Hi, Jeff --
I'm being offered a Dolby 422 out of the UK for a good price. The seller is telling me that it is not the "B" unit which included Dolby S, and that an optional card needs to be purchased so that the unit will have S functionality. Now, every 422 I've ever seen has had S, including a unit I already have sourced from the UK and none of 'em says anything about a B model anywhere on it. Something stinks IMO.
I can't say with absolute certainty, but I believe S *was* optional. And, you can still upgrade an "S-less" 422 with parts from Dolby. Hang onto your wallet, though, as you're looking at over $900 to do it.
If you need S, stay away from that unit.
Hope this helps.
-- Steve
=================================================== Steve Puntolillo Sonicraft Inc. - Analog and Digital Audio Services http://www.sonicraft.com ===================================================