I have a yamaha rx-v1400, when watching a movie (example, star wars III) i notice that 7ch stereo sounds more full. I gather that's because all speakers are used. However I'm wondering if this is better than DTS EX. That is when selecting 7ch stereo does it still respect all the surround effects? Appreciate any input.
7Ch stereo will most likely take the 2channel audio then spread that to all the speakers. Where as the DTS, or DD will give you the intended sound from each speakers. So instead of having voices coming from all speakers, it will be coming from the front speakers. The stuff that is supposed to be in the surround will only be in the surround speakers with DTS, and DD. Now that might not be how that receivers 7 channel stereo works. But it would be easy to check. Play a movie using DD, or DTS where you have one person talking thats just coming out of the front or center speaker. Then turn it to 7channel stereo and see if you are getting that same voice but out of all the speakers.