The Hot Head Distortion is a multi-purpose pedal for any music style where distortion is needed. Armed with flexible Low, High, and Gain controls, the Hot Head can dial in just the right tone for your setup. If you just want a little dirt or you need your amp to sound like a full stack, the Hot Head lets you rock with the best. 1. Level Knob Controls the distortion output level. Turn this knob clockwise to increase the output level, and counter-clockwise to decrease output level. 2. Low Knob Controls the boost or cut of low frequencies. Turn this knob clockwise to increase the low frequency content, and counter-clockwise to decrease the low frequency content. 3. AC Adapter Jack Connect a DigiTech PS200R power supply to this jack. Use the proper supply for your area�s Mains line voltage.