Electro-Harmonix Op-Amp Big Muff Pi Fuzz PedalThe Electro Harmonix Op Amp Big Muff Pi Fuzz Pedal is a faithful re creation of the original late 70s Op Amp Big Muff Pi. With original late 70s Op Amp Big Muffs selling for exorbitant prices, Mike Matthews decided to take the power to the people and reissue the classic pedal at a price that players could afford! The circuitry of the new EHX Op Amp Big Muff Pi, sometimes also referred to as the IC or V4 Big Muff, has been faithfully re created while