Yeah, I have on-wall M3 speakers that I am using for Atmos. My ceiling is a few inches under 8feet, so I needed to angle each entire speaker.
If I was starting from the construction phase, I would have planned for in-ceiling speakers instead for a cleaner look since the in-ceiling M3s have aimable tweeters. Since my room is soundproofed, I would have had to cut 4 large holes into my soundproofed ceiling, and besides compromising the soundproof structure, I also would have never found 4 good locations for speakers that wouldn't hit some ceiling joist or drywall decoupling hat-channel.
So that mean something below my ceiling, and with a ceiling under 8 feet, I had to be able to aim the whole thing.
