The Wampler Ecstasy Overdrive guitar effects pedal is designed to produce a huge range of sounds but never to overpower your fundamental tone. The Ecstasy pedal provides three options for the drive method Smooth, Open, and Crunch. Smooth is the most D-amp style sound, with presence and tremendous touch response. Open comes with a substantial volume boost, and has the most forward, least driven sound of any of the positions. Crunch is the higher gain pedal. Each of the three switch positions should be treated like a whole new variation on the pedal. Tone, Bass, Volume, and Gain controls.