Michaeljbrown, the unit I have was upgraded from the factory with 24/192 DAC's, DPLII, DTS Neo6/movie/music, DPLII movie/music, DTS EX processing, 8ch input and, also, direct pass through for ALL 2 channel analog inputs, for sonic purity!
Basically, the unit has all new digital processing, retaining all the original preamp section, analog volume control, etc. This upgraded piece was never released to the public/manufactured, and is rare and hard to find.
It's now nearly dead silent as far as background noise goes. The old ACT 3 had 90db signal/noise. This one has over 100db signal to noise! It's much more detailed than before, and more refined and sweet sounding, like the Krell HTS piece actually, but MUCH more dynamic!!!
I've not come across another processor as dynamic as these ACT 3's really. That and the clarity of sound makes for a superior process/preamp! Ofcourse mine can do SACD/DVDA from the 8 channel in or any of the 2 channel analog in's for 2 channel SACD/DVDA or other analog sources! Very nice indeed. They're hard to find though. I'm having serious challenges letting go of mine, cause it sound pheonominal, and is RARE!