Bowers & Wilkins CCM662, 2-Way Ceiling Loudspeaker, 1x 25 mm aluminium dome tweeter with Nautilus tube technology, 1x 150 mm Kevlar cone woofer, Frequency range: 45 - 50,000 Hz, Peak SPL: 88 dB, Impedance: 8 Ohm, Recommended amplifier power: 25 - 150 W, Frame diameter: 240 mm, Ceiling cutout diameter: 202 mm, Depth (from the surface): 133 mm, Distance to the surface: 4 mm, Colour: Black, White grille included