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Seymour Duncan Blackouts Pre-amp

Discussion in 'Bass Central' started by gravyhighway, Dec 28, 2012.

  1. gravyhighway


    Feb 23, 2010
    Likes Received:
    I just got a Seymour Duncan Blackouts stacked knob pre-amp for this custom jazz bass I put together. The description of this thing said it was compatible with all pickups. I hooked it up to the Bassline Quarter Pound j-pickups. I got sound out of it but there is a a weird feedback when I roll the bass up. Is that something that should be expected or did I screw up somewhere in the connecting and soldering process.


    This is the bass in question.

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