The Arc soundbar and its eleven class-D electronic motorists are for the Main, which includes twin upfiring speakers for overhead Dolby Atmos audio. The Arc provides crisp, apparent sound with deep bass on its own.  Projectors: Projectors Forged photos or video clip onto large surfaces, such as screens or walls. https://hometheatersystem76284.estate-blog.com/32265647/5-easy-facts-about-home-theater-projector-4k-described