Successfully updating the popular PDF-1, the Stone Deaf FX PDF-2 is a parametric distortion that can be used with virtually any instrument -- guitar, synth, bass, even acoustic guitar and analog piano. You name it and the PDF-2 will deliver highly customizable distortion. With a super low noise floor and a slew of updates based on actual player requests, the PDF-2 is one of Stone Deaf's most user-friendly pedals. Parametric EQ with adjustable distortion and tons of expression pedal functionality, like frequency control knob sweeps, wah, and phaser control make the PDF-2 one killer pedal.