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Get that fuzz tone you’ve been looking for with the new EHX Big Muff PI Op-Amp Reissue! Made famous by the Smashing Pumpkins record “Siamese Dreamand used on countless records the Big Muff Op-Amp Reissue uses three gain stages and an op-amp rather than a transistor based circuit. While keeping with the original design they did add a few new features such as true bypass switching and a compact die-cast box. As far as controls go you get tone control sustain volume controls. Comes with a 9v battery and ready for your pedal board! Get your fuzz on today!