The JHS Pedals The Crayon is an overdrive pedal that is a smaller version of the JHS Colour Box pedal and emulates the distorted tones of a guitar plugged directly into a vintage British studio preamp, most notably heard in the guitar intro to The Beatles’ “Revolution.” Featuring master, pre-volume and EQ knobs, as well as a high-pass filter switch, the pedal is capable of fuzz, distortion, and overdrive tones.