Ci160CRds Dual Stereo KEF’s Dual Stereo models are high-fidelity flush-mount speakers that recreates stereo, and are ideal for locations where there is only room for one speaker. Thanks to KEF's simple and ingenious screw down clamping system - with moisture-resistant fixings - you can place these speakers in environments such as bathrooms or under eaves. Nominal Impedance 8 Ohm Sensitivity 91dB (2.83V/ 1m) Crossover Frequencies 3.2kHz Frequency Response 50Hz - 20kHz (±6dB) open backed Drive Units LF: Dual voice coil 160mmHF: 2 x 19mm (0.75in.) Recommended Amplifier Power 10 - 80W Product External Dimension (H x W x D) Diameter : 234.6mm (9.24in.)Depth : 93mm (3.66in.) Cut-Out Dimensions (H x W) Diameter : 196mm (7.71in.) Without back can Mounting Thickness Ceiling Thickness (Maximum): 36mm (1.42 in.)Ceiling Thickness (Minimum): 6mm (0.24 in.) Mounting Depth From Surface Product only : 86mm (3.36in.) Optional Rough In Frame RIF160R Net Weight 1.80kg (4.0lbs.) Unit Measurement Piece Downloads ManualProduct Group Spec. SheetIndividual Information Spec. SheetMinimum Cabinet Volume ChartCutout TemplateEASE GLL DATAProduct DrawingSelection And Setup GuideArchitectural Speaker Accessory GuideArchitectural Speaker Brochure