Used MXR M103 Octave Blue Box Effect Pedal

Unleash massive, synthy low end with this used MXR M103 Octave Blue Box in great condition. It pairs a gritty fuzz with a -2 octave signal for thick, subharmonic tones that cut through any mix, from classic rock riffs to experimental leads. Simple controls let you blend fuzz and octave output to taste, and the compact, road-ready housing fits any pedalboard. Standard 1/4" input/output with 9V battery or DC adapter power.