Thank you for helping me discover this alternative ADuM board.
Go to eBay and copy/paste search this in bold: Teralink ADuM4160 USB Isolator board.
Or use this link (same seller):
That board is made for audio. It uses a linear regulator to supply power to the downstream side of the ADuM chip and downstream peripherals (that you won't use with the Schiit gen 2 USB board). It's also cheaper than the others I've seen. If you aren't going to use an Ultravox, this is probably the next best one (IMO). The jumpers should be set for full speed.
Go to Jameco.com and search for 170245. That's a 12v 1 amp linear regulated wall wart. I'm not sure about the plug configuration but the rest of it is proper. I have one of those and a similar 5v version on order that won't ship until the 5v is available again in late October. There is no option for the supply connectors and they may need modifying. You might consider putting a ferrite bead close to the connector if there isn't one on it from the manufacturer (RFI filtering for sensitive equipment).
Don't forget to get one of the little USB gender adapters I mentioned in my last post (the one you quoted). Use a good quality USB cable, especially not a cheap utility grade cable. Preferably one specifically for audio USB. Go to Amazon and search Pangea USB PCOCC. Those look like a great value.
I have to again say that I take no responsibility for you trying anything I've mentioned. Computer audio systems usually have unique component synergies and some will undoubtedly behave differently. Please tell us how it works for you.
Very good, thank you. I will report my findings. FYI, I am using a quality Audioquest USB cable. One more question... is there any reason for me to believe that such a set-up would not work in Mac OS X on a Macbook Pro?