# MXR Phase 90

> This modulation entry consolidates documented MXR Phase 90 variants, controls, settings and roles across dated guitarist pedalboards.

- Canonical page: https://pedalboardarchive.com/pedals/mxr-phase-90/
- Machine-readable index of the archive: https://pedalboardarchive.com/llms.txt
- Evidence and reconstruction conventions: https://pedalboardarchive.com/methodology/

- **Category:** Modulation
- **Types:** Modulation, Phaser
- **Also known as:** EVH90 phaser, MXR EVH Phase 90, MXR Phase 100, MXR Phase 90, MXR Phase Shifter, MXR phaser, Phase 10, Phase 90, script logo Phase 90, script Phase 90, Script-logo Phase 90
- **Controls:** Bypass, Footswitch, Script mode, Speed
- **Identification:** The model is identified.
- **Documented appearances:** 10 boards, 1978–2024

A compact single-knob MXR phaser; the exact model in this rig is disputed between sources.

## Documented boards

Each row is an observed appearance on a dated board. A position is only an observed one where that board's order evidence says so.

| Artist | Board | Date | Positions | Order evidence | Page |
| --- | --- | --- | --- | --- | --- |
| Albert King | Late-career single-phaser path | 1978-01-01 | 1 | Source-described | https://pedalboardarchive.com/artists/albert-king/late-career-phase-90-rig-1978/ |
| Eddie Van Halen | Debut-era modulation path | 1978-02-10 | 2 | Source-described | https://pedalboardarchive.com/artists/eddie-van-halen/debut-era-1978/ |
| John Frusciante | Californication era board | 1999-06-08 | 7 | Reconstructed | https://pedalboardarchive.com/artists/john-frusciante/californication-era-board-1999/ |
| Paul Gilbert | Mr. Big split touring rig | 2011-11-09 | 4 | Source-described | https://pedalboardarchive.com/artists/paul-gilbert/mr-big-split-rig-2011/ |
| Pete Thorn | Musicom Lab switching board | 2014-07-07 | 8 | Source-described | https://pedalboardarchive.com/artists/pete-thorn/musicomlab-switching-board-2014/ |
| Richard Fortus | Guns N' Roses touring effects system | 2017-07-06 | 2 | Reconstructed | https://pedalboardarchive.com/artists/richard-fortus/not-in-this-lifetime-tour-2017/ |
| Slash | Blues Ball floorboard | 2024-07-10 | 5 | Source-described | https://pedalboardarchive.com/artists/slash/blues-ball-tour-2024/ |
| Steve Vai | Story of Light experimental rig | 2012-01-04 | 5 | Reconstructed | https://pedalboardarchive.com/artists/steve-vai/story-of-light-rig-2012/ |
| Thurston Moore | By the Fire interview pedalboard | 2021-01-25 | 4 | Reconstructed | https://pedalboardarchive.com/artists/thurston-moore/by-the-fire-interview-board-2021/ |
| Tom Morello | Long-term effects-loop board | 2019-02-13 | 6 | Reconstructed | https://pedalboardarchive.com/artists/tom-morello/long-term-rig-2019/ |