It's a non-powered hub...
a basic one from Amazon.
I do not have both systems on at the same time, but the PS Classic has a LED that is orange when powered but not "on" and green when "on". So I didn't know if that would matter. Both power on and play individually. Now I have not really spent any much time playing them (no more than 5 min at a time) since I set it up this way because of lack of time and because of the USB setup.
I was just wondering if a slit power source would cause the system to work different - i.e. Lag, Harder on the internal components, etc.