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MXR M239 MINI ISO-Brick power supply. 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 Mini Iso-Brick Power Supply has five outputs, 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.

Includes: 5x DC cables and 1x Y-splitter cable to allow two 9V pedals to be connected to the 18V output. Also includes 18V 2000mA mains power adapter.

Features: 5 isolated outputs (max output 2000mA) - 4x 9V/300mA & 1x switchable 9V/18V 800mA

  • 5 isolated outputs (max output 2000mA)
  • -4x 9V/300mA
  • -1x switchable 9V/18V 800mA
  • Includes:
  • -5x DC cables
  • -1x Y-splitter cable to allow two 9V pedals to be connected to the 18V output
  • -18V 2000mA mains power adapter



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GAK.CO.UK LTD is registered in England and Wales 04578270. Registered office: 30 - 34 North Street Hailsham East Sussex BN27 1DW GAK.CO.UK LTD acts as a credit broker and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. GAK.CO.UK LTD is an appointed representative of The Guitar Amp and Keyboard Centre Limited which is authorised and regulated by the Financial Conduct Authority. GAK.CO.UK LTD FCA registration number is 731400. The Guitar Amp and Keyboard Centre Limited FCA registration number is 684977. Credit provided subject to age and status

V12 Retail Finance Limited. Registered in England and Wales 4585692. Registered office: One Arleston Way, Solihull, B90 4LH. Authorised and regulated by the Financial Conduct Authority. Our FCA reference number is 679653.

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Customer reviews

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  • colin challinor


    This is absolutely ideal for my needs, can't believe how small it is but still has more than enough outputs, works really well.

  • Mr Dafydd Griffiths


    An upgrade to my dc brick. ISO for small pedal board. No more hum!

  • Harry Jewell


    Next day delivery! Great service

  • john


    Item exactly as described.For my pedal board it is the perfect solution and exceptionally well made and compact.

  • customer


    This is just a brilliant little power supply. Small enough to fit properly beneath even the smaller Pedaltrain boards, and pretty much versatile enough most people’s needs. Does exactly what the TRex Fuel Tank Jr does but is less than a third of the size and weight. I’ve have an MXR Power Brick for two years with no issues with reliability, so I assume this will be equally decent.

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Finance provided by PayPal Credit. Terms and conditions apply. Credit subject to status. UK residents only. GAK.CO.UK Ltd acts as a broker and offers finance from a restricted range of finance providers. PayPal Credit is a trading name of PayPal (Europe) S.a.r.l. et Cie, S.C.A., 22-24 Boulevard Royal L-2449, Luxembourg.

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