Originally designed to connect a Mojo Classic to an 11-pin Leslie speaker. But with this ingenious box, you'll be able to connect all kinds of instruments. For example the Wurli sound of a Crumar SEVEN will sound incredible ove a Leslie speaker! Just connect a sustain pedal to control the Rotary effect. Another possibillity, just connect the midi of your keyboard to the Eleven, your modulation wheel will trigger the Rotary effect.