Used MXR M103 Octave Blue Box Effect Pedal

The used MXR M103 Blue Box Octave Fuzz pedal delivers gnarly fuzz and a two-octave-down synth effect for truly unique tones. In good condition, this analog stompbox features Output and Blend knobs to control fuzz intensity and octave effect mix. Whether you're after thick bass-style leads or gritty experimental textures, the M103 offers versatile sound shaping in a compact, roadworthy enclosure powered by a 9V battery or adapter.