Constructed with a Feed control for contouring the bass in the signal and taming unruly humbuckers, a Body knob for sculpting mids and adding just the right touch of compression, and a headroom switch which automatically doubles voltage and increases dynamic range, the OKKO Diablo Overdrive is much more than meets the eye. Still sporting standard overdrive controls like gain and volume, the expanded functionality on this model make it an excellent choice for guitarists who have a lot of sonic ground to cover in a set.