This is the larger sibling of the Phase 90 and offers a broader range of sounds in a larger unit. In addition to a speed control there is also a four position, rotary switch that allows a choice of four different intensities. The Phase 90 sound lies somewhere in the central two settings with the extremes offering softer and harder versions of the effect. Within these two controls you will find quite a supply of excellent sounds tucked away in this orange casing.