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Boss PSM-5 Power Supply & Master Switch

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Photo of Boss PSM-5 Power Supply & Master Switch and more gear in a pedalboard, guitar, and live

Boss PSM-5 Power Supply & Master Switch

^# 19

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$40.00 Price Tier: Budget

4.0 (11)

2 Reviews

This product is Vintage or Discontinued

Find out who is using Boss PSM-5

6 community setups

10 wishlisted

54 saved

Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 26, 2026.

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Reviews

Price

5.0 (19)

$40.00 15 available Used

View Deal

Average Price: $40

Budget/Beginner

$60

$176+

Price Tier

In the Switch Effects Pedals category, Boss PSM-5 Power Supply & Master Switch is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

Budget

Standard

High-end

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Description

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The Boss PSM-5 Power Supply & Master Switch is more than just a power supply, it's a piece of history. Born in the '80s, this robust powerhouse was the first power supply ever produced by Boss. It is renowned for its durability, cost-effectiveness, and vintage charm. This compact unit is capable of powering up to seven effects, a real game-changer for the busy musician. But it doesn't stop at power supply, it doubles as a master switch, adding to its versatility and value.

Key Features:

Power supply and master switch in one
Capable of supplying power to up to seven effects
Sturdy Boss chassis, ensuring durability
Compact size, perfect for saving pedalboard space
Vintage Boss design with a touch of '80s flair
Cost-effective solution for powering your pedals

Product specs

Brand	Boss
Model	PSM-5 Power Supply & Master Switch (Black Label)
Finish	Red
Year	1982 - 1983
Made In	Japan
Categories	Controller, Expression and Volume Pedals, Pedalboards and Power Supplies
Pedal Format	Standard

FAQs

What is the main function of the Boss PSM-5 Power Supply & Master Switch?: The Boss PSM-5 serves as both a power supply and an effect loop switch. It can power up to seven 9V pedals and allows you to bypass or engage an effects loop, sending your guitar signal directly through or through connected effects.
Can the Boss PSM-5 power non-Boss pedals?: Yes, the Boss PSM-5 can power any pedal that is compatible with a 9V power supply, provided it uses the standard 2.1mm center-negative plug.
How does the Boss PSM-5 integrate into a pedalboard setup?: The PSM-5 acts as a master switch for your pedalboard, allowing you to easily toggle an entire effects loop on or off, while simultaneously supplying power to your pedals.
Is the Boss PSM-5 suitable for live performances?: Yes, the Boss PSM-5 is designed for both studio and live use, providing reliable power and an easy way to manage effects loops during performances.
What type of power adapter is recommended for the Boss PSM-5?: It is recommended to use a Boss PSA series adapter, which provides the necessary 9V power with a center-negative polarity to ensure proper functionality.

Videos

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celtusfergus

BOSS - Power Supply-Master Switch Pedal PSM-5 (PSM5)

celtusfergus

BOSS PSM-5 Power Supply & Master Switch

james Cooper

Boss PSM-5 Power Supply and Master Switch Pedal Demo

Isurus

BOSS PSM-5 Power Supply & Master Switch

Cryptic Mask Guitar

0149_BOSS PSM-5 Power Supply & Master Switch

Marián Marko testy LMSK

Boss PSM-5

YGT

Reviews

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PROS

Solves power issues effectively for multiple pedals
Offers a cool, retro look
Enables zero noise operation with several pedals connected
Allows cutting out of unused pedals from the signal path
Supports daisy-chaining power to other pedals
Provides a functional effects loop
Rugged construction withstands abuse
Can power antique ACA 12v pedals safely
Functions as a line selector, amp switcher, and kill switch
Compatible with both Boss and non-Boss 9V pedals

CONS

Outlet placement blocks indicator light and jacks
Mute mode is not user-friendly compared to modern pedals

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Boss PSM-5 Power Supply & Master Switch.

Features and functionality

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The Boss PSM-5 allows turning a pedalboard into an effects loop with a bypass switch to go directly into the amp, effectively acting like an A/B box.
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It features two jacks on top for guitar input and amp output, and side jacks for routing through pedals, providing a flexible effects loop configuration.
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Owners highlight the PSM-5's ability to easily switch pedals in and out of a loop, acting as a budget-friendly solution for this functionality.
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Use cases and applications

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The PSM-5 is essential for setups with long cable runs, offering a buffered bypass that helps maintain signal integrity.
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Ideal for players needing a quick switch between a full pedalboard and a clean signal, particularly useful in live settings.
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Utilizing the PSM-5 with a wah pedal in the loop can achieve distinctive on/off cocked wah tones, adding versatility to sound options.
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Value and pricing

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These units are often found for around $30, making them an affordable utility pedal for complex setups.
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Some owners found complete sets with connectors, daisy chain, and power supply for $25 on eBay, emphasizing the value in bundled purchases.
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Comparisons

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The PSM-5 is considered a sleeper pedal, providing similar functionality to modern switchers like the LS-2, though the latter is more versatile.
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Described as an LS-2 without a second loop, the PSM-5 can connect to a power supply and daisy chain, similar to the Boss TU-3.
Source

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4.0 out of 5

Based on 2 Reviews and 11 Ratings

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florian_tennstedt

925

about 5 years ago

80s Power Supply and FX Loop

The description says that you can power up to 7 other 9V pedals via Daisy chain. At the moment I use this as a power supply only(i can validate it powers at least 4 other pedals without any issues), but I plan on using the FX Loop for the modulation/time segment of my board. It does it's job!

Roles:

Singer Guitarist Composer

Genres:

Rock Blues garage punk blues

sandra_lee

435

almost 9 years ago

Basic

Made in the 80s basic Power Switch to power your Boss Pedals, or any pedals running on 9V, with a daisy chain. Also allows you to create an effects loop, which is the main reason I use the pedal. It's Boss, it's rugged, so it can take a lot of abuse. You can also set it into Mute mode but it's not very user friendly or combined with options when compared with more modern pedals.