from acornamps.com:

Seemingly crafted by the hands of the Kwisatz Haderach, the Mind Killer by Acorn Amplifiers is a dual distortion device that guarantees to deliver total obliteration in the form of huge gain tones to any rig. Featuring two separately stomp-able distortion circuits in series, each with their own bass boost and clipper diode toggle switches, the Mind Killer offers a mélange of stackable crunch tones in a single stompbox.