MXR M238 ISO Brick Power Supply

MXR M238 Iso-Brick Power Supply

The MXR Iso-Brick is designed to solve one of the most common problems on modern pedalboards: noise.

Whether you're running a simple overdrive and tuner setup or a larger board filled with digital delays, reverbs and modulation effects, clean and reliable power is essential. The Iso-Brick provides ten fully isolated outputs, helping eliminate unwanted hum, ground loops and power-related noise while delivering stable power to a wide range of pedals.

Compact, lightweight and built for life on the road, it's one of the easiest ways to improve the reliability of your pedalboard.

Why Isolated Power Matters

Many pedalboard noise issues don't actually come from the pedals themselves.

They come from the power supply.

The Iso-Brick features ten fully isolated outputs, meaning each pedal receives its own independent power source. This helps prevent the hum, buzz and interference that can occur when multiple pedals share a common power connection.

For players running gain pedals, digital effects or more complex pedalboards, the difference can be significant.

Built For Modern Pedalboards

Not every pedal requires the same voltage or current.

That's why the Iso-Brick provides a variety of output options to suit everything from simple analogue pedals through to more demanding digital effects.

Outputs include:

• Two 9V outputs at 100mA
• Two 9V outputs at 300mA
• Two 9V outputs at 450mA
• Two 18V outputs at 250mA
• Two variable outputs adjustable from 6V–15V at 250mA

This flexibility makes it suitable for a huge range of pedalboard setups.

Vintage Voltage Sag Options

The two variable outputs offer an additional creative option.

By lowering the voltage supplied to compatible pedals, players can recreate the softer, compressed response associated with aging batteries in certain vintage fuzzes and overdrive pedals.

For tone chasers, it's a useful feature that isn't commonly found on many power supplies.

Compact and Pedalboard Friendly

Despite offering ten isolated outputs, the Iso-Brick remains remarkably compact.

The low-profile design fits easily beneath many pedalboards while keeping weight to a minimum. Power and connection status LEDs make setup simple, while the rugged metal housing is built to handle years of rehearsals, recording sessions and live performances.

 

Key Features

• Ten fully isolated power outputs
• Designed to reduce hum, noise and ground loops
• Multiple voltage and current options
• Two 18V outputs for compatible pedals
• Two variable 6V–15V outputs
• Compact pedalboard-friendly footprint
• Rugged metal construction
• Power and status indicator LEDs
• Includes MXR ECB009 18V power adapter

Who Is It For?

The MXR Iso-Brick is ideal for:

• Players building their first serious pedalboard
• Guitarists upgrading from daisy-chain power supplies
• Pedalboards using both analogue and digital effects
• Gigging musicians needing reliable, quiet power
• Players wanting a compact isolated power solution

Our Take

A quality power supply is one of the least exciting purchases you'll make for a pedalboard, but it's often one of the most important.

The MXR Iso-Brick gives players clean, reliable power in a compact format while offering enough flexibility to handle most modern pedalboard setups. If you're chasing less noise, better reliability and a cleaner signal path, it's an upgrade you'll notice every time you plug in.

Looking to buy the MXR M238 Iso-Brick Power Supply? You'll love Colemans Music. Visit us in South Melbourne or shop online with fast shipping Australia-wide. We're a proudly independent, family-owned Australian music store that knows gear and backs it up with great service.