Members J.D. Salinger Posted February 8, 2010 Members Share Posted February 8, 2010 I was wondering if it would be at all possible (or if anyone is offering this mod) to convert a current USA Big Muff into the '77-'78 Op-Amp version with a Tone Bypass switch or toggle of course. Any ideas or leads would be appreciated. Link to comment Share on other sites More sharing options...
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