it really depends on your setup... with my old htib system i couldnt hear any difference at all. got new towers and receiver and now i can hear the difference between dvd and dolby digital plus and truhd
and truhd is leaps and bounds better then dvd quality through hdmi then optical.
here is the system i had and a graph of the speakers response
the second one is with def tech towers and center channel and denon 2807 receiver (graph)
so it shows how with a...