Description
Before it got expensive to be a Big Muff collector, this was just the pedal everyone used in the late ’70s. Electro-Harmonix brought back the circuit known among tone historians as the Op-Amp, IC, or V4 Big Muff, built around op-amp gain stages rather than transistors and running three gain stages instead of the usual four. The result sits apart from other Big Muff variants: thicker, more compressed, and grittier at the edges, with a crunch that cuts through a dense mix instead of just piling on low end.
Billy Corgan leaned on the original for the Smashing Pumpkins’ Siamese Dream, and that’s the sound this reissue is chasing — huge, saturated rhythm tones and leads that stay articulate under heavy gain. On the board, it works well either up front for straightforward fuzz-distortion or after a compressor to tighten up the low-mid mass before it hits your amp.
EHX kept the control set simple — Volume, Sustain, and Tone with a Tone Bypass switch to pull the mids back into the signal for a rawer, more direct push. True bypass wiring means it disappears from the chain cleanly when off, and the compact die-cast enclosure keeps the footprint sensible for boards that are already crowded with modulation and time-based pedals.
- Faithful recreation of the original circa-1978 Op-Amp circuit
- Volume, Sustain, and Tone controls plus a Tone Bypass switch
- True bypass switching
- Compact, rugged die-cast chassis
- 9V battery included; runs on optional 9.6VDC-200mA adapter (not included)
- Dimensions: 4.5 x 2.75 x 2.1 in
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