Spec Sheet Preview: The Alpha Communications® IH008, PH8-1 and TB8X ceiling speaker accessories are designed to provide quick and secure mounting of the RB8S and RB8ST (series) ceiling speakers. The IH008 mounting ring is designed for mounting 8" (diameter) speakers in tile or sheetrock ceilings. They may be split and threaded into a 10.0" (diameter) hole. Ideal for suspended ceilings. It may be used with the optional PH8-1 protective enclosure. The TB8X is made of Flamex (U.L. rated 94 V-O) flame retardant material and is designed for s …