Originally Posted by Luminated67
The room my HT system ended up in wasn't the original choice, so at the time of designing the house I decided to increase the ceiling height of the room below it by a foot and a half what had the knock on affect on the room above. Unfortunately room I had chosen got re-purposed and I ended up with the room with the hipped ceiling which ruled out Atmos and a screen any wider than 106" 16:9.
At least it's still wide enough to fit 3 fat boy recliners in a line and a meter down either side of them but ruled out a second row.
atmos is still doable even if you will not carve speakers into the ceiling. i have same exact situation with no space in the basement ceiling to mount anything there, so, the configuration i run is the 3 front speakers, 2 surrounds at the same 4ft height from the floor as the front speakers, 2 rear speakers, so, atmos is set on the usual 7-4-1 scheme.
atmos speakers do hang on the walls next to the ceiling, on both sides of the room. 2 speakers are in the middle of the room, right in between of the listening area and the screen, and 2 are in the same line with the listening area (or may be slightly behind it). i used Klipsch R-14S there, and, while not perfect, it works surprisingly well. fronts are b&w nautilus 805, surrounds are B&W 605. i listened to a proper configuration with ceiling speakers quite a lot of times in the salons, then ran same atmos demo disk video at home - it is very close. not the same, but close enough. you can tell the moving of insects/birds from the demo, or what was in it, overall it all works.
onkyo tx-rz1100 has a configuration for atmos that uses a setup like that and it works. ceiling speakers would be better for localization, but, it is still better than nothing.
and, it is way better than a reflective atmos small speaker on top of the front speaker - that is not working well at all compared to side mounted wall speakers, at least not in the small basement room.