Used Electro-Harmonix Big Muff Op-amp Effect Pedal

This used Electro-Harmonix Big Muff Op-Amp delivers the iconic, singing distortion and sustain made famous by classic ’70s op-amp Muff tones, in great condition and ready to roar. Featuring Volume, Tone, and Sustain controls plus a Tone Bypass switch for extra midrange punch, it runs on standard 9V power and offers a true-bypass output for a clean signal when off. Perfect for huge riffs, soaring leads, and thick, fuzzy textures.