Overview Designed for down-firing, in-ceiling use, CCM7.5 S2 can be used as the left, center, 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, the dialogue is crystal clear, and special effects come across accurately. Thanks to Bowers & Wilkins unique QuickDogs fixing method, installation is simple and if preferred, the supplied round grille can be replaced with an optional, square grille. Specifications Design: 2-way in-ceiling system Technical Features Carbon Dome tweeter Continuum mid/bass Drive units 1x 25mm (1") Carbon Dome high-frequency 1x 180mm (7") Continuum cone mid/bass Frequency range (-6dB): -6dB at 25Hz - 33kHz Frequency Response -3dB: 32Hz - 28kHz ±3dB Sensitivity: 90dB spl (2.83Vrms, 1m) Harmonic distortion 2nd and 3rd harmonics (90dB, 1m)