The KEF Ci200RS-THX sits at the top of KEF's acclaimed Ci in-ceiling speaker range. Carrying full THX certification, it is designed for audiophiles who demand the very best from a flush-mounted ceiling installation, whether for home cinema surround sound or high-quality multi-room audio.
Uni-Q Point-Source Driver
At the heart of the Ci200RS-THX is KEF's Uni-Q driver array. The tweeter is mounted concentrically within the throat of the 200mm (8-inch) bass/midrange unit, creating a single acoustical point source. This arrangement produces a wider, more cohesive soundstage than conventional two-driver designs, with consistent tonal character throughout the listening area rather than a restricted sweet spot.
Tangerine Waveguide and Z-Flex Surround
KEF has fitted the Ci200RS-THX with an improved tangerine waveguide on the 38mm (1.5-inch) aluminium dome tweeter. The distinctive veined housing guides high-frequency energy smoothly away from the driver, integrating the treble with the midrange more naturally and extending dispersion at higher frequencies. The woofer uses KEF's Z-Flex surround, a profiled rubber surround that offers superior piston control, keeping cone movement linear and precise for tight, accurate bass reproduction.
THX Certification and Installation
THX certification means the Ci200RS-THX has been independently tested and verified to meet the acoustic standards required for reference-level home cinema reproduction. Installation is straightforward: the speaker clips into a circular cutout of 240mm diameter using spring-loaded dog-leg clamps, and the magnetic grille snaps on invisibly. No special skills or tools beyond basic DIY are required. A fire hood is recommended in most UK installations; low smoke/zero halogen cable may also be specified by your installer.
Sonically matched to other speakers across the KEF Ci range, the Ci200RS-THX integrates seamlessly into multi-room or multi-channel systems where consistent tonal balance from room to room is essential.