The Tannoy CMS 803DC PI is a high-performance, 8-inch dual concentric ceiling loudspeaker engineered for premium installed sound applications where exceptional audio fidelity and precise coverage are paramount. The "PI" designation signifies its design for Professional Installation, featuring a paintable, low-profile grille that allows it to blend seamlessly into the ceiling of upscale commercial environments such as high-end retail stores, luxury hospitality venues, boardrooms, and residential home theaters. Its standout feature is Tannoy's proprietary Dual Concentric driver technology, where the high-frequency compression driver is mounted at the center of the woofer's voice coil, creating a single, coherent point source. This design results in unparalleled phase coherence and a uniform wavefront, delivering exceptional stereo imaging and clarity even when listeners are off-axis.

The 8-inch paper pulp woofer is designed for robust, low-distortion bass response, while the 1-inch titanium dome compression driver, coupled to a Tulip Waveguide, ensures smooth, extended high-frequency dispersion. This integration minimizes lobing and comb filtering effects typical of separate drivers, providing consistent tonality across the listening area. The speaker includes a built-in multi-tap transformer for 70V/100V distributed systems, offering a wide range of power tap settings to perfectly balance output levels across a zone. For applications demanding the ultimate in sound quality, it can also be operated in low-impedance (8-ohm) mode directly from a quality amplifier, bypassing the transformer for the most transparent signal path.

Constructed for durability and ease of installation, the CMS 803DC PI features a rigid, molded polymer back-can that provides excellent acoustic isolation and prevents unwanted resonance. The design incorporates an innovative rotary switch for selecting impedance and tap settings, located for easy access after mounting, and includes a pivoting tweeter assembly that allows installers to aim the high-frequency coverage up to 15 degrees for optimal acoustic tailoring. Combining Tannoy's legendary coaxial driver technology with practical installation features, this ceiling speaker offers a reference-grade audio solution that meets both the acoustic and aesthetic demands of the most discerning professional installations.