The MXR Iso-Brick Pro M242 is a high-capacity isolated pedalboard power supply designed to handle everything from conventional analogue pedals through to demanding modern digital effects and multi-effects processors.

Every pedal output is fully isolated, helping reduce ground-loop noise and unwanted interference while supplying clean and stable power across a wide range of voltage and current requirements.

The Iso-Brick Pro provides four 9V 300mA outputs, two 9V 500mA outputs, two switchable 9/12/18V 500mA outputs and one dedicated 9V 1.5A high-current output, making it particularly useful for larger mixed analogue/digital pedalboards.

This is a Pre-Owned example.

The DC pedal power cables are missing and are not included.

AT A GLANCE

Detail	Specification
Brand	MXR
Model	Iso-Brick Pro
Model Number	M242
Type	Isolated Pedalboard Power Supply
Isolated Pedal Outputs	9
High-Current Output	9V / 1.5A
Variable Voltage Outputs	2 x 9/12/18V
Maximum Output	42W
Input	Universal IEC Mains
Condition	Pre-Owned
Important Note	DC Pedal Power Cables Missing

PRE-OWNED CONDITION REPORT

This is a Pre-Owned MXR Iso-Brick Pro M242.

A specific cosmetic condition grade has not been supplied, so the unit has not been described as Excellent, Very Good or Good.

Please study the photographs carefully for the exact cosmetic condition of this individual power supply.

Important: the DC pedal power cables are missing and are not included.

Replacement pedal power cables will therefore be required before connecting effects pedals to the individual DC outputs.

IMPORTANT – MISSING POWER CABLES

The DC output cables normally used to connect pedals to the Iso-Brick Pro are not included.

This means the buyer will need suitable compatible replacement power cables before using the unit to power pedals.

The Iso-Brick Pro itself uses a standard IEC mains connection, so there is no proprietary external wall-wart power supply required for the main unit.

KEY FEATURES

• MXR Iso-Brick Pro

• Model M242

• Fully isolated pedalboard power supply

• Nine isolated pedal outputs

• 4 x 9V DC / 300mA outputs

• 2 x 9V DC / 500mA outputs

• 2 x switchable 9V / 12V / 18V DC outputs at 500mA

• 1 x dedicated 9V DC / 1.5A high-current output

• 1 x 18V DC / 2A link output

• 42W maximum output

• Universal 100–240V mains input

• Standard IEC power connection

• Suitable for analogue and high-current digital pedals

• Designed to reduce ground-loop noise

• Compact pedalboard-friendly enclosure

• Pre-Owned

• DC pedal power cables not included

WHY YOU’LL LOVE IT

The Iso-Brick Pro is designed for pedalboards that have outgrown smaller low-current power supplies.

Its combination of conventional 9V outputs, selectable-voltage sockets and a dedicated 1.5A high-current output means it can handle a much wider range of pedals from one compact unit.

That makes it especially useful for players combining traditional analogue stompboxes with modern processors and high-current digital effects.

DETAILED FEATURES & BENEFITS

Fully Isolated Outputs

Every pedal output is electrically isolated.

This helps prevent ground loops and unwanted noise passing between pedals, making the Iso-Brick Pro particularly useful on larger and more complex pedalboards.

Four 9V / 300mA Outputs

Four outputs provide:

9V DC at up to 300mA each

These are suitable for a wide range of conventional analogue and digital pedals.

Two 9V / 500mA Outputs

Two additional outputs provide:

9V DC at up to 500mA each

These are useful for more demanding digital effects and multi-function pedals.

Two Switchable 9V / 12V / 18V Outputs

Two outputs can individually be switched between:

• 9V

• 12V

• 18V

Each can supply up to 500mA.

This makes the Iso-Brick Pro particularly flexible for pedals designed to operate at higher voltages.

Always check the voltage requirements of an individual pedal before connecting it.

Dedicated 9V / 1.5A Output

A dedicated high-current output provides:

9V DC at up to 1.5A

This is designed for demanding digital equipment and larger effects processors.

MXR specifically positions this output for high-current units such as modern multi-effects and amp-processing pedals.

18V / 2A Link Output

A dedicated 18V DC / 2A link output allows the Iso-Brick Pro to feed another compatible MXR power supply.

This makes it possible to expand a larger pedalboard without adding another mains connection.

Universal IEC Input

The Iso-Brick Pro accepts:

100–240V AC, 50/60Hz

This universal input makes it suitable for use in different regions when paired with the appropriate IEC mains cable.

42W Maximum Output

The supply provides up to 42 watts maximum output, giving it substantial capacity for a modern pedalboard.

WHO IS IT FOR?

The MXR Iso-Brick Pro is particularly well suited to:

• Large pedalboards

• Professional guitarists

• Bass pedalboards

• Digital multi-effects users

• High-current pedal users

• Touring musicians

• Studio pedalboards

• Players mixing 9V, 12V and 18V effects

• Players wanting isolated power

PLAYING STYLES & APPLICATIONS

The Iso-Brick Pro is useful for virtually any pedalboard setup, including:

• Guitar pedalboards

• Bass pedalboards

• Studio effects boards

• Live rigs

• Multi-effects setups

• Analogue pedalboards

• Digital pedalboards

• Mixed analogue and digital systems

• High-current processors

HOW IT COMPARES

Iso-Brick Pro vs Standard Daisy Chain

A daisy-chain supply shares the same electrical ground between multiple pedals.

The Iso-Brick Pro uses fully isolated outputs, helping reduce noise and ground-loop problems.

Iso-Brick Pro vs Original Iso-Brick

The Pro adds significantly more high-current capability, including a dedicated 9V / 1.5A output, while retaining multiple isolated conventional outputs.

Iso-Brick Pro vs Small Power Supply

Compact supplies may be sufficient for a few analogue pedals.

The Iso-Brick Pro is better suited to larger boards containing high-current digital pedals and equipment requiring 12V or 18V operation.

PRODUCT SPECIFICATIONS

Specification	Details
Product Type	Pedalboard Power Supply
Brand	MXR
Model	Iso-Brick Pro
Model Number	M242
Isolation	Fully Isolated Outputs
9V / 300mA Outputs	4
9V / 500mA Outputs	2
Switchable Outputs	2 x 9V / 12V / 18V, 500mA
High-Current Output	1 x 9V / 1.5A
Link Output	1 x 18V / 2A
Maximum Output	42W
Input	100–240V AC, 50/60Hz, 1.5A
Mains Connection	IEC
Width	235mm
Depth	88mm
Height	37mm
Approx. Weight	0.84kg
Condition	Pre-Owned
DC Pedal Power Cables	Not Included

POWER REQUIREMENTS

The MXR Iso-Brick Pro operates directly from:

100–240V AC, 50/60Hz via IEC mains input

No proprietary external adapter is required for the main power supply.

The DC cables used to connect individual pedals are missing and are not included.

Compatible replacement cables will be required before powering pedals.

FAIR DEAL MUSIC EXPERT VERDICT ★★★★★

Best suited for: Players building medium-to-large pedalboards that combine conventional analogue pedals with demanding digital effects and processors.

Customers usually upgrade from: Daisy-chain adapters, small isolated supplies and lower-current pedalboard power units.

Most commonly paired with: Multi-effects processors, digital delays, reverbs, modulation pedals, analogue drives and other large pedalboard systems.

Our tip: Before connecting any pedal, check both its required voltage and polarity. The selectable 9/12/18V sockets make the Iso-Brick Pro very flexible, but supplying the wrong voltage can damage a pedal.

Showroom feedback: The 1.5A high-current output is what makes the Pro particularly useful on a modern board. It can handle equipment that would overwhelm many traditional pedal power supplies while still providing plenty of isolated outputs for smaller pedals.

WHY BUY PRE-OWNED FROM FAIR DEAL MUSIC?

Buying a Pre-Owned MXR Iso-Brick Pro can offer excellent value for players looking to upgrade to a professional isolated pedalboard power system.

This example is supplied without the DC pedal power cables, so replacement cables will be required.

WHY BUY FROM FAIR DEAL MUSIC?

When you buy from Fair Deal Music, you're choosing one of the UK's most established, independent family run music retailers since 1987.

Fair Deal Music combines a large Birmingham showroom with nationwide ecommerce and knowledgeable musician-led advice.

Customers benefit from:

• Family-run independent retailer established in 1987

• Birmingham's largest independent music store

• 6,000+ Trustpilot reviews

• Knowledgeable musician-led advice

• Extensive experience with pedalboard equipment

• Large Birmingham showroom

• Secure online ordering

• Fast UK delivery

• Friendly customer support

• Part-exchange and trade-in service

TRADE IN. TRADE UP. SAVE MORE.

Your current pedals, power supplies, guitar or other musical equipment could help towards the cost of this MXR Iso-Brick Pro.

Fair Deal Music buys and part-exchanges effects pedals, pedalboard accessories, guitars, basses, amplifiers, keyboards and a wide range of musical equipment.

Contact our team for a no-obligation valuation.

PART EXCHANGE / TRADE-IN

If you already own pedals or other musical equipment you are considering replacing, Fair Deal Music can assess them for part exchange.

Trading in can remove the inconvenience of selling privately while allowing the value of your existing gear to go directly towards your next purchase.

FREQUENTLY ASKED QUESTIONS

Is this MXR Iso-Brick Pro used?

Yes. This is a Pre-Owned MXR Iso-Brick Pro M242.

How many isolated pedal outputs does it have?

Nine isolated pedal outputs.

How many 9V / 300mA outputs are there?

Four.

How many 9V / 500mA outputs are there?

Two.

Does it have switchable voltage outputs?

Yes. Two outputs can each be switched between 9V, 12V and 18V, with up to 500mA available.

Does it have a high-current output?

Yes. It has a dedicated 9V / 1.5A output.

Can it power high-current digital pedals?

Yes, provided the pedal’s voltage, polarity and current requirements are compatible.

What is the 18V link output for?

It can power a compatible secondary MXR power supply for expanding a larger pedalboard setup.

Are the outputs isolated?

Yes.

Does it use an external wall-wart adapter?

No. It uses a standard IEC mains input.

What mains voltage does it accept?

100–240V AC, 50/60Hz.

Are the pedal power cables included?

No. The DC pedal power cables are missing and are not included.

Will I need replacement cables?

Yes. Suitable compatible DC pedal cables will be required before connecting pedals.

What condition is it in?

A specific cosmetic condition grade has not been supplied.

Can I part-exchange another pedal power supply against it?

Yes. Fair Deal Music considers pedalboard equipment and a wide range of other musical gear for part exchange.