Bowers & Wilkins CCM 7.3 S2 The CCM7.3 S2 is a high-performance in-ceiling speaker for outstanding performance in both theatre and stereo applications. Its sophisticated drive unit configuration features a 25mm(1in) Carbon Dome tweeter, a 100mm (4in) FSTTM Continuum cone midrange and 2 x 130mm (5in) Aerofoil Profile bass drivers. Its critically formed baffle is constructed from glass-reinforced ABS while its integrated backbox ensures easy retrofittable installation, cuts down sound transfer between spaces, and optimizes sound quality. Drive Units 1" Carbon Dome Tweeter 1 x 4" Continuum Cone FST Midrange 2 x 5" Aerofoil Profile Bass 25 - 200W Specifications Design 3-way in-ceiling system Technical Features Carbon Dome tweeterContinuum cone FST midrangeAerofoil profile bass cones Drive units 1x 25mm (1") Carbon Dome high-frequency1x 100mm (4") Continuum cone FST midrange2x 130mm (5") Aerofoil profile bass Frequency range (-6dB) -6dB at 52Hz and 33kHz Frequency Response -3dB 55Hz - 28kHz ±3dB Sensitivity 90dB spl (2.83Vrms, 1m) Impedance Nominal (min) 8 Ohm (Minimum 3.1 Ohm) Recommended amplifier power 25W - 200W into 8 Ohm on unclipped program PMK 7C Approximate Dimensions FrameHeight: 14"Width: 14" Cutout Height: 13.1"Width: 13.1"Height With PMK: 13.2"Width With PMK: 13.2" Protrusion 0.3" Depth 7.66" Approximate Weight Unit: 19.84 lbsShipping: 23 lbs UPC 714346332144 Series 700 Series, CI 700 Series D Distortion 2nd and 3rd harmonics (90dB, 1m)