Skip to content
Based in Wales Conwy • North Wales
Sell your guitar — fair prices paid 4.9/5 service rating Need help? +44 (0)1492 588279
Sell your guitar 4.9/5 Tap to call
Contact Returns Shipping Guitar Repairs Privacy Policy Sell Your Guitar Visit Our Showroom
MXR® MINI ISO-BRICK™ POWER SUPPLY M239 - Guitar Warehouse
SKU M239

MXR® MINI ISO-BRICK™ POWER SUPPLY M239

Sold out
£115.00 - £115.00
£115.00
£115.00 - £115.00
£115.00
Availability:
Out of stock

Whether you need a space-saving solution for your downsized travel board or you just need to power a small, carefully curated selection of tried-and-true staples, this little box has what you need—all while taking up less space than a candy bar.

 

THE LONG STORY

The Mini Iso-Brick Power Supply supplies quiet, noise-free DC power to wide range of pedal types while taking up less space than a candy bar. Whether you need a space-saving solution for your downsized travel board or you just need to power a small, carefully curated selection of tried-and-true staples, this little box has what you need.

First, let’s talk outputs. The Mini Iso-Brick Power Supply has five, and each is fully isolated to eliminate obnoxious, gig-ending ground loop noise. Four of the outputs supply 9 volts of power at 300mA, while a fifth can be set to provide either 9 volts or 18 volts at 800mA depending on your needs. With a generous amount of current on tap and the ability to handle both negative and positive grounds, these outputs will accommodate almost any pedal, analog or digital.

And don’t let the five outputs restrict you—if you need to add an extra pedal, the Mini Iso-Brick Power Supply has you covered. It comes with a splitter cable that can be used to connect two pedals to a single output, provided they require the same voltage and you don’t exceed the output’s current rating. You can do this with all of the outputs simultaneously—just purchase the extra cables to do so.

Finally, troubleshooting can be a hassle on dark stages, so the Mini Iso-Brick Power Supply comes equipped with LEDs to let you know that all your connections are solid. Combine that with a lightweight housing that's built like a tank, and you can step on stage with confidence that your pedalboard will stay powered from gig to gig.

All items are professionally packed for safe transit

  • Tracked UK delivery options available at checkout
  • Orders placed before 1pm (Mon–Fri) are usually dispatched the same working day
  • Guitars may require 1–2 additional working days for final setup

UK Delivery:
Standard and next working day options available.
Some remote areas may incur an additional charge — we’ll always contact you before dispatch.

International Shipping:
Worldwide shipping available — please contact us for a quote before ordering.

For full delivery options, setup information, and international pricing,
👉 View our Shipping page: https://www.guitarwarehouse.co.uk/pages/shipping

Online Orders – 14-Day Returns (Distance Selling Regulations)
Customers who make a purchase online or via distance selling are entitled to return an item within 14 days of receipt, in accordance with the Consumer Contracts Regulations. Items must be in unused condition and returned with all original packaging and documentation.

  • Refunds will be issued to the original payment method once the item has been inspected and confirmed to be in resalable condition.
  • Return shipping is the responsibility of the customer unless the item is faulty or supplied in error.

In-Store Purchases
Items purchased in-store are not eligible for a refund. However, we do offer exchange or a store credit (gift card) for in-store purchases returned within 14 days, provided they are in their original condition with proof of purchase.

Exclusions
Please note that custom orders, modified items, B-stock, clearance items, and goods obtained through part exchange are non-refundable, unless faulty.

Partial Refunds
There are certain situations where only partial refunds may be granted, at our discretion. These include, but are not limited to:

  • Guitars returned with protective plastic film removed from pickguards or pickups.
  • Items showing signs of use or handling.
  • Missing or damaged original packaging, tags, or accessories.

All returns are inspected upon receipt. If a return does not meet the conditions above, we reserve the right to refuse it or issue a partial refund.

New Items — 12-Month Warranty

All new products sold by Guitar Warehouse are covered by a 12-month manufacturer’s warranty, in line with UK consumer law.

This warranty covers manufacturing defects and faults that occur under normal use. In the event of an issue, we will assist with the warranty process and liaise with the manufacturer or authorised service centre where required.

This warranty does not cover:

  • Normal wear and tear
  • Damage caused by misuse, neglect, accident, or unauthorised repair/modification
  • Consumable items (such as strings, valves, batteries, etc.)

Pre-Owned Items — 3-Month Warranty

All pre-owned items are supplied with a 3-month Guitar Warehouse warranty.

This covers faults that arise from normal use and were not apparent at the time of sale. All pre-owned instruments and equipment are checked, tested, and set up prior to sale to ensure they are fully functional.

This warranty does not cover:

  • Cosmetic wear consistent with age or prior use
  • Damage caused by misuse, neglect, accident, or unauthorised repair/modification
  • Consumable items (strings, valves, batteries, etc.)

Important Notes

  • Proof of purchase is required for all warranty claims.
  • Warranty claims must be reported as soon as a fault is identified.
  • Warranty is non-transferable and applies to the original purchaser only.
  • Your statutory rights under UK consumer law are not affected.

For warranty claims on distance sales, customers are responsible for safely returning the item to us for inspection. Where a valid warranty fault is confirmed, we will cover the cost of returning the item to the customer.

If you have any questions about warranty coverage, please contact us — we’re always happy to help.