If you are bored with standard distortion pedals, the Blue Box might be the right effect for you! To know how it sounds like, this pedal was responsible for the tone on Led Zeppelin’s Fool in the Rain. With the Blue Box kit you’ll build a pedal that delivers an aggressive fuzz, but that’s not it: what makes the Blue Box special is that it also produces a two octave down note, and you can choose how these two sounds are mixed together.
The Blue Box has two potentiometers. The Output knob selects the amount of volume, while the Blend knob lets you choose the amount of fuzz tones to be mixed with the two octaves down. While it may seem a simple pedal the Blue Box has a quite unpredictable behaviour, and will react in a very different way depending on the string you are playing the notes, your dynamics or the pickups you are using, making the Blue Box a very versatile effect perfect to get a different tone.
Download here the manual for the Blue Box Fuzz Kit: