I'm looking for in-walls for my family room.

The room is pre-wired for 7.1 but right now I'm just using NHT 1.2 mains and center. The plan is to go all in-walls and move the NHTs and the current A/V receiver to the master bedroom, for a 5.1 system.

The surrounds in the family room need to be about 10' high because of the room configuration
I'm looking at the Niles in-walls, and their web site is not clear about speaker adjustments.

The AT series clearly have tiltable tweeters, but the AT series doesn't have a center speaker.

The HD series has center speakers, but it's not at all clear that the tweeters can be tilted. The description just says that they have a Low-diffraction tweeter-adjustment mechanism. Is this tilt or something else?