Just a tip that may help some. I called Steinberg yesterday (returned my call very promptly).
My question was: Can I power the UR22 with a 115V USB converter instead of the USB connection on my PC?
Seinberg’s reply: He called back some time later. He had never had that question before. He said the UR22 unit can be plugged it into the white converter used to charge an Appl iphone. The converter he recommended was the the standard Appl 115V/USB charger with an output of 5V 1A.
He mentioned the converter for the ipad had different specs 5V 2A. He recommended the 1A would be sufficient and wasn’t sure of the 2A converter.
The reason I asked this question was, I would like to use the phantom power to power my condenser mic and then run it through to my PA system. This allows me to have my mic and my acoustic guitar running through my PA for jam sessions.