MXR M103 Blue Box Octave Pedal

2-octave Down Fuzz Pedal
MXR M103 Blue Box Octave Pedal image 1
MXR M103 Blue Box Octave Pedal image 1
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MXR M103 Blue Box Octave Pedal
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Chaotic - With a Healthy Dose of Fuzz!

Are you bored with "conventional" distortion boxes? The Blue Box from MXR is a monster distortion pedal, giving you both an aggressive fuzz that'll rip your head off and an unpredictable (in a good way!) two-octave-down tone generator. It's dead-simple to use: turn the Output knob to dial in the amount of fuzz you want and use the Blend knob to dial in how much double-octave sound you want. More conservative settings on the Blend control yield familiar sounds ("Fool in the Rain"). Dial the Blend up to 100% and the MXR Blue Box starts spitting and glitching 8-bit-style nonsense on par with smashing an Atari (again in a good way!). There's a ton of fun and chaos to be had here, which is why the MXR Blue Box has become a go-to pedal for the sonically adventurous.

MXR Blue Box Fuzz-Octave Pedal Features at a Glance:
  • Aggressive fuzz tones
  • 2-octave-down tones
  • Output and Blend controls
  • 9V battery operation or optional power supply
A staple of noise rock and beyond - MXR's Blue Box!

Additional Media

Blue Box User Manual

Tech Specs

Pedal Type 2 Octave Down Fuzz
Inputs 1 x 1/4"
Outputs 1 x 1/4"
Batteries 1 x 9V
Manufacturer Part Number M103

Customer Reviews

Based on 8 reviews
Write your review

Mxr blue box

Exactly what I was looking for. Makes your guitar sound like an 8bit Nintendo. Beware, significant volume drop when pedal is engaged. Performing an r11 mod will get your volume back and expand the synth-sounds out of the pedal. Would buy again.
Music background: Gigging/studio guitarist

great solo pedal

this pedal blew my mind. i watched the video and other reviews. i had a good idea of what it would sound like. the video portrayed it to be a tight thick fuzz when the blend knob is all the way up and two octaves low fuzz bass sound when the blend is all the way down and blend of the two in between. What you get is a a fuzz that sounds battery starved, it get intense, and on the low end you get a pedal that cant decide if its an octave down or two octaves down. its really all about how you have your neck pickup set up with the octave sound. this pedal is great for those nasty experimental solos but its not for everyone. If you like the edgy experimental rock/indie stuff and off the wall solos this pedal is yours and i reconmend it toanyone looking to toy around with a new sound. this pedal is one of a kind.
Music background: frontman

Brown note!

This pedal is beyond great. If you want something unique, look no further! The fuzz is very gated like a Devi ever kind of sound. Roll back your tone knob and it is a classic fuzz sound. Octave down fattens up single-note riffs and 100% wet sounds like an analog synth. Use the neck pickup or roll back tone for better tracking. Also, cutting out the capacitor marked c11 will make this pedal louder and cooler.
Music background: Guitarist, project studio owner

Pandora's Blue Box

Great pedal, if you have a particular purpose. Otherwise, it is a pedal you noodle with to find an inspiration. But I suppose most unusual effects pedals are that way. Love MXR products.
Music background: Studio Recluse

Unique Pedal for Unique Musicians

All of the review videos pretty much capture the whole spirit of the pedal. It's uncontrollable, glitchy, monstrous, and incredibly fun. I actually play my ukulele through this pedal and it sounds great. Tracking is a little delayed and sometimes can't decide which octave it wants to go to, but that's perfect for my sound. A little Jack White-y, and little Beck-y, and, of course, Led Zeppelin...y (Fool in the Rain). A straightforward pedal for a great price, though I'd recommend trying it out just to feel it before you buy it if you get the chance.
See also: Distortion Pedals, MXR, MXR Distortion, Overdrive, Boost & Fuzz