For extreme home theater experiences, the KEF Ci-R Series in-wall subwoofers Ci3160RLb-THX and Ci5160RLb-THX deliver deep bass and theater-level sound quality with THX Ultra and Select certification. The Uni-Q driver serves as a single point source to evenly disperse sound across the listening area, absorbing 99% of unwanted sound. Models Ci5160RLM-THX and Ci3160RLM-THX achieve ultra-high performance rated THX Certified Ultra for large rooms and theaters. Four hybrid aluminum bass drivers ensure tight, deep, controlled bass output. The 5.5mm precision-machined aluminum baffle eliminates vibration, supporting the powerful drivers for optimum performance. A paintable magnetic metal grille and optional black cloth grille allow seamless integration with any environment. Available in aluminum silver with tone-matched Uni-Q and bass drivers. Features include THX Certified High Performance, KEF Uni-Q Driver with Meta Technology, and size options Ci5160RLM-THX and Ci3160RLM-THX. Discover the pinnacle of home theater sound with these advanced in-wall subwoofers. Specific warranty terms and details for KEF products can be found here.