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Vox AC4C1 schematic and mod ideas

Discussion in 'Amp Tech Center' started by PurpleStrat, Feb 2, 2014.

  1. gusfinley

    gusfinley Tele-Afflicted

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    This is a great write-up. I have found that the "Custom" EQ sounds perhaps a little better in some settings (depending on what sound you are going for), but I always wire my vox amps up with the classic EQ - sometimes you just want that top boost strangeness in there.

    For those of you who have no idea what we're talking about, get Duncan's tonestack calculator and turn the Bass and Treble up to max, you'll see a huge notch filter around 500 Hz or so. I've ran an EQ into a Marshall DSL401 with the 500Hz band at minimum and it sounded very "voxish."

    Nice work, Bartimaeus!
     
  2. inuhadog

    inuhadog NEW MEMBER!

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    the bass sucker is c5. raise the value as you like.

    i want to get rid of static hum of my ac4-c1-12.
    it's very annoying when i throw a microphone on it at lower volume.
    is there anybody who had tryed up-grading power supply?
     
  3. FrankC

    FrankC TDPRI Member

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    AC4C1-Schematic.jpg
     
  4. FrankC

    FrankC TDPRI Member

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    A client brought this in for mods. Too thin he said. I swapped Treble and master VR changed the tone stack, and the input. Dropped the Master bright cap. Ordered a G10M Greenback. It's thick now. mod.jpg
     
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