Description
The Phase 100 takes the classic MXR phasing formula and gives it more room to breathe. Where the Phase 90 keeps things simple, this M-107 hands you a four-position rotary switch that steps through four preset waveform intensities, each one reshaping how the sweep pulls and pushes against your signal. Pair that with the dedicated speed knob and you’ve got a much wider tonal window to work with than the smaller unit offers.
On a pedalboard, this is the kind of phaser that rewards a bit of experimentation. Dial the intensity down and the speed slow for a subtle, watery shimmer that sits underneath a clean tone without crowding it. Push the intensity up and let the speed climb, and it turns into something far more aggressive — a swirling, almost vocal throb that cuts through a saturated amp or a fuzz pedal placed ahead of it. Because the waveform patterns are preset per switch position rather than continuously variable, each setting has its own character, so it’s worth running through all four to find the sweep that matches the song.
Housed in MXR’s familiar orange casing, it’s built for the same road-ready durability players expect from the brand, and it slots easily into a chain alongside other modulation or drive pedals.
- Four-position rotary switch for selectable intensity/waveform presets
- Dedicated speed control
- Larger enclosure than the Phase 90 for expanded phasing range
- Classic MXR orange housing
If you’ve outgrown the Phase 90 and want more depth to explore, the Phase 100 is where that search ends.






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