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  • Carver M-4.0t TFM-45 TFM-42 Restore and upgrades

       (1 review)

    The restore for the Carver M-4.0t amp and its kin includes replacement of all consumable parts with high quality audio grade components, replacement of vital thermal isolators on output stage, upgrade of power supply rectifiers, upgraded input wiring to noise rejecting premium microphone cables, reflow of questionable solder, all service bulletins, and cleaning inside and out. The restore includes extensive work involving the power supply and signal path:

    • The high voltage rail capacitance is significantly increased with a low ESR array to greatly improve transient response. Long-life, audio grade Nichicon capacitors are installed for the low voltage rails.
    • The old ceramic and polyester capacitors are removed from the signal path and replaced with modern film type.
    • Critical resistors are replaced and upgraded with high quality metal film.
    • The transfer function is meticulously calibrated to the originally intended response for a smooth, accurate and musical experience.

    As a result, amplifier's noise floor and power are much improved, and it's longevity extended for decades. We do not just perform a simple 'recap' like most others. Many techs and DIYers are not aware of the intricate service bulletins and updates which are necessary to make these amps perform at the very best. Flippers on Ebay may offer a good deal, but you're not getting what you really expect. All they do is replace some capacitors and if the unit powers up, they list it.

    Trust the experts. We know how a Carver should work and sound.

    Complete disassembly of amp:

    Carver M4.0t restore and repair 1                           image.png


    Clean Up:

    image.png   image.png 


    Thermal isolators replaced on the output stage:

    image.png   image.png


    Power supply upgrades:




    Finished TFM-42:



    IEC socket option (power cable not included):



    Gold 5-way binding posts:




    The 'audiophile' restore option. As a complete package, the amp is upgraded on many levels. New speaker posts, IEC socket, new premium wiring, gold plated RCA jacks, new LEDs (if applicable), signal path upgraded, power supply upgraded, fully restored and cleaned. The result is an amplifier that performs better than factory with upgrades it should have always had to run with a truly advanced system in terms of quality and prestigious appearance. 

    Carver TFM-42 TFM-45 M-4.0t Audiophile Restore.jpg


    Comes with the Nelion Audio 3-year warranty.

    Cost: $370.00

    Add the optional LED upgrade with the color of your choosing for: $40.00

    Add gold plated 5-way binding posts for: $40.00

    Add IEC C-14 socket: $40.00

    Add Gold RCA jacks: $20.00


    The 'Audiophile Refurb' with LED upgrade, gold binding post upgrade, IEC socket and premium silicone interconnect wiring all in one service!  $440.00


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    Felton Bohannon

       2 of 2 members found this review helpful 2 / 2 members

    After shipping my M-4.0t and CT-7 preamp, I decided to go with the audiophile restoration instead of the basic restoration.  The work is beautiful, and I will be a while getting used to the smooth, quiet, powerful sound that comes out of this restored combination.  Even with hearing damaged from age, military service, and a career in restoration carpentry, I can hear wonderfully.  For the first time, I am leaving the bass, mid-range, and treble controls set flat, and love the sound.  This is money invested, not spent, on some of the best sound that I could ever afford.  I am thankful to have equipment that I love at a price that is a bargain.  

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