The original GTO was sort of the Nashville favorite, recreating the old Nobels ODR-1, a great sound in itself but Guthrie Trapp wanted more! The new GTO has a much tighter bottom, less gain and more cut in the mix. It can go from super mild to a really nice, dynamic OD feel. This pedal has compression but in a great way. You can use it as a clean boost and EQ or you can bring in the dirt. The Gain knob controls the gain level but also creates compression and feel. Accent controls the cut through the mix, the top end and the bite while Warmth controls the bottom end but is also very interactive with the Accent control.