The Bosch LC4-CBB is an optional back‑box for the Bosch LC4-UC06E, LC4-UC12E and LC4-UC24E ceiling speaker range. When used with this back box, these loudspeakers are then compliant with EN54-24 voice alarm standards. Total 95mm depth when fitted to Bosch LC4 ceiling speaker range.
The Bosch LC4-CBB protects the rear of the loudspeaker from dust and other falling debris, makes it vermin proof and prevents sound traveling via the ceiling cavity to adjacent areas.
The back‑box has a snap fit fitting to the loudspeaker and has knock‑out holes for two grommets (11.5 mm) and for two cable glands (20.5 mm) on the top.