Signature overdrive effects pedal that was designed to exact specifications of Andy Timmons (Danger Danger, Prawn Kings) and is basically a redesigned model of JHS Angry Charlie pedal. It has four knobs and a three position toggle switch. The "Volume" control controls the overall output level of the effect. The "EQ" control is a low pass filter that very naturally allows user to darken and brighten the overall tone of the pedal. The "Drive" control adjusts the amount of gain/distortion that is desired. The "Air" control is another low pass filter, but it is focused only on the high treble frequencies. This allows for pedal to perform perfectly with virtually any amplifier as user can adjust in fine detail along with the corresponding "EQ" control. The 3-Way toggle is called the "Headroom" toggle. In the down position it provides what is referred to as the 50 watt mode. The middle position is 100 watt mode and the up position is the 25 watt mode. These replicate different wattages of a tube amplifier, so just like a real tube amp, the 100 watt is loudest, the 50 watt is in the middle and the 25 watt has less overall volume but more drive on tap. The middle 100 watt mode is clean, loud and full of power. The down position 50 watt mode provides nice crunch/distortion that has a full frequency response. This mode is perfect for those looking for that classic British gain stage of the JCM800. The up position 25 watt mode reaches all the way into distortion territory and has rich harmonics, enhanced mid's and more of a cutting presence. This is an extremely versatile pedal that covers a large range of gain territory and it runs safely at 18 or 9 V.