One metal back box for C790, C800, C850, C800TT and C850TT ceiling speakers and C840 and C870 LCR ceiling speakers. UL 263-03 1-hour fire rating.
One metal back box for C605, C610, C620, C625, C640, C645 and C600TT ceiling speakers and C650, C655 and C660 LCR ceiling speakers. CMB-24 mounting bars are needed when installing in ceiling joists 24" on-center or suspended ceilings. UL 263-03 1-hour fire rating.
One metal back box for W665, W670, W680 and W690 inwall speakers. UL 263-03 1-hour fire rating.
One pair of ceiling mounting bars slip into clips on BB-C650 back box. For installation in ceiling joists 24" on-center or suspended ceilings.
Medium Density Fiberboard (MDF) back box for the IWS100 sub, designed to fit any standard 16" stud bay. Cuts down on translational energy vibration between adjacent walls. The IWS100 sub is tuned to the BB-IWS10 back box. Not for use with ICS10 and IWS82.