Anyone still following Quad? I noticed most forum's last posts were
in 2003-2004, so I'm assuming some sort of surround processor for
video came out and made the topic moot or something. Pity. I have a
couple of topics that might have been interesting years ago. First,
is there any real reason why a passive quad adapter couldn't be
proportioned to the correct parameters for QS/R-matrix? And second,
isn't it possible to modify early gain-riding or variomatrix boards
to specifically enhance stereo-to-quad ambience extractors? In
particular it seems like mating the SQ "Rear Channel Vari-Blend" to
Regular Matrix would be great for that. Especially now that most
regular stereo has phasing effects to expand the apparent sound
source beyond the actual physical location of the speakers.

My questions come ten or twenty years too late I know.