# MXR Blue Box

> This gain entry consolidates documented MXR Blue Box variants, controls, settings and roles across dated guitarist pedalboards.

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

- **Category:** Gain
- **Types:** Octave fuzz, Two-octave divider
- **Also known as:** Blue Box, MXR M-103 Blue Box
- **Controls:** Blend, Footswitch, Output
- **Identification:** The model is identified.
- **Documented appearances:** 1 board, 1984

A compact bright-blue two-control octave-fuzz from MXR's original script-era family.

## 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 |
| --- | --- | --- | --- | --- | --- |
| John Cipollina | Stereo split-effects rig | 1984-04-01 | 7 | Source-described | https://pedalboardarchive.com/artists/john-cipollina/stereo-split-effects-rig-1984/ |