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Mesa Boogie D-800+

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  • Mesa Boogie D-800+

    Hello folks,
    Has anyone have any experience with this D-Class Bass amp? I kinda figure these are just board replacement level type items. This one is outputting what basically a square wave. No caps are bulging or leaking anything out. Looks pristine.
    Thanx, glen

  • #2
    You could check the effx send and run a tone into the effx return to see if clipping is preamp or power amp. Beyond that, I know nothing about the thing without a schematic.
    "Yeah, well, you know, that's just, like, your opinion, man."

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    • #3
      Originally posted by Mars Amp Repair View Post
      Hello folks,
      Has anyone have any experience with this D-Class Bass amp? I kinda figure these are just board replacement level type items. This one is outputting what basically a square wave. No caps are bulging or leaking anything out. Looks pristine.
      Thanx, glen
      What voltage squarewave?
      160Vpp or so is normal clipping, 4Vpp or anything way below expected level means something wrong.

      Remember this amp has bridged/balanced out so NO speaker terminal must be grounded.

      Clip scope ground to amp ground, measure either + or - speaker out, each will provide half total, so 80Vpp each, thatīs fine.
      Juan Manuel Fahey

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