Used MXR M103 Octave Blue Box Effect Pedal

The used MXR M103 Blue Box Octave Fuzz Pedal in excellent condition delivers a unique blend of fuzz distortion and a deep, powerful sub-octave tone. This analog stompbox generates a heavily saturated fuzz while simultaneously adding a synth-like lower octave, creating thick, thunderous sounds perfect for experimental, psychedelic, and heavy rock tones. Featuring simple yet effective controls, the Output knob adjusts overall volume, while the Blend knob determines the balance between the fuzz signal and the deep octave effect. Housed in a rugged, road-ready metal chassis, this pedal is built for durability and reliability. Powered by a 9V battery or optional power supply, the MXR Blue Box is a classic effect used by legendary players like Jimmy Page to craft iconic, otherworldly lead and rhythm tones. Whether you’re looking to add gritty texture to your playing or explore unconventional soundscapes, this pedal is a must-have addition to any board.