Bowers & Wilkins: CCM663SR Single Stereo In-Ceiling Speaker...

... a high performance twin voice coil Aramid Fibre bass/midrange driver with an offset array of two soft dome tweeters provides highly accurate and natural sound combines the stereo signal injust one ceiling speaker.
Also included is a two-position stereo/surround switch to instantly make the speaker very suitable to be used as a surround channel.

B&W CCM663SR Info Sheet

The combination of convenience and performance that is a feature of the entire custom installation range is no better demonstrated than by the CCM663SR ceiling speaker. It marries a woven Kevlar coned twin voice-coil 150mm (6in) bass/midrange driver with an offset array of two 25mm (1in) soft dome tweeters. Thanks to its highly accurate and natural sound, Kevlar features on our most advanced high performance hi-fi speakers and it brings the same qualities to the CCM663SR. The twin voice coils and tweeters combine the stereo signal to enable the use of just one ceiling speaker in an installation zone without the loss of one audio channel. The CCM663SR also includes a two-position stereo/surround switch to instantly make the speaker very suitable to be used as a surround channel.

B&W CCM663SR Specifics:

• 2x 25mm (1in) Soft Dome Tweeter
• 1x 150mm (6.0in) black glassfibre cone bass/midrange.
• 2-way in-ceiling system
• Frequency range: 48Hz to 30kHz
• Recommended amplifier power: 25w - 80w (per channel)
• Sensitivity: 83dB (89dB both channels driven)
• Nominal impedance:8ohms
• Frame Diameter: 240mm
• Cutout Diameter: 202mm
• Depth Behind Surface: 133mm
• Protrusion: 4mm
• Optional Pre-mount Kit: C6
• Optional Back Box: 6C