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Piezo ground needed in Piezo/Mag signal?

Discussion in 'Pickups & Electronics [BG]' started by Xanaptabil, Sep 19, 2005.

  1. Xanaptabil


    Jul 18, 2005
    Tempe, AZ
    Hello. I recently bought an ABM piezo bridge and have a couple questions.

    I want to use wood on the breaking point of each saddle for a more organic sound on my fretless. The wood is replacing a brass block that rests on top of each piezo crystal. So, I am assuming the ground will be broken for the piezo leads.

    Do the piezos have to be grounded if they are being fed into a mix with grounded magnetic pickups?

    I don't know anything yet because I am still waiting for a graphtech buffer to combine the signals.

    Any help is much appreciated,
  2. gyancey


    Mar 25, 2002
    Austin, TX
    The piezos, unless they've changed since I've seen that bridge last, get their ground from the shield of each individual piezo output wire, not through the string-block combination. Connect all the signal shields together at the preamp.
  3. Xanaptabil


    Jul 18, 2005
    Tempe, AZ
    Wow, sounds like a plan. So tapewounds on a completely unaltered ABM piezo bridge would not cause hum?