Used MXR M103 Octave Blue Box Effect Pedal

Looking to add unique, vintage-style fuzz and octave-down effects to your tone? This used MXR M103 Blue Box Octave Fuzz pedal delivers a thick, synth-like sound perfect for experimental guitarists and bassists. In good condition, this pedal features simple controls for Output and Blend, allowing you to dial in anything from a subtle growl to a full-on subharmonic fuzz. The rugged metal enclosure ensures durability, while true bypass switching keeps your signal clean when the effect is off. Powered by a 9V battery or optional AC adapter (not included), this classic stompbox delivers the same unmistakable sound heard in legendary recordings. Whether you're chasing Jimmy Page-style octave fuzz or creating your own sonic chaos, the MXR Blue Box is a must-have for any pedalboard.