I'd looked into something like this, since I have a lot of MIDI modules and it would be more convenient to run them off fewer power supplies.

However, I wasn't able to find a PS capable of the required current. I looked at units like the Strymon Zuma High Current PS (designed for guitar pedals), but it tops out at 500mA per output.

Whereas the rated current draw on a lot of MIDI modules is higher (typically 600-800 mA). So I didn't bother going that route since I don't want to risk issues with gear from not providing the appropriate current.

Thanks for the reply!

I'm looking at using something like an Anker PowerPort 5 which is basically a USB wall charger supporting 5V/2.4A per-port.

I would then connect the Roland equipment using a USB DC 5V to 9V cable (making sure the polarity is correct).

I could also power other small equipment like USB DACs which require 12V/1A using different USB voltage step-up cables.

I would just get a power board and a bunch of small 9v inverter PSUs. I have non-roland equipment with quite different voltage so it's much easier this way for me.

kolderman wrote on 2022-09-21, 20:24:

I would just get a power board and a bunch of small 9v inverter PSUs. I have non-roland equipment with quite different voltage so it's much easier this way for me.

Sorry, what's a power board?

sofakng wrote on 2022-09-21, 20:16:

Thanks for the reply! […]
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Thanks for the reply!

I'm looking at using something like an Anker PowerPort 5 which is basically a USB wall charger supporting 5V/2.4A per-port.

I would then connect the Roland equipment using a USB DC 5V to 9V cable (making sure the polarity is correct).

I could also power other small equipment like USB DACs which require 12V/1A using different USB voltage step-up cables.

Instead of doing 5v DC to 9v DC upconversion, why not leverage USB PD ( power delivery) and get

- A good quality high power multi-port USB PD power adapter that supports 9V output.
- Something like these https://www.amazon.com/JacobsParts-Voltage-Tr … C/dp/B08NFLDYX7 ( to tell a port the PSU to output 9V)
- Some solderable barrel jacks and wire

A bit of DYI and you're done.

darry wrote on 2022-09-21, 20:31:

- A good quality high power multi-port USB PD power adapter that supports 9V output.

Thanks! I've used those adapters before for many other projects (including a bench power supply) but I don't think many multi-port USB PD power adapters exist (and if so they are probably very expensive?)

(I'm using an Anker Nano II 100W USB-PD charger that has two USB-C PD ports and that currently costs $86)

sofakng wrote on 2022-09-21, 20:35:

darry wrote on 2022-09-21, 20:31:

- A good quality high power multi-port USB PD power adapter that supports 9V output.

Thanks! I've used those adapters before for many other projects (including a bench power supply) but I don't think many multi-port USB PD power adapters exist (and if so they are probably very expensive?)

(I'm using an Anker Nano II 100W USB-PD charger that has two USB-C PD ports and that currently costs $86)

I've seen some for under 50 CAN$ with 2 x 9V capable PD ports on Amazon

sofakng wrote on 2022-09-21, 20:29:

kolderman wrote on 2022-09-21, 20:24:

I would just get a power board and a bunch of small 9v inverter PSUs. I have non-roland equipment with quite different voltage so it's much easier this way for me.

Sorry, what's a power board?

Australian word for what Americans might call a power strip? One of these:
https://en.wikipedia.org/wiki/Power_strip