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SKU: 10826

Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer Pedal

  • Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer
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Replay Guitar Exchange
only $80.60

only $80.60

Questions? Call Us! 813-254-8880 or 844-REPLAY1
Questions? Call Us! 844-REPLAY1 (844-737-5291)
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Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer

"The Op-Amp Big Muff was popularized by the brilliant Billy Corgan, who first used it on the Smashing Pumpkins’ epic 1993 album Siamese Dream. After he was videotaped playing and talking about the reissue, Billy stated: ‘The magic’s still in the box. I can still get what I’m looking for!'" - Mike Matthews, founder, Electro-Harmonix


Replay Guitar Exchange is proud to present this faithful reissue of the Electro-Harmonix Op-Amp Big Muff Pi distortion/sustainer pedal. With original late-70s Op-Amp Big Muffs selling for exorbitant prices, Electro-Harmonix founder 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 Op-Amp Big Muff —sometimes also referred to as the IC or V4 Big Muff— has been faithfully re-created while several practical enhancements have been added — including a compact, die-cast chassis and true bypass switching.

The pedal relies on op-amps rather than transistors and three gain stages, rather than four, to create its signature sound. It’s a tone that’s been described by noted Big Muff collector and historian Kit Rae as 'a huge, crushing Big Muff sound with more crunch... great for grungy, wall-of-sound distortion, heavy rhythm playing and heavy leads.'

As always, feel free to contact Replay Guitar Exchange via chat, email or phone for more details, or with any questions.


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