Ci160QL Featuring KEF's sophisticated 'sit anywhere' Uni-Q driver array, which places the tweeter in the acoustic centre of the bass/midrange cone, this allows both the tweeter and woofer to act as a single point source that disperses the sound widely and evenly throughout the room. Together with the discreet Ultra Thin Bezel (UTB) design, offering the slimmest possible visible rim around the speaker, the Ci-Q Series range gives you tremendous freedom to position the speakers where you please. Nomimal Impedance 8 Ohm Sensitivity 89dB (2.83V/ 1m) Crossover Frequencies 3.0kHz Frequency Response 38Hz - 34kHz (±6dB) open backed Drive Units LF: 160mm (6.5in.)HF: 19mm (0.75in.) Uni-Q Recommended Amplifier Power 10 - 125W Product External Dimension (H X W X D) 303 x 223 x 97.5 mm (11.93 x 8.78 x 3.84 in.) Cut-Out Dimensions (H X W) 274 x 194 mm (10.79 x 7.64 in.) Mounting Thickness Ceiling Thickness (Maximum): 30mm (1.19 in.)Ceiling Thickness (Minimum): 3mm (0.12 in.) Mounting Depth From Surface 91mm (3.58in.) Optional Rough In Frame RIF160L Optional Rear Enclosure RNC160L Net Weight 2.05kg (4.51lbs.) Document Download ManualIndividual Information Spec. SheetArchitectural Speaker BrochureProduct Group Spec. SheetMinimum Cabinet Volume ChartCutout TemplateEASE GLL DATAProduct DrawingSelection And Setup GuideArchitectural Speaker Accessory Guide