MXR M103 Blue Box Fuzz/Octave Pedal

No longer available at zZounds
This pedal fuzzes up your tone and duplicates each note 2 octaves lower. You get to control the ouput of the mix and effect.

This unassuming little box shovels out enough low frequencies to scare a blue whale. It takes your guitar signal, fuzzes it up, then duplicates it two octaves down. You control the output and the mix between the dry signal and the effect. Using it 100% wet is quite an experience, but more recognizable sounds appear as you dial In more dry signal. The Blue Box is known for having a chaotic personality that can make each session a totally unique experience! Powered by a single 9 volt battery or Dunlop's ECB-03 AC adapter.

Footswitch toggles effect on/bypass (red LED indicates on) Output knob sets total output gain Blend knob adjusts ratio of dry (clean) with wet (effects) signal.

Hear some of the juicy tones of M103 Blue Box in this video from MXR:

Knobs: Output, Blend

Dimensions: 4-3/8 x 2-3/8 x 1-1/4 in.

Color: Blue

For support or warranty questions, please contact the manufacturer:
Phone: 707-745-2722

Reviewers gave this product an overall rating of 4 out of 5 stars. (23 ratings)
Submitted March 26, 2020 by Mark Garner in Metairie, LA

"A Truly One Of A Kind Sound"

Overall: 4 out of 5 stars
(see rating details)
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First off, THIS ISN'T A PEDAL FOR EVERYBODY. The Blue Box is an ancient design - from around 1974. It's glitchy and works best on the A, D & G strings in the upper registers (above the 10th fret or so). And it isn't polyphonic - single notes only.Now, having said that, the sound it produces is truly unique to this pedal. Thick and wooly! I had the Boss OC-3 Super Octave and HATED IT. (It's best function is as a paperweight.) The biggest complaint I have with this pedal is that it isn't very loud, the volume drop when you engage the pedal is quite hard to miss. I solved that problem by running the pedal into an MXR Classic Overdrive. If you want to blow up a small guitar amp, this may be your ticket. I find it's best to palm mute the strings. Any extraneous noises interfere with the signal processing. I would indeed recommend this to a friend but with warnings. It may not work too well in a live setting but it's a great studio toy. Jimmy Page's solo in 'Fool In The Rain' is probably the best known use of this pedal but Wings guitarist Jimmy McCullough put one to good use on 'Wino Junko' from the 'At the Speed of Sound' album.

Musical Background:

Former semi-pro now a stay-at-home jammer.

Musical Style:

Rock, rock and rock.
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