The Hoof is a no-fuss, easy to use device capable of sounds from warm, gritty overdrive to a huge sustaining fuzz. It’s a germanium/silicon hybrid muff style fuzz (based on the old green russian muff) with massive amounts of volume on tap and smooth amp-like sustain. It has a tighter, cleaner sound than most muff’s which makes it more cutting and discernible in a band setting. The shift control changes the frequency response of the tone control, mainly on the treble side (but takes out the mud on the bass side). Clockwise scoops the mids and counterclockwise enhances the mids. When the shift control is set dead center it has roughly the same frequency response as the original 3 knob hoof (almost flat).
There is no audible difference between the hoof pictured and the previous gold box version. The circuit is EXACTLY the same.