The Tannoy CMS403D-CE is a professional 4-inch full-range directional ceiling loudspeaker designed for discreet, high-quality audio in commercial installations, featuring Tannoy's Dual Concentric driver technology and a "Blind Mount" design. The Dual Concentric design places a high-frequency compression driver at the acoustic center of the bass/midrange cone, ensuring sound from both drivers originates from the same point. This results in exceptional phase coherence, precise imaging, and a controlled dispersion pattern. The "Blind Mount" (CE likely denotes a specific ceiling entry or concealed design) means the speaker is installed above the ceiling tile or drywall, with only a flush, paintable grille visible from below, creating a completely invisible audio source that preserves the clean aesthetics of modern architectural spaces such as corporate offices, high-end retail, and hospitality environments.

This compact loudspeaker is built with a rigid, fire-retardant enclosure designed to fit within standard ceiling plenums. It includes a built-in multi-tap transformer for easy integration into constant-voltage (70V/100V) distributed audio systems, allowing installers to select the appropriate power tap to match the speaker's output level to the acoustic requirements of the zone. This simplifies the design of large-scale sound systems. The directional nature of the Dual Concentric design provides controlled coverage, which can be advantageous for focusing sound in specific areas or minimizing spill into adjacent spaces. The speaker delivers clear, articulate audio for background music and speech reinforcement.

For system integrators and designers, the Tannoy CMS403D-CE represents a sophisticated solution for achieving high-fidelity audio in visually sensitive and spatially constrained applications. Its ability to deliver the sonic benefits of coaxial design from a completely concealed, compact installation addresses the needs of premium commercial projects where space is limited and visual intrusion must be avoided. This loudspeaker ensures that high-quality, controlled sound is delivered without any visual compromise, meeting the demands of clients who require both exceptional acoustic performance and impeccable interior design.