MXR M239 Mini Iso-Brick

^# 29

Equipboard's ranking is determined by analyzing factors such as professional artist usage, popularity, user ratings, reviews, and more.

$99.99 to $115.00

4.5 (8)

3 Reviews

Find out who is using MXR M239 Mini Iso-Brick

18 community setups

3 wishlisted

56 saved

Page last updated Jun 22, 2026

Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated June 22, 2026.

Store

Reviews

Price

4.5 (93)

$105.99

View Deal

4.5 (14)

$105.99

View Deal

4.6 (415)

$105.99 New

$94.99 Used (Like New)

View Deal

5.0 (47)

$99.99 72 available New

$74.00 11 available Used

View Deal

4.0 (4)

$105.99

View Deal

5.0 (1)

$105.99

View Deal

4.7 (59)

$115.00

View Deal

£108.00

View Deal

Price History

Based on price data from 6 merchants for "MXR M239 Mini Iso-Brick". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

Elevate your pedalboard with the compact power of the MXR M239 Mini Iso-Brick. Designed for musicians who value both efficiency and quality, this little powerhouse delivers noise-free DC power across a broad spectrum of pedal types, proving that great things indeed come in small packages. Ideal for the minimalist guitarist or the traveling maestro, the Mini Iso-Brick is your go-to solution for a clutter-free setup without compromising on performance. With its discreet footprint, it's like having an invisible power station right at your feet – ensuring your focus stays on the music, not on managing gear.

Key Features:

Provides noise-free DC power to a wide range of pedal types.
Compact size perfect for travel boards or limited space setups.
Ensures a clean, uncluttered pedalboard setup.
Accommodates various pedal needs with ease, making it versatile for different musical styles.

Product specs

Type	Pedalboard Power Supply
Inputs	18V DC (AC adapter included)
Outputs	4 x 9V DC 300mA, 1 x 9V/18V DC 800ma
Maximum Output Current	800mA total
Isolated Output	Yes
Height	1.06"
Width	3.6"
Depth	1.5"

FAQs

Is the MXR M239 Mini Iso-Brick power supply fully isolated?: Yes, the MXR M239 Mini Iso-Brick provides fully isolated outputs to eliminate ground loop noise, ensuring a clean power supply for your pedals.
How many outputs does the MXR M239 Mini Iso-Brick have?: The MXR M239 Mini Iso-Brick features five outputs: four 9V DC outputs at 300mA each, and one switchable 9V/18V DC output at 800mA.
Does the MXR M239 Mini Iso-Brick come with power cables?: Yes, the MXR M239 Mini Iso-Brick includes a splitter cable, allowing you to connect two pedals to a single output if they require the same voltage and do not exceed the output's current rating.
Can the MXR M239 Mini Iso-Brick power high-demand pedals?: The MXR M239 Mini Iso-Brick can power high-demand pedals with its dedicated 9V/18V DC output at 800mA, accommodating various pedal requirements.
What are the dimensions of the MXR M239 Mini Iso-Brick?: The MXR M239 Mini Iso-Brick measures 3.6 inches in width, 1.5 inches in depth, and 1.06 inches in height, making it compact and pedalboard-friendly.

Videos

Add video

Sweetwater

MXR M239 Mini Iso-Brick Pedalboard Power Supply Overview

Sweetwater

MXR M239 MINI ISO-BRICK Review and quick pedalboard tour.

Bobby Hancock

Reviews

Add review

PROS

Compact and lightweight, perfect for small pedalboards
Powers high current digital pedals efficiently
Eliminates noise, even in always-on pedals
Offers generous mA output per jack for power-hungry pedals
Includes international power plug adapters for global use
Rugged design suitable for travel and mobile setups
Comes with sufficient cables for immediate setup
Provides clean power, fixing buzzing sounds in pedal chains
Features a switchable 9V/18V slot with high mA capacity
Bright LED lighting for visibility

CONS

A unit reported to malfunction upon first use
Power supply cord is too short, may require an extension
Connections can become loose, requiring rechecking
External power supply (adapter) needed
Bright on/off LED may be overly bright for some
Some users found it overpriced for the features offered
Not truly isolated, powered by an 18V wall wart

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MXR M239 Mini Iso-Brick.

Features and functionality

0 0

Running two MXR Iso-Bricks from a single wall wart is possible by utilizing one Brick’s 18V output.
Source
0 0

The 5th port on the MXR M239 Mini Iso-Brick can switch between 9V and 18V, with an indicator light showing the active voltage.
Source

User experience

0 0

Some users have reported noise issues with the MXR M239 Mini Iso-Brick, affecting the sound quality.
Source
0 0

The voltage switch is described as difficult to move, requiring a small tool or object to adjust, which reduces the risk of accidental changes.
Source

Comparisons

0 0

Cioks Schizophrenic power supply is recommended as a reliable alternative to the MXR Iso-Brick for similar requirements.
Source
0 0

The T Rex Chameleon offers five isolated outputs at 300mA, while the MXR M239 provides 18V at 800mA, demonstrating a significant power capability difference.
Source

Build quality

0 0

Concerns have been raised about the MXR Iso-Brick's longevity and reliability, with reports of it delivering inconsistent voltages.
Source

Setup and maintenance

0 0

Owners recommend securing the voltage switch with tape to prevent accidental switching from 9V to 18V, which could potentially damage pedals.
Source

Use cases and applications

0 0

Ideal for mini pedalboards or as a secondary power source, accommodating both 9V and 18V pedals effectively.
Source

Add review

4.5 out of 5

Based on 3 Reviews and 8 Ratings

5 star

4 star

3 star

2 star

1 star

nolan_locke

153

over 2 years ago

Best budget power supply!

The only thing that keeps me from giving it 5 stars is that I wish It put out more milliamps

Roles:

Singer Guitarist Bassist

Genres:

Rock Emo Pop punk

brandon_bolderoff

770

almost 6 years ago

Fits under pedal train

No complaints on this product. I found out that there's a company that makes rechargeable pedal boards and power supplies after I bought this power supply. I haven't had a problem plugging into an outlet at a gig, but a rechargeable pedal board would be nifty.

billy_cobb1

249

over 6 years ago

Hmmmmmmmm ...

NOT isolated, it's powered by an 18v wall wart. The 4 300ma 9v outputs are nyce, and the switchable 9v/18v output is as well. But it seems wayyy overpriced for an internal daisy chain power supply.

Roles:

Singer Guitarist Bassist

Genres:

Rock Pop Blues