If you love the first 2 Hendrix releases then you'll love this pedal, with 2 Germanium transistors hand-picked and tested for optimum performance. A Contour Knob lets you dial in Midrange, Harmonics and Sustain, also an Input Bias knob that takes out the ""woofiness"" and gives great Overdrive/Distortion sounds when its level is reduced. An Internal Trimmer allows for adjustment of Clipping Symmetry, Harmonics, and Tracking.