Bowers & Wilkins Metal Back Box: Crafted for Bowers & Wilkins CI 600 Series and CI 300 Series in-ceiling speakers, this fire-rated back box reduces sound transmission while improving audio performance.

Added before your drywall is installed, this fire rated backbox is used to reduce sound transmission between floors in your home. As an example, very useful if you tend to have parties in the kitchen when the baby's room is one floor above. Compatible with all CI300 and CI600 in-ceiling models. Must be used with a matching PreMountKit. See below for more information.