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Electro-Harmonix

Op-Amp Big Muff Pi Distortion/Sustainer

Op-Amp Big Muff Pi Distortion/Sustainer

Regular price $96.20 USD
Regular price Sale price $96.20 USD
Sale Sold out
Shipping calculated at checkout.

This listing is for a brand new pedal. Professor Nigel's is an authorized Electro-Harmonix dealer.

Professor’s Notes

The Op-Amp Big Muff Pi recreates the late-’70s “IC” Muff circuit made famous by Billy Corgan on Siamese Dream. It’s punchier and more aggressive than transistor-based Muffs, offering a distinctive fuzz character that stands out in a mix — all in a compact, affordable package.

Description

The Electro-Harmonix Op-Amp Big Muff Pi Distortion/Sustainer is a faithful reissue of the original late-1970s op-amp-driven Big Muff, long prized by collectors for its unique sound. Unlike traditional transistor-based Muffs, the op-amp design delivers:

  • More attack and clarity in the midrange.
  • Tighter low end with less “wooliness.”
  • Aggressive sustain that cuts through dense mixes.

Controls for Volume, Tone, and Sustain keep operation simple, while a Tone bypass switch allows players to lift the tone circuit entirely for extra raw output and presence.

Compared to vintage units — now scarce and expensive — the reissue brings the same iconic fuzz at a fraction of the cost, with modern reliability and a pedalboard-friendly size. Whether chasing Billy Corgan’s Pumpkins-era sound or just looking for a more articulate Muff, the Op-Amp Big Muff Pi delivers.

Specifications

  • Type: Analog fuzz/distortion pedal (op-amp circuit)
  • Controls: Volume, Tone, Sustain, Tone Bypass switch
  • Bypass: True Bypass
  • Audio: Mono input/output
  • Power: 9V battery included or optional 9VDC power supply (not included)
  • Current Draw: ~3mA
  • Dimensions: 4.75" x 4" x 2.25"

What’s Included

  • Electro-Harmonix Op-Amp Big Muff Pi pedal
  • 9V battery (installed)
  • Original packaging

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