I believe with my Sony it has factory preset sound fields for the music such as Hall, Concert, Live house and such. I use them for DVD's in DTS and Dolby Digital and they sound great. With a PCM/Stereo signal they work also and output to the rears but not the center channel. I think this is the difference maybe. I'm starting to think I should of did a little more research before I purchased the sony receiver.
Does anyone else have experience with a sony 975 receiver ?