Used 1970s MXR Octave Blue Box Effect Pedal

Vintage 1970s MXR Octave Blue Box in good condition, delivering gritty fuzz with a synth-like sub-octave effect. This analog pedal features two simple controls—Output and Blend—for crafting iconic, harmonically rich tones. Renowned for its unmistakable sound used by legends like Jimmy Page, it runs on a 9V battery and includes original circuitry. A rare find for collectors and tone enthusiasts seeking classic octave-fuzz textures with vintage character and rugged build quality.