MEM is currently performing upgrades to older power supply units in Monorocket’s eurorack cases including Mission 9, Geminis, and 12U.

This work is endorsed by Monorocket’s Steve Rightnour.

With this PSU upgrade, your case will be powered with Monorocket’s current configuration of 3500mA, +/-12V.  If you need +5V installed to your case, please read on below.

How it works: 

Get in touch with MEM at and let me know that you will be shipping your case. Include whether or not you want the new distro board replacement, and the size of your case.  As soon as I receive it, turnaround time is about 10 days. Cases ship back out on Fridays or Saturdays of the week after they are received.


5V options:

You can replace your current distro boards with the new Monorocket distro boards. These supply +5V on all of your rows, and you will be adding the cost of these boards and installation to your upgrade. Or, you can keep your current distro boards and get a +5V adapter of your choice. (Erthenvar’s Free Lunch, Make Noise +5 adapter, Mutable Instruments Volts are all reliable choices). Your current distro boards will be left intact.



For domestic (US) shipments, I recommend FedEx.  Pack your case with extra padding and peanuts! A fitted box inside of a full six inches of packing peanuts in another large box is not overkill. Also to avoid any pressure induced damage that may occur to the mounting rails, hinges, etc, I suggest you pack the inside with newspaper, or even put clear tape around the edge where the hinges and keepers are mounted. If you want to keep your sliding nuts from moving around, put a screw on the last nut.

If you are outside of the US, check for your best courier options and include in your email where you are shipping your case from.



$160 for 6U / 9U standard upgrade without new bus boards, including return shipping to US. 
$280 for 9U upgrade with new bus boards, including return shipping to US. 

For Canada, Alaska, and elsewhere, shipping is upwards of an additional $65-130 depending on the courier. Your shipping rates will vary.


These are full upgrades only, and we do not perform “repairs” to your current PSU issues. For problems on your existing power supply, try searching or inquiring at the Monorocket support forum.