The sound I was hearing with everything I threw at the LAu was utterly seductive, and even though there was SE noise w/ sensitive headphones in my particular environment, they sounded really, really good otherwise. Because of this I acquired a SE -> XLR adapter. Problem solved.
But Dr. Cavalli is not one to simply accept "good enough" solutions in my experience. He said the production units will have a dedicated SE low impedance jack. Awesome! So yeah, really looking forward to seeing if SE mode is now quieter with my more sensitive stuff.
This amp is looking pretty impressive so far! Please keep us posted on your experiences.