Quote:
maybe there's some audio-quality reason that they don't want a separate ground, but instead need a polarized supply

I'll ask the same client to ask his technical bods. that question, and report back.
By the way, can you get those plugs (Have a look at Cris's post) in the US? Maybe somebody coming to the meet could smuggle me one in their luggage?
_________________________
Politics and Ideology: Not my bag