Looking for a serious in-wall speaker? Look no further the KEF Ci5160REFM-THX is KEF’s first in-wall speaker to be THX® Certified Dominus* among the very few that can achieve this ultimate standard worldwide. Together with a 12th-generation Uni-Q driver array with Metamaterial Absorption Technology (MAT™), Ci5160REFM-THX delivers an immersive, high-fidelity soundstage with unmatched sonic excellence even for the most extensive home theatres and living rooms. KEF CI5160REFM-THX Information and Specifications: Realistic, high-fidelity sound Featuring four 160mm (6.5in.) bass drivers, Ci5160REFM-THX delivers a clean, rich and highly articulate bass response down to 32Hz. Together with the massive, vented motor system that was designed specifically for an in-wall environment, making Ci5160REFM-THX disappear into the room to leave an awe-inspiring, immersive experience. Metamaterial Absorption Technology Absorbs 99% of the unwanted sound Handcrafted in UK As our high-end speakers, Ci-Reference is designed, engineered, and hand-built in Maidstone, UK Uni-Q® Acts as a single point source to enlarge the ‘sweet spot’ and disperse sound more evenly. Finished to perfection Available in Aluminium Black/Grey, a hairline-finished aluminium baffle in black, with the Uni-Q driver array in grey. Hide your speakers, not your sound The paintable magnetic metal grille and optional black cloth grille ensure the speaker seamlessly blends into the environment. Total attention to detail The 11mm thick precision-machined aluminium baffle is engineered to eliminate vibration and provides a stoic platform for powerful drivers to perform at their best. THX® Certified Dominus *Dominus is the newest and the largest performance class of THX Certification, meant to bridge the gap between large home theatre speakers and those used in movie houses worldwide. Home theatre owners with rooms up to 184 cubic meters of space and up to a 6-meter viewing distance can fill their entertainment space with the superior audio quality they expect from THX Certified products. KEF CI5160REFM-THX Specifications: Nominal Impedance 4ΩSensitivity (2.83V/1m) 92dBFrequency Response (±6 dB) open-backed 40 – 28kHzFrequency Range (-10 dB) 32 – 45kHzNominal Coverage (degrees) 150°Crossover Frequency 600Hz, 3000HzDrive UnitsLF: 4 x 160mm (6.5in.)MF: 125mm (5.25in.) Uni-QHF: 25mm (1in.) vented aluminium dome with Metamaterial Absorption TechnologyRecommended Amplifier Power 50 – 500 WRecommended High-pass Filter (Hz) 35Hz – 80HzProduct External Dimensions (H X W X D) 1070 x 230 x 105.7mmCut-out Dimensions (H X W) 1052 x 209mmMounting Depth From Surface 99mm (3.9in.)Optional Rough-In Frame RIF5160LIdeal Rear Volume (L) 90Minimum Rear Volume (L) 40Max SPL (dB) 116dBCertification THX Certified DominusWall Sheet Thickness (Maximum) 40mmWall Sheet Thickness (Minimum) 6mm Sold as each speaker *This product may take 12 -14 weeks for delivery.