The Tannoy CVS 401-BK is a compact, value-oriented coaxial in-ceiling loudspeaker engineered for commercial and residential distributed audio systems where space is limited and clear, intelligible sound is required. This model integrates a 4-inch mineral-filled polypropylene woofer and a 1-inch polyamide dome tweeter in a coaxial configuration, aligning the acoustic centers of both drivers to promote coherent sound dispersion and stable imaging. The design prioritizes vocal clarity and midrange presence, making it highly effective for background music and spoken word applications such as paging and announcements in environments like retail stores, offices, restaurants, and hospitality suites. The loudspeaker is built into a non-vented, sealed ABS plastic back-can enclosure finished in black, which provides essential acoustic loading for controlled bass performance and serves as a built-in protective barrier against dust and insulation when installed in a ceiling plenum, significantly simplifying the installation process compared to separate back-can solutions.

This speaker is equipped with an integrated multi-tap line-matching transformer, offering direct compatibility with standard 70V and 100V constant voltage public address systems, as well as a direct 8-ohm bypass for use with conventional low-impedance amplifiers. This dual functionality provides installers with maximum flexibility for system design, allowing the CVS 401-BK to be deployed in both new constructions and retrofit projects across various audio architectures. The transformer features multiple power tap settings, enabling precise level balancing across a zone of speakers to ensure even coverage. Installation is straightforward, facilitated by a user-friendly chassis with a tool-free, four-point dog-leg mounting system that securely clamps the unit into a standard circular cut-out, ensuring a rattle-free fit in various ceiling materials.

With a design focused on reliability and ease of integration, the CVS 401-BK delivers efficient, clear sound output suitable for moderate-level applications. Its all-black finish, including a paintable perforated steel grille, allows for discreet visual blending into most ceiling environments. This loudspeaker represents a practical, cost-effective solution for contractors and system designers seeking a dependable, all-in-one coaxial ceiling speaker that delivers consistent performance for general-purpose audio distribution where broad frequency response and high output are not the primary demands.