Originally Posted by penngray
The angles of the speakers depends more on the speaker off axis response and not what Dobly generalizes.
Actually I think that for stereo the 30 dagree each, 60 degree total is about rightish regardless of speakers' off axis response. We're talking more about directional cues and less about the FR effects of off axis response. Deal with axis issues by adjusting toe in, at least sez me. YMMV
On the general topic, I've been running my fronts in the roughly 30 degree setup, which puts tham probably a couple of feet from the TV, without any problems. Experimentally, I placed them significantly farther apart (one potential rearrangement of my room would demand it) and while it was different with movies, I did not find it distracting. I think that's because in most movies most of the sound that's toward the center is present significantly in the center speaker. But I recognize this is likely an unusual personal non-preference kinda thing. Of course it's hopeless for imaging with a stereo signal, but I've tended to use one of the Dolby modes to expand my stereo sources into 5 channel, so the center can sort of (but not fully) fix it. As I said, experimental.
I also suspect that images panned hard left or right are likely to be off-screen sounds anyway, but that's (a) a WAG and (b) sure to differ from movie to movie. I admit it seems weird to me when I see setups that put the three fronts so close togehter that you must be getting "wide mono" with little spatial differentiation. But as others have said before it's personal preference, and you can do what you like.