You don't actually NEED powered USB hubs for most devices, that's one of the biggest "DJ myths" around tbh.
I can happily run 4 controllers (1x Reloop Contour IE, 1x Reloop Contour CE, 1x Kontrol F1 and 1x Korg nanoKONTROL) off a single, unpowered hub.
It's rare that units
without audio interfaces draw more than a couple of hundred miliamps each, and most USB ports can safely deliver 1-1.5A, because the official USB specification states that the MINIMUM a port should be able to provide is 500mA; in reality, most machines can provide significantly more than that.
Best practice these days seems to be: audio interface/controller with audio interface into one port, everything else into an unpowered hub on the other port. Problem solved
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