The MXR M107 Phase 100, the larger sibling of the Phase 90, provides a wider array of sounds. It features a speed control and a four-position rotary switch that selects from four distinct intensity levels, each corresponding to a preset waveform pattern. With these settings, a variety of superb tones are housed within the orange enclosure.

Controls include: a footswitch that toggles the effect on or bypasses it, indicated by a red LED; an Intensity knob for selecting one of the four preset phase waveforms; and a Speed knob to adjust the rate of the phase sweep.