Description Reference Series In-Ceiling Speaker, 7in EACH Designed for down-firing, in-ceiling use, CCM7.5 S2 can be used as the left, centre, right and rear-channel rear speakers in a discreet home cinema system. Its configuration includes a 25mm (1in) Carbon Dome tweeter and a 180mm (7in) Continuum cone mid/ bass cone angled to the mounting surface, allowing for easy direction of the whole array towards the listener to ensure they hear the correct balance of sound. That way, dialogue is crystal clear and special effects come across accurately. Thanks to Bowers & Wilkins unique QuickDogsTM fixing method, installation is simple and if preferred, the supplied round grille can be replaced with an optional, square grille. 1x ø25mm (1in) Carbon Dome high-frequency 1x ø180mm (7in) Continuum cone mid/bass Dimensions: Cutout: 254mm (10in) Depth behind surface: 128mm (5in) Grill size: 290mm (11.4in) Accessories: New Construction: BW-PMK C8 Metal Back Box: BW-BB-6C Square Grille Conversion: BW-GR68SQ