The 508/2B is quite simply the best 8-inch ceiling loudspeaker in the world. It is an 8-inch coaxial loudspeaker with an 8-inch LF cone section and a 1-inch exit HF compression driver. Unlike inferior 8-inch ceiling speaker designs that use dome tweeters as HF devices, Radian uses a true 1-inch exit compression that provides clean, clear articulation and intelligibility for ceiling installations up to 22 feet in height.