Originally Posted by LarryChanin
Aren't the prosceniums of certain concert halls designed to enhance these ceiling reverberations?
Lexicon's goal may not be to recreate the feeling of being in a large hall. You've got to stop approaching height speakers from a DSX mindset.
It is true that research has shown that we can maximize spaciousness and increase Apparent Source Width by preserving certain reflections coming from the sides at around 55-60 degrees. However, for some reason apparently Lexicon didn't think it was necessary to place any speakers in the front-wide-side positions and instead choose to place them overhead.
There's nothing to stop you from placing your side speakers forward of the main listening position, as Floyd Toole always does. While the sense of spaciousness may maximize at around +/-60 degrees, it is still pretty effective at 80-90 degrees. And just because Lex doesn't have dedicated wide speakers at the moment doesn't mean they won't in the future. It just happens to be a lower priority for them than heights.
So my question was wouldn't DTS Neo:X, with its speaker placement and processing, be an approach that would be superior to Lex's approach if precise imaging is the desired effect that I am looking for?
If the desired effect you're looking for requires dedicated wide speakers, then Neo:X would be "superior", since Quantum Logic doesn't even use any dedicated wide speakers. It's like you're asking me to state a tautology.
BTW, do you get convincing imaging/localization between your front speakers and side speakers? If so, what do you think wides will bring that you're not getting already? By comparison, do you routinely hear ambient sounds above you?
I thought in order to support a stable phantom image that the content had to be in-phase. To me imaging out-of-phase content sounds like an oxymoron.
Place a pair of speakers directly to your left side, spread maybe 5 feet apart on your left wall. Wire them out of phase with each other and feed them the same mono signal. The resulting decorrelated sound won't create precise imaging across the 5-foot wide soundstage to your left. However, there will be no mistaking that those sounds (however indistinct) are clearly to your left.
Likewise, when I spoke about creating a soundstage overhead, I didn't mean something with pin-point imaging. If you shut off all the speakers except the heights, and whatever you hear (no matter how ambient or indistinct) clearly seems to come from above you, then the height effect has worked. Nothing more complicated than that. And for the love of god stop thinking about prosceniums in a concert hall.