MXR Phase 90- Vintage, Reissues, Block and Script logos, EVH model.


This page is dedicated to expression pedal modifications for the Phase 90. Click to check out our standard MXR Phase 90 modifications.

The Phase 90 uses an usual potentiometer value so simply wiring the pedal to accept a standard expression pedal is not a good option. We use a special interface circuit to allow the expression pedal to work with the Phase 90 when plugged in but the pedal will function as normal when the expression pedal is unplugged. A benefit of the expression pedal modification is the ability to change the rate of your effect while still playing. It also increases the fastest rate of the phaser when the expression pedal is rocked to the "toe down" position. We currently have two versions of the expression pedal mod designed to fit your setup. Please note that the expression pedal jack occupies the 9V battery compartment so battery power is no longer an option.

If you'd like to have a custom expression pedal we offer one that is built into a heavy duty die cast enclosure. The custom expression pedal has a ¼" jack and a maximum rate knob on the opposite side. We can also convert Dunlop and Vox wah pedals. Non-working donor casings are acceptable as well. Don't have a spare wah? We often have converted expression pedals (shown above; right) available.

If you'd like to use a standard Moog EP-3 expression pedal we offer a version of the expression pedal mod for that. These pedals are a great alternative as they are significantly cheaper than having a custom expression pedal made. While they are made of plastic they are still very sturdy and smooth. The knob on the side controls the maximum speed.

 

Phase 90 Expression Pedal Jack............................................................................... $50
Custom Expression Pedal (new)................................................................................ $110
Custom Expression Pedal (converted used wah)....................................................... $65
Convert Wah Pedal to Exp. Pedal (shell supplied by customer)................................ $30
Hosa CSS103 Stereo ¼" Cable.................................................................................. $5