With the Keeley Katana Boost Robert Keeley presents a particularly powerful and wide sounding booster for electric guitar. Based on a fully analog Dual Class A JFET circuitry, the compact effects pedal offers up to 35 dB level boost and a particularly natural, transparent sound. Two different boost modes are available via the side-mounted volume controller. In the starting position the Keeley Katana provides a loud Pure Clean Boost, while a pull on the potentiometer gives the signal in High Gain Mode the additional portion of Dirt classic overdrives.