The Tannoy CMS 403DCE is a 4-inch, full-bandwidth ceiling loudspeaker with a dual concentric driver designed for a variety of installation applications. Utilizing Tannoy's third-generation CMS 3.0 technology, it features a proprietary Dual Concentric point-source driver with Omnimagnet and Torus Ogive Waveguide technologies. The loudspeaker provides wide and consistent broadband directivity for enhanced intelligibility and a linear response. The blind-mount design includes an integrated ABS back-can and a self-aligning clamp system for quick and cost-effective installation.