Used Electro-Harmonix Big Muff Op-amp Effect Pedal

Add legendary 70s-style sustain and gritty op-amp fuzz to your rig with this used Electro-Harmonix Big Muff Op-Amp. In good condition, it delivers thick distortion, singing lead tones, and punchy low end with simple Volume, Tone, and Sustain controls plus a Tone Bypass switch for extra bite. Standard 1/4" in/out makes it pedalboard-ready, and it runs on 9V DC power for easy integration into most setups.