Used MXR M103 Octave Blue Box Effect Pedal

Get rich, vintage fuzz and funky octave effects with this used MXR M103 Blue Box Octave Fuzz Pedal in great condition. This classic stompbox generates a thick fuzz tone and blends in a snarling, synth-like sub-octave for a unique and aggressive sound. Featuring simple controls for Output and Blend, you can easily dial in the perfect balance of fuzz distortion and octaving madness. Housed in MXR’s durable blue casing, this pedal is built to last and ready for any pedalboard. It operates on a 9V battery or optional AC adapter, making it convenient for any setup. Whether you're after growling bass-like depth or searing, glitchy leads, this MXR Blue Box delivers the legendary tones heard on countless recordings. Perfect for guitarists looking to add a distinctive character to their sound, this pedal is a must-have for fans of vintage-inspired effects with a modern build.