Used Electro-Harmonix Big Muff Op-amp Effect Pedal

Get classic ’70s op-amp fuzz with this used Electro-Harmonix Big Muff Op-Amp in good condition. Known for its aggressive sustain and cutting midrange, it’s perfect for soaring leads and thick rhythm tones. Simple controls for Volume, Tone, and Sustain make dialing in everything from gritty crunch to full-on wall-of-sound easy. Compact, pedalboard-friendly enclosure with standard 1/4" in/out and 9V DC power (center-negative).