MXR Phase 90 Expression Pedal

This page is dedicated to our expression pedal modification for the MXR Phase 90.

We use a special interface circuit to allow a Moog EP-3 Expression Pedal to control the rate of the Phase 90 when plugged in and the pedal will function as normal when the expression pedal is unplugged. The rate of the phaser increases when the expression pedal is rocked to the “toe down” position and goes to the slowest setting in the “heel down” position. The stock rate knob will set the lowest speed, the dial on the side of the Moog EP-3 will set the fastest speed. Please note that the expression pedal jack occupies the 9V battery compartment so battery power is no longer an option.

Phase 90 Expression Pedal Jack…………………………………………………….. $50