xEQ is a parametric EQ/Tone Control. It consists of Low and High shelf filters and three Peak/Cut filters. It is useful for placing around distortion effects - place one xEQ before your distortion effect to act as a preamp's tone control; place another xEQ after your distortion effect to simulate a speaker cabinet's frequency response curve. Some example presets are provided; presets that start with "TC" are tone control curves and those beginning with an "SC" are for speaker cabinet response curves.