Originally Posted by garage_logician
I can mount them up on the wall, the problem with a ceiling mount is that it is vaulted (not the greatest for a home theater). I can mount them at the ceiling/wall junction both front and back. How are front height and rear height speakers different than Atmos speakers? How many high speakers do I need for Atmos? 2? 4? 6?
TIA for all your help.
I suggest that you download and read this: https://www.dolby.com/us/en/technolo...guidelines.pdf
Notation: 5.1.4 means 5 base speakers, 1 subwoofer, 4 Atmos speakers.
If you have a vaulted ceiling, Dolby enabled (ceiling bounce) speakers are not
recommended. The normal use is with a flat ceiling, ideally 7.5 to 12 feet (2.3 to 3.66m) high, and acoustically reflective. If you chose to use them anyway, no Dolby police would show up at your door, but the effects may be much worse than optimal.
Given the vaulted ceiling, my first choice would be mounting them as high as possible on the side walls, pointed down towards the listening position. SVS Prime Elevation speakers are designed for that (among other things), but you can also use regular speakers with separate tilt mounts. I believe that some AVRs have provision for side Atmos speakers. My Denon AVR-X4300H (2016 model) does not; I'm using the overhead setting, which isn't optimal.
The next choice would be speakers high on the front and rear walls.
4 Atmos speakers is the recommended number. If you wanted to use 6, I believe that the supported setup with the fewest channels is 7.1.6. (7 base speakers, 6 Atmos.) That'd require 13 amplifier channels. A Denon AVR-X8500H would support that, for a price. Your 3080 has 9 amplifiers, so it could do 5.1.4. It processes 11 channels, so you could add an external amp and do 7.1.4. (I'm pretty sure that 5.1.6 is not an allowed configuration.)