You will probably still need true confirmation from Paradigm, but from Home Theatre Magazine's December, 2008 article "Paradigm Reference Signature S8 Speaker System"......
"Paradigm is notable among speaker manufacturers for making so many of its speakers’ components in-house. On these speakers, only the cabinets are outsourced from China."
Steve
Yep that's the reference everyone see.
Just from hearsay, this happened to the Studio line when they moved from V4 to V5. V4 was a rectangular vinyl clad box. V5 is rounded, real wood veneer, lacquered. Rumors has it that in order to contain costs (there was no significant price increase from V4 to 5) they outsourced the new cabinets (which need serious labor to make).
Anyway, seeing both of them in person, the V5 cabinets are better made, better looking, better braced and less resonant. Any bass boomines present in v4 is now gone.
OTOH the Signature line was always made with real wood veneer etc, and the price was always high - not sure if they outsourced those too.
And as a side note - if you study period furniture, it was only the kings of France that could afford sending their stuff to get lacquered in China. Anyone else had to do with local craftsmen and shellac. (and I'm not kidding).
Nap.