Used Electro-Harmonix Big Muff Op-amp Effect Pedal

Get classic ‘70s-era fuzz with this used Electro-Harmonix Big Muff Op-Amp in great condition. Designed around an op-amp gain stage, it delivers tight, aggressive distortion with long sustain—perfect for riffs, leads, and thick walls of tone. Simple, gig-ready controls include Volume, Tone, and Sustain for quick dialing on any amp. Runs on a standard 9V battery or 9V DC center-negative power supply for easy pedalboard use.