An RME uses an off-board power supply. You can use a cheap wallwart or upgrade to something better. I run my RME off a 12v Li battery, which is orders of magnitude better than any power on the planet. It made a dramatic difference in sound.
Whether it sound better than the custard I don’t know, but it sounds a lot better than it did with a wallwart.
Whether it sound better than the custard I don’t know, but it sounds a lot better than it did with a wallwart.