I had not heard of the 'S' designation and it was not used when I purchased. Read your note (saying, <2, less than 2) so not being aware of the 'S', I went to check mine. The included sheet read "Internal impedance 2 Ohms." No biggy - just posting for others who may have had my uncertainty. Only after looking did I see the 'S' on the box and handwritten s/n above 2400. Embarrassed to say its not mounted yet, waiting for a new tonearm. Wanted an Orpheus L, but those are gone. Bob Clarke (Profundo) described the new Phoenix (I believe it is the 3rd version) as kind of a sleeper, better than the 'L' - I trust his ears, so... Fwiw, I understand there is a new Transfiguration flagship model on the horizon.
I'm also behind on cleaning records.