Bose EdgeMax EM90/EM180. Bose Professional’s EdgeMax in-ceiling speakers feature PhaseGuide technology with high-frequency compression drivers, creating a new category that combines the room-filling coverage patterns typical of larger in-ceiling speakers with the aesthetics favored by architects in in-ceiling models. EdgeMax speakers are designed to be mounted near wall/ceiling boundaries and offer improved audio quality and coverage compared to traditional ceiling speakers with dome tweeters, while reducing the number of units required.

Product details : https://www.boseprofessional.com/en-us/products/loudspeakers/ceiling-mount/edgemax/edgemax-em180-loudspeaker