# PSM-5 Power Supply & Master Switch

> This routing & control entry consolidates documented PSM-5 Power Supply & Master Switch variants, controls, settings and roles across dated guitarist pedalboards.

- Canonical page: https://pedalboardarchive.com/pedals/psm-5-power-supply-and-master-switch/
- Machine-readable index of the archive: https://pedalboardarchive.com/llms.txt
- Evidence and reconstruction conventions: https://pedalboardarchive.com/methodology/

- **Category:** Routing & Control
- **Types:** Line selector, Power supply, Routing
- **Also known as:** Boss PSM-5, Master switch
- **Controls:** Loop send/return, Master bypass, Power distribution
- **Identification:** The model is identified.
- **Documented appearances:** 1 board, 1986

A compact Boss unit combining a power distributor with a master bypass and a send/return loop.

## 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 |
| --- | --- | --- | --- | --- | --- |
| Johnny Marr | Smiths BCB-6 board | 1986-01-01 | 1 | Source-described | https://pedalboardarchive.com/artists/johnny-marr/smiths-bcb-6-board-1986/ |