Crystal-clear and transparent overdrive. Years of tireless research in pursuit of the true vintage overdrive pedal tone have gone into the Green Crystal Overdrive. Dr. J brings you a compact pedal which delivers the characteristic tone of overdriven tube amplifiers: clear, transparent, warm and natural with a dynamic feel and no compression. The D50 features High and Low frequency knobs, 3 options for diode clipping, and a great adjustable tone range. You'll love the broad and natural range of frequency response. True Bypass design minimizes tone loss.