Update: I was messing around with it - I am a fool, I know, but I can’t resist it. I noticed that powering it via usb only makes the DSP unable to load amp models, or load anything in the second slot. The REV-X Reverb works like a charm though - the Chanel Strip too. I also tried switching on the Phantoms, and the device still worked - no power down. Strange thing.
I wonder whether the only thing that requires the power is the DSP Chip. It would make sense - UR242 has DSP effects and it needs a PSU to work, but UR22 hasn’t, and it operates via usb power.
I was also wondering that, if the DSP is the power consumer, whether a firmware update would allow the users to switch it off, and use it as a usb-powered unit via a USB3.0 Type A Port, without the insert fx’s. This would be nice! But I’m just speculating here, I don’t know the ins and outs of the thing. Anyone who knows here?