Thanks for the tip, Gary. Klaus was very keen on plugging directly into the wall, but I didn't know of the potential pitfall you mentioned.
Prepo: I've got a Forssell MDAC-2a coming from a (non-HR) Diverter. I like it very much; and should have the chance of comparing to my friend's 777 in the not-too-distant future. I think the AMR would be extremely stiff competition. Sounds like the perfect DAC.