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Vintage audio integrations and upgrades

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Reaching the best sound quality possible

  • Carver C-4000/4000t Upgrade and Restore

       (1 review)

    The Carver C-4000 and 4000t are similar but also very different. However, restoring them and upgrading them are similar enough to include together. These preamps require a complete overhaul after nearly 40 years of use. We replace all the electrolytic capacitors with either high temp, long life type, bi-polar or low ESR where appropriate. We tear the unit down completely and recondition all the wipers on the attenuation knobs and buttons. Some units require factory updates and power supply fixes. All of these units also require the phono amps, time delay, auto correlator and sonic holography circuits to be tuned and calibrated. The unit is also cleaned and polished, fully tested and we listen to it to ensure it sounds better than ever. The results of our work are stunning!


    High quality parts and expert workmanship.





    Gundry Filter board installed on the Sonic Holography PCB.



    New LEDs for the faceplate.




    Restore Price: $420

    Gundry Filter for Sonic Holography: $40

    LED color change: $40

    Remote control Volume: $150


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    John Smallwood

       7 of 7 members found this review helpful 7 / 7 members


    Years ago, when they first were sold, I had a C-4000 but had to sell it.  Recently, I wanted to return to the pre-amp but I was hesitant because of its complexity and age.  Luckily, I found Nelion through the Carversite, and reading the recommendation from Bob Carver about Greg's work was all I needed to see.  I bought the nicest one I could find and shipped it to Greg.  I received it last week, and it sounds fantastic.  I can't take my eyes off it, and can't stop listening to it.  Although it is a complex piece, if you truly admire Bob Carver's work it's a privilege to have one of these as the heart of your system, and it's great to have Greg and his team to bring it back to spec and beyond.

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