Bowers & Wilkins CCM663 In ceiling speaker is best described as a high-performance 6in in-ceiling loudspeaker it features a Nautilus swirl-loaded 25mm (1in) aluminium dome tweeter that pivots for adjustable off-axis treble response. This high-performance 6in in-ceiling speaker features a Nautilus swirl-loaded 25mm (1in) aluminium dome tweeter that pivots for adjustable off-axis treble response. Other highlights include a bass/midrange driver with a rigid die-cast chassis and a three-position EQ switch. The maximum amp power is 130W. Installation couldn’t be easier, thanks to our QuickDogs fixing system and plug-and-play connection. Features: Blue Kevlar cone bass/midrange driver Nautilus swirl loaded aluminium dome tweeter Pivoting tweeter Adjustable EQ Round or Optional square grill cover GR66SQ QuickDogs™ and plug-and-play functionality make installation a breeze. 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) Supplied as pair