MXR M103 Blue Box™ Octave Fuzz Pedal

The MXR Blue Box™ Octave Fuzz is one of the most distinctive fuzz pedals ever created. Combining a raw, aggressive fuzz effect with a signal that is dropped two octaves below your original note, the Blue Box delivers huge, synth-like tones that have inspired guitarists for decades.

From thick, subterranean riffs to chaotic experimental sounds, the M103 Blue Box creates a unique voice that stands out in any pedal collection. Perfect for players looking to explore vintage fuzz textures, octave effects, and creative sonic landscapes.

Features

✔ Classic MXR octave fuzz effect
✔ Mixes your dry signal with a signal two octaves lower
✔ Thick, aggressive vintage fuzz tones
✔ Creates unique synth-like and bass-heavy sounds
✔ Simple two-knob operation
✔ Compact and road-ready MXR housing
✔ Legendary effect used by generations of guitarists

Controls

Output

Adjusts the overall output level of the pedal.

Blend

Controls the mix between the fuzz effect and the two-octave-down signal.

Suitable For Use With

• Electric guitar

• Bass guitar

• Alternative rock

• Stoner rock

• Psychedelic rock

• Experimental music

• Recording and sound design

Benefits

✔ Massive low-octave textures
✔ Unique vintage fuzz character
✔ Creates synth-style tones without additional equipment
✔ Simple, intuitive controls
✔ Perfect for creative and experimental playing

Specifications

Power Options

The MXR Blue Box can be powered by:

• 9V battery

• Dunlop ECB003 9V power adapter

• Dunlop DC Brick™ Power Supply

• Dunlop Iso-Brick™ Power Supply

• Dunlop Mini Iso-Brick™ Power Supply

Power supply not included.

Perfect For

• Guitarists seeking unique fuzz tones

• Experimental musicians

• Stoner and psychedelic rock players

• Sound designers

• Recording studios

• Players wanting vintage octave fuzz sounds

The MXR M103 Blue Box™ Octave Fuzz delivers legendary low-octave mayhem and aggressive fuzz in a compact pedal, making it a must-have for adventurous players looking to push their sound into new territory.