The BB-C650 is a back box, designed specifically to enhance the speaker's performance. It utilizes the ideal air volume for the speaker, and acts as a sound chamber, directing the critical sound to the sweet spot. It also reduces the sound going to other rooms/floors up to 10db, and provides one hour fire break protection. For use with the C660, C650; C645, C640, C620, C610, C605 and C600TT ceiling series speakers.
Proficient Audio SYSTEMS BB-C650 Pre-Construction Speaker Back Box, Proficient Audio Systems ADI, Proficient Audio