The Hughes & Kettner Tube Rotosphere II summons true Leslie tone in a hefty, steel-faced pedal through features like fast and slow modes, a rotor balance controls, and individual knobs for drive and output. Built on the foundation of an actual Hughes & Kettner 12AX7 vacuum tube which is visible on the front, the second iteration of the Rotosphere introduces a guitar/keyboard switch on the top which allows for wholly separate impedance and EQ settings.