The Earth Drive is the ultimate boost/overdrive pedal, designed to retain your instrument's natural character while providing an organic, full-bodied, yet transparent sound. Use the Earth Drive as a clean boost to add warmth and smoothing, or turn up the drive knob and get a wide spectrum of overdrive harmonics and singing sustain. The Earth Drive has a huge range of boost control with its volume knob, while the tone knob helps you perfectly dial in the treble response. Whether you play bass, pedal-steel, electric piano, electric guitar, organ, whatever, the Earth Drive is quite possibly the most useful and versatile drive pedal you've ever heard.