I have a new PC and use Windows 7 Pro 64 Bit.
(Intel Core i5-4590; Asus B85M-G; 2x 8 GB HyperX-Savage CL9 DDR3 1600; Sharkoon WPM500 Bronze)
The PC has 6 USB ports.
When I connect the BS2 to one of the USB ports,
it often happens that Windows writes, "Unkown device".
The BS2 itself can be turned on and used without problems.
However, I need it in Windows to work in my DAW, but as said it almost never gets recognized.)
When I use the BS2 power supply and connect the BS2 with my PC,
it seems to work without problems.
(I haven't tested it so many times, but it seems it always worked.)
I also tried a USB to 2x USB A adapter.
The one jack was connected with my PC and the other one to a USB power supply.
It seems it didn't work either...
Any idea what the problem could be?
What experience did you make by using the BS2 with USB only?