

⚡ Power your pedalboard like a pro — compact, clean, and unstoppable.
The MXR Mini Iso-Brick is a compact, fully isolated power supply designed for guitar effects pedals. It features five outputs—four 9V outputs delivering 300mA each, plus one toggleable 9V/18V output with 800mA—providing versatile power for analog and digital pedals alike. Its included splitter cable allows daisy-chaining pedals on a single output, while LED indicators and a rugged stainless steel enclosure ensure reliable, noise-free performance for professional gigging musicians.















| ASIN | B07KPM6QHT |
| Amperage | 300 Milliamps |
| Best Sellers Rank | #3,212 in Musical Instruments ( See Top 100 in Musical Instruments ) #31 in Guitar & Bass Pedal Boards & Cases |
| Brand | MXR |
| Color | black |
| Connector Type Used on Cable | 20+4 Pin ATX |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,376) |
| Enclosure Material | Stainless Steel |
| Form Factor | compact |
| Input Voltage | 18 Volts (DC) |
| Item Dimensions | 10.79 x 4.88 x 3.5 inches |
| Item Type Name | Power Supply |
| Item Weight | 70 Grams |
| Manufacturer | Jim Dunlop |
| Mfr Part Number | M239 |
| Model Number | M239 |
| Output Current | 800 Amps |
| Output Wattage | 14.4 Watts |
| Specification Met | FCC |
| UPC | 710137108165 |
| Warranty Description | Dunlop manufacturing, inc. Will repair or replace, at its discretion, defective workmanship or materials on all new dunlop electronics directly or through the selling dealer or authorized service technician, for one year from the date of purchase, at no cost to the original purchaser. Repair or replacement parts installed will then be warrantied for the unexpired portion of the original warranty t… |
H**N
Quality and Clean
Build quality is amazing as always. Design is clean and functional. The 18v power supply is pretty chunky in size so be prepared to make room for it. Great product overall.
B**N
The only way to beat this MXR Mini ISO is to spend 250% more!
For the power that it offers and its size and construction you cannot spend your money any better than this. And if you can find it on sale, even better. Because of the 9 V outlets 350 mA power reserves along with the 18 V having 800 mA of power, you have all the power you need! In my case, I have three 18 V pedals two of which needed 300 mA each, with the other requiring 100 mA. It runs them flawlessly and quietly using a 3 way power cable. That cable, I had to buy separately. It comes with most of the cables you need, including a splitter to run two pedals from a single outlet. Because of the 350 mA of power coming from a single 9 V outlet, you can even daisy chain pedals together from a single outlet as long as you calculate the number of milliamps your pedals need. I only daisy chain my analog pedals. The digital ones I tend to isolate. The only other power supply, I would even consider, is the Cioks DC7. Check it out if you need other voltages. Each power outlet can be configured for four different voltages, and it has tons of reserve power. However, it costs over twice as much as the MXR, but you will not be disappointed.
D**N
Dependable Power, Clear Sound, and NO HUM! :)
I love the MXR Brick! I am a guitar effects hobbyist who also has fun TRYING to play ukulele, lap dulcimer, and even digital piano ; plus, I enjoy listening to recorded music. For quite some time over the past few years, I had been irritated by a nagging hum and distortion throughout the entire amp system. Quite by accident, I discovered that the entry-level, daisy-chain 110-volt adapter for my guitar effects pedals was causing much of the problem. Often the hum was loud enough to drown out or distort the music Well, this year, upon receiving some Christmas money, I added some of my own and ordered an MXR "DC Brick" Power Supply, Model 237. In an instant. the hum disappeared, and the advanced clarity of my monitor speakers returned. Even my lousy guitar playing sounded better! // This outstanding MXR power supply -- with its reasonable price; compact, solid-state build; and multiple 9V and 18 V power outlets -- was the perfect answer to my noisy, grounding/feedback hum problem. It may be yours, too!
D**H
Light weight, well made, great brand
Plenty of power and you can daisy chain another one into the 18v slot if you need more slots. Super compact and fits under my board with ease. I am a big fan of Dunlop/MXR stuff; it’s durable and dependable. I’d say they are a working musicians dream. There are cheaper options but there isn’t a thing I trust more in this price range.
P**R
It's MXR you can't go wrong.
Bought this power supply to run the pedal board I'm in the process of building. Only running 3 pedals on it now but it works like a champ. It's also smaller than I anticipated which is cool, less pedal board real estate used which is always an issue. You all know what I mean.
A**Z
Favorite power supply
Great power supply for small to medium boards. Value of this is insane and is a great power supply for the average hobbyist .
D**O
Good price & best for small pedal boards
It is small and has four 300mA connections and one 500mA connection. An excellent choice for small pedalboards.
S**R
Awesome Value and Great Ground Loop Noise Reduction!
I've looked at a lot of the popular power supplies on the market like some of the voodoo labs and Truetone 1spot bricks and this one seemed to have the right amount of outputs for the price. I'm surprised that these don't seem to be more popular. I had some noise before I bought this and now everything is quite and absolutely no noise (still a little pickup hum, but my noise gate squashes that completely; no power noise at all). The LEDs are very bright but I guess that is better than not bright enough. I have a Pedaltrain Pro and the cables were long enough that I was able to string my Time Machine nearly all the way to the opposite corner of the board. I was a little concerned about the "sag" outputs but it seems that you can just set them to 9V and they act as a normal 9V output. Also another huge point that I didn't really see anyone talking about on the internet: it seems to power the Digitech Whammy 5 flawlessly. NOTE: this is the version 5 that is 9VDC from the factory (not the AC older versions). So the original Whammy power brick and input say 1300mA, but the Whammy manual says that it consumes <265mA. I think the adapter is a generic Harmon adapter for many things and so they just want you to use what they already make which happens to be 1300mA max. The pedal will only pull the required amperage from the brick at 9V, which again is <265mA and I'm pretty confident that value is accurate, otherwise it wouldn't be in the manual. To be safe I put it on the 450mA output and it works great! Pedals I'm powering: Korg Pitch Black Tuner Digitech Whammy V (DC) Visual Sound Double Trouble Visual Sound Comp 66 MXR Smart Gate Vox Time Machine Switch Doctor generic amp footswitch with 9VDC powered LEDs
K**O
I like it,it works very well.
M**E
Cabe en mi pedalboard es muy compacto no mete nada de ruido excelente producto
B**X
Cette 'Brick' évite la multiplicité d'alimentations et/ou le recours aux cordons pieuvres. Et fonctionne parfaitement!
B**D
This is a great unit at a good price. This is in fact my third one. I was using two with a substancial pedal board and without thinking, sold them with all of my pedals and started using a multieffects unit. I have since sold my multieffects unit and have gone back to a series of pedals, thus needing the unit again. It is not noisy and works like it should. And the price is right.
K**Y
Ho acquistato l’alimentatore in sostituzione di uno economico e sono spariti tutti i rumori di massa. Davvero ottimo
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