Dusky Electronics Octomotron - Octave Fuzz  From Dusky

The Octomotron Fuzz is a new look at the classic octave fuzz circuit. Designed without reference to a particular pedal or circuit, the Octomotron has its own voice--brash and synthy. 

Adjusting your guitar's volume knob opens a dramatic range of timbres, making the pedal far more versatile than you might guess from its simplistic controls. A single glowing knob controls the output volume, and a switch to provides a subtle bass boost--which can take you from a classic octave fuzz voicing to a saturated synthy sound.

The Octomotron also features a specially designed FET input buffer that isolates your signal from whatever's upstream in your signal path. Unlike vintage fuzzes--which sound very different depending on whether your guitar is plugged directly into it, or if you have another pedal or a buffer in front of it--the Octomotron sounds the way it's supposed to regardless of where it is in your effects chain.

And, the Octomotron sounds great on bass too!