The MCD1X2U from Bogen is a kit which consists of a MCDMOD Speaker Module and a MCD1X2UGRILLE 1' x 2' Ceiling Grille.
The MCDMOD from Bogen is a fully-enclosed MCD speaker module for drop-in ceiling sound reinforcement. The MCDMOD snaps onto a speaker assembly grille (sold separately). Since the module is not attached to the grille, it provides you the option of making wire connections before or after grille placement in the ceiling.
The off-white 1' x 2' Ceiling Grille from Bogen Communications is a drop-in speaker grille for a modular drop-in ceiling speaker. Depending on the application's aesthetics or grid configuration, you may select the 1' x 2' Ceiling Grille to fit in either 2' x 2' or 2' x 4' suspended ceilings. It features 3 seismic attachment points and includes a tile support rail crossbar.