The Monitor Audio C180 incorporates an 8-inch MMP II bass driver with Monitor Audio’s signature C-CAM Gold Dome tweeter to provide high performance sound, ease-of-drive, and wide frequency response and dispersion. Optimum imaging and set-up are established via a pivoting tweeter and high-frequency (+3 dB / 0 dB /-3 dB) level adjustment. Optional square grille can be used with this model.What You GetSINGLE 1 x C180 Ceiling Speaker 1 x White Grille 1 x Cut Out Template 1 x Instruction Manual ONE PAIR 2 x C180 Ceiling Speaker 2 x White Grille 2 x Cut Out Template 2 x Instruction Manual Specifications Frequency Response: 50 Hz – 25 kHz Nominal Impedance: 6 ohms Sensitivity (1W@1M): 90 dB Maximum SPL: 111.6 dBA Power Handling (RMS): 120 W Recommended Amplifier Requirements: 30 – 120 W Drive Unit Complement: 8"MMP II cone bass driver, 1"C-CAM pivoting Gold Dome tweeter Adjustment Controls: HF Level Switch (+3 dB / 0 dB / -3 dB) Overall Diameter (Including Grille): 285 mm (11¼") Overall Depth (Including Grille): 126 mm (4⅞") Mounting Depth: 122 mm (4⅞") Cut-Out Hole Diameter: 247 mm (9¾") Fixing Type: 3-position Tri-Grip dog fixings Construction Material: Mineral-filled ABS, RoHS compliant Weight: 2.72 kg Pre-Construction Bracket: CL-B Back Box: CML-BOX Sold As: Single unit Warranty: Lifetime