The IK Multiedia Z-Tone is a DI/Preamp/Boost pedal with advanced tone shaping capabilities, active/passive input selector, two selectable channels (PURE and the warmer JFET) and a variable impedance control knob (Z-Tone). It features the input circuit of the Italian company's AXE I/O interface. https://www.youtube.com/watch?v=ifVTl0Ksl4oClick on the title for more