The KEF Ci3160REFM-THX is a world-class speaker that is handcrafted by KEF engineers in Maidstone, UK. It does not only meet the standards set by The Reference but also one of the highest THX® performance classes – THX® Certified Ultra. Together with the 12th generation Uni-Q driver array with Metamaterial Absorption Technology (MAT™), Ci3160REFM-THX delivers an immersive, high-fidelity soundstage with unmatched sonic excellence even for large home theatres and living rooms. KEF Ci3160REFM-THX Information and Specifications: Realistic, high-fidelity sound Featuring two 160mm (6.5in.) bass drivers, Ci3160REFM-THX delivers a clean, rich and highly articulate bass down to 35Hz. Together with the massive, vented motor system that was designed specifically for an in-wall environment, making Ci3160REFM-THX disappear into the room to leave an awe-inspiring, immersive experience. THX® Certified Ci3160REFM-THX delivers ultra-high performance with true theatre sound quality for large theatres and living rooms and it is THX® Certified Ultra. 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. KEF CI3160REF-THX Specifications: Nominal Impedance 4ΩSensitivity (2.83V/1m) 89dBFrequency Response (±6 dB) open-backed 40 – 28kHzFrequency Range (-10 dB)32 – 45kHzNominal Coverage (degrees)150°Crossover Frequency600Hz, 3000HzDrive UnitsLF: 2 x 160mm (6.5in.)MF: 125mm (5.25in.) Uni-QHF: 25mm (1in.) vented aluminium dome with Metamaterial Absorption TechnologyRecommended Amplifier Power 50 – 350 WRecommended High-pass Filter (Hz) 35Hz – 80HzProduct External Dimensions (H X W X D) 680 x 230 x 105.7mm (26.77 x 9.06 x 4.16in.)Cut-out Dimensions (H X W) 660 x 209mm (25.98 x 8.23in.)Net Weight 13.6kgMounting Depth From Surface 99mmOptional Rough-In Frame RIF3160LIdeal Rear Volume (L) 60Minimum Rear Volume (L) 30Max SPL (dB) 110dBCertification THX Certified UltraWall Sheet Thickness (Maximum) 40mmWall Sheet Thickness (Minimum) 6mm Sold as each speaker *This product may take 12 -14 weeks for delivery.