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⚡ Power your pedalboard like a pro — compact, clean, and unstoppable!
The MXR Mini Iso-Brick Power Supply is a compact, stainless steel unit delivering five fully isolated DC outputs—four at 9V/300mA and one toggleable 9V/18V at 800mA—ensuring noise-free, reliable power for analog and digital pedals. Its rugged build, LED status indicators, and included splitter cable make it the ultimate choice for professionals seeking a space-efficient, versatile, and gig-ready power solution.




| Amperage | 300 milliamps |
| Asin | B07KPM6QHT |
| Best Sellers Rank | #5,013 in Musical Instruments (See Top 100 in Musical Instruments) #60 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 (416) 4.6 out of 5 stars |
| Enclosure Material | Stainless Steel |
| Form Factor | compact |
| Input Voltage | 18 volts_of_direct_current |
| Item Dimensions | 10.79 x 4.88 x 3.5 inches |
| Item Type Name | Power Supply |
| Item Weight | 70 g |
| Manufacturer | Jim Dunlop |
| Maximum Power | 14.4 watts |
| Mfr Part Number | M239 |
| Model Number | M239 |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Output Current | 800 milliamps |
| 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 term. |
User
Small, lots of power. Well-made.
This is my third MXR power supply, but my first Mini ISO-Brick. Has lots of power. I haven't yet run into a pedal this underpowers. Fits nicely under most boards, comes with all the cables you're likely to need.
User
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.
User
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.
User
MXR means quality
Great product. Can't go wrong with MXR.
User
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.
User
Compact size
This little iso brick is the perfect size for a small pedal board. It doesn’t take up much space. It has 9v and 18v capabilities. I’ve been using it regularly for about 2 years with no issues.
User
Compact and heavy duty
The first thing that impressed me when I received this product was the small form factor. I was really looking forward for a small power supply, since I want a small pedalboard, but at the same time I wanted it to be isolated and good quality.I have been using it for months now, and I didn't have a problem. It doesn't seem to be introducing any noise whatsoever. I'm using it with 6 and sometimes 7 pedals at the same time (all analog)It's well made. It has a metal enclosure, so it looks very heavy duty.
User
Transformer lasted 3~ years
Love the 18v and extra amperage options. Gigged this power supply on the same board without removing for 3+ years, probably around 500 gigs. Transformer finally quit on me (no voltage showing on multimeter). Thankfully I had my backup OneSpot. Ordered another power supply as this one was out of the one-year warranty. Decent longevity, but consider buying a backup transformer- hopefully my brick is still good when I plug the new one in.
User
Perfect power supply
This is one of the best power supply I ever had, I already got 4 of these powering my multiple rigs, recently I made a new pedalboard and definitely was my first choice. It supplies 100% isolated power through its ports, very quiet, zero noise, reasonable price, small in size so it takes no space if placed on top of the pedalboard neither if below it. Also does not require any special tools or accessories to hang it below the pedalboard, I added a velcro and it hangs there for ages. Only down fall is the power supply jack gets easily disconnected from the unit with any movement. I solved this with a zip tie, I tied the adapter wire with a zip tie to the pedalboard thus it doesn't get affected if any movement.
User
Great product
Small size means it fits under pedalboard easily. Works really well and very easy to set up. Switches off automatically after a while too. Highly recommend if you use pedals regularly.
User
Very happy!
Low noise and so small!Greta quality!No issues! :)))
User
Producto dañado. Amazon perfecto
El producto llego dañado. Una de las entradas no funcionaba y no me percaté de ello hasta diciembre. Sin embargo Amazon ha procedido a devolverme el importe sin tener en cuenta que han transcurrido 4 meses.
User
Ottimo
Funziona benone ed con le sue dimensioni ridotte sta in qualsiasi pedaliera
Trustpilot
4 days ago
1 month ago