of the modification is the OPA627 op-amps. The 627 are single channel and you need dual so you need (4) of them on an adapter.

    Here is the link that George and I and others bought from.

    http://cimarrontechnology.com/single-to-dualop-ampadapterpn020302.aspx

    You will need a quantity of (2) of the OPA627 @ $45 each for a total cost of $90 plus shipping. From the above link.

    There may be other less costly alternatives for op-amps, but the OPA627 is about the best going for this application. You will also need some other caps, etc. If George sent Dave the same parts he sent me they are caps for the power supply and you may need a couple more. I know George had to buy a minimum amount of each cap so he was giving away the extras.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • starkiller
    starkiller Posts: 2,723
    edited October 2011
    Problem is that I would have to have someone do the mod for me. Between less then zero d-i-y skills the peripheral neuropathy in both hands is getting worse...:rolleyes:
    Computer room Hegeman 1 SpeakersM&K VX-80 subKenwood DP-7010Cambridge Audio CXC Transport Rega DACPrimaLuna Prologue Four AmpAric Audio Tube PreampGarage Jennings Research SquareCustom tube preampCrown XLS-1000Denon DCD-1500II Modded MSB Link DAC
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  • heiney9
    heiney9 Posts: 25,217
    edited October 2011
    starkiller wrote: »
    Problem is that I would have to have someone do the mod for me. Between less then zero d-i-y skills the peripheral neuropathy in both hands is getting worse...:rolleyes:

    Maybe someone will step up. I had assistance with mine because of a lot of the intricacies and the wave soldered boards are always a PITA. It's a pretty straight forward mod, but it's tedious and time consuming. I'd volunteer but I don't have the time or the confidence to do it for someone else.

    Good luck

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • george daniel
    george daniel Posts: 12,096
    edited October 2011
    starkiller wrote: »
    Does the bag of parts have everything you need for the basic mod?

    nope--IIRC I was double shipped on some electrolytics--and I just passed em' around to those who were doing the mod.
    JC approves....he told me so. (F-1 nut)
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  • starkiller
    starkiller Posts: 2,723
    edited October 2011
    Pics yet by chance??
    Computer room Hegeman 1 SpeakersM&K VX-80 subKenwood DP-7010Cambridge Audio CXC Transport Rega DACPrimaLuna Prologue Four AmpAric Audio Tube PreampGarage Jennings Research SquareCustom tube preampCrown XLS-1000Denon DCD-1500II Modded MSB Link DAC
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  • daboyz
    daboyz Posts: 5,207
    edited October 2011
    d4755af18f28_43c7efef-ad3c-4367-aec8-67d058d2f79d.jpg
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  • daboyz
    daboyz Posts: 5,207
    edited October 2011
    f227aa6577ec_7af7a814-21b5-410d-90d4-4dac90376354.jpg
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  • daboyz
    daboyz Posts: 5,207
    edited November 2011
    Bump
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  • daboyz
    daboyz Posts: 5,207
    edited November 2011
    $165 is as far as I'll go on this. I could use the sale folks.
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  • daboyz
    daboyz Posts: 5,207
    edited November 2011
    Mark as sold. Thanks, Jay!!
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  • FTGV
    FTGV Posts: 3,649
    edited November 2011
    Congrats someone has themselves a very nice DAC for the money.
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  • agfrost
    agfrost Posts: 2,430
    edited November 2011
    Thanks, Dave! (And thanks Fred!)

    At some point in the future I'll be looking to do the "Fred-mod". I'm in the midst of clearing out some space in my rack for it.

    Jay
    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
    Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
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  • SCompRacer
    SCompRacer Posts: 8,514
    edited November 2011
    Congrats Jay! I got a new tank of MAPP gas for my torch, so we are a go for anytime you are ready to mod!:cheesygrin:
    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *
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  • heiney9
    heiney9 Posts: 25,217
    edited November 2011
    agfrost wrote: »
    Thanks, Dave! (And thanks Fred!)

    At some point in the future I'll be looking to do the "Fred-mod". I'm in the midst of clearing out some space in my rack for it.

    Jay

    Just few key part mods and this DAC is killer.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • agfrost
    agfrost Posts: 2,430
    edited November 2011
    Thanks Rich and Brock. Brock, the mod-thread may have played a small role in my decision-making process. :smile:
    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
    Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
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  • FTGV
    FTGV Posts: 3,649
    edited November 2011
    SCompRacer wrote: »
    Congrats Jay! I got a new tank of MAPP gas for my torch, so we are a go for anytime you are ready to mod!:cheesygrin:
    :eek: Ummmmm... and just what kind of mod's might we be proposing?
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  • agfrost
    agfrost Posts: 2,430
    edited November 2011
    Fred, I think Rich wants to add running hot and cold water. He's crazy like a fox.
    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
    Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
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  • FTGV
    FTGV Posts: 3,649
    edited November 2011
    agfrost wrote: »
    Fred, I think Rich wants to add running hot and cold water. He's crazy like a fox.
    Adding liquid cooling is certainly a novel idea but I,m not entirely sure it's necessary.Full props to Rich though for wanting to push the envelope.
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  • george daniel
    george daniel Posts: 12,096
    edited November 2011
    he,he,,,to boldy go where,,,,, :loneranger:
    JC approves....he told me so. (F-1 nut)
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  • agfrost
    agfrost Posts: 2,430
    edited November 2011
    :razz:
    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
    Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
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  • daboyz
    daboyz Posts: 5,207
    edited November 2011
    IIRC Rich likes to flood things,especially basements so I'd be careful. Just a thought.......:smile:
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  • SCompRacer
    SCompRacer Posts: 8,514
    edited November 2011
    OK, so I'm into the apocolypse concepts!:cheesygrin:
    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *
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