Used MXR M103 Octave Blue Box Effect Pedal

The Used MXR M103 Octave Blue Box Effect Pedal delivers classic analog fuzz and a fierce two-octave-down effect for gritty, synth-like tones. Housed in a rugged blue chassis and in excellent condition, this compact pedal features simple controls for Output and Blend, letting you shape your fuzz and octave mix effortlessly. Powered by a 9V battery or adapter, it's a favorite for experimental guitarists seeking vintage-inspired, unpredictable sounds.