# MXR Phase 100

> This modulation entry consolidates documented MXR Phase 100 variants, controls, settings and roles across dated guitarist pedalboards.

- Canonical page: https://pedalboardarchive.com/pedals/mxr-phase-100/
- 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:** MXR Phaser, MXR Phaser 100, Phase 100
- **Controls:** Feedback, Intensity, Intensity selector, Speed, Waveform
- **Identification:** The model is identified.
- **Documented appearances:** 3 boards, 1978–2026

A large orange four-control phaser with two main knobs, two four-position selectors and one footswitch.

## 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 |
| --- | --- | --- | --- | --- | --- |
| Jerry Garcia | Wolf onboard-loop effects chain | 1978-06-01 | 4 | Source-described | https://pedalboardarchive.com/artists/jerry-garcia/wolf-obel-effects-chain-1978/ |
| Keith Richards | North American tour effects | 1981-01-01 | 1 | Reconstructed | https://pedalboardarchive.com/artists/keith-richards/north-american-tour-effects-1981/ |
| Marcus King | 2026 touring board | 2026-07-09 | 7 | Reconstructed | https://pedalboardarchive.com/artists/marcus-king/touring-board-2026/ |