Used MXR M103 Octave Blue Box Effect Pedal

Experience wild analog fuzz and quirky octave-down tones with this used MXR M103 Blue Box Octave Fuzz pedal, offered in great condition and fully functional. This iconic effects unit combines a heavy fuzz distortion with a two-octave-down signal, creating a thick, synth-like sound that's perfect for experimental and classic rock tones alike. Featuring simple controls—Output and Blend—you can dial in just the right mix of fuzz and sub-octave to suit your style. Housed in its signature bright blue metal chassis, this pedal is both roadworthy and distinctive on any pedalboard. Powered by a 9V battery or standard 9V DC adapter (not included), it's ready to deliver unique textures whether you're on stage or in the studio. A favorite of legends like Jimmy Page, the MXR Blue Box is a must-have for any player looking to push sonic boundaries.