Confirmed: Resonessence Labs Concero HD works natively with the NVIDIA SHIELD. Probably works with other Android devices with native support for USB audio, and the SHIELD is probably compatible with other USB audio devices, but the SHIELD is all I have on me right now (my AQ DragonFly does not work with Android period in my experience whether externally powered or not).
I don't even have an amp with me to verify this is working - had to use the video RCA -> male 3.5mm adapter I had lying around and use Audacity on my computer to record from the 3.5mm line in to confirm that there was audio coming out.
All this makes for a pretty bulky setup since I need an amp too…
An extremely weird setup indeed.
Edited by tninety - 12/26/13 at 10:57pm