The CMSUB8 is a stereo subwoofer for ceiling mounting, designed to play powerful and deep bass. It has an 8 "speaker with double coil and passive filtering circuitry.It is the ideal complement for all types of satellite speakers: medium and small size speakers of the CM series of Apart (CM3T, CM4T and many more), and also the enclosures of type MASK4 of Apart They present a discreet design, identical to the one of the 8 "speakers for ceiling of Apart. They have an aluminum grid and can be used in environments with humid environments.