B&W CCM663 Premium 6" Ceiling Speakers The B&W CCM663 is a true high performance ceiling-mount speaker... The tweeter has a 25mm (1in) aluminium dome and its housing pivots for adjustable off-axis treble response. The bass/midrange driver’s die-cast chassis provides extra rigidity which results in a cleaner, faster bass, and a three-position EQ switch for a better off-axis response. The blue Kevlar® cone means that the unit is well hidden behind the grille but still produces a remarkably clear and dynamic sound. Incorporating QuickDogs™ and plug-and-play functionality it is quick and easy to install. Specifications Description 2-way in-ceiling system Drive Units 1x ø25mm (1in) Nautilus™ swirl loaded aluminium dome tweeter, 1x ø150mm (6in) blue Kevlar® cone bass/midrange Frequency Range (-6dB) 45Hz – 50kHz Recommended Amp Power 25 – 130w Sensitivity SPL (2.83V, 1m) 88dB Impedance Nominal (min) 8Ω (4.5Ω) Frame diameter 240mm (9.5in) Cut-out diameter 202mm (8in) Depth behind surface 133mm (5.2in) Protrusion 4mm (0.2in) Pre-mount Kit C6 Back Box 6C