NextLevel Acoustics is a relatively new company that began selling in-wall speakers and subwoofers in 2016. They sell a CI series that is sold through authorized dealers. This upgraded line should be considered if you are looking for high quality in-wall speakers at a very reasonable price point. High performance in-wall speakers are not common and considering their price these are unique in the marketplace.
The CI series consists of 8 different in-wall speakers along with a ceiling speaker for use with Atmos or DTS-X. With performance specifications that include 400 watts of power handling and 90 db/watt efficiency these speakers are in a class comparable to Triad.