Design an audio powerhouse with this two-way Bowers & Wilkins in-wall loudspeaker. It produces tight, crystal-clear treble thanks to its 1-inch Diamond dome tweeter with Nautilus tubing and a Flowport airflow system. The 7-inch bass/midrange driver of this Bowers & Wilkins in-wall loudspeaker has an anti-resonance plug to reproduce audio signals consistently. Use of BB8.5W Back Box is mandatory. Fully Matrix braced, for extra rigidity and improved performance the back boxes feature bi-wireable cables that connect to the baffle electronically with a multi-pin connector. The Bowers & Wilkins CI800 Series Diamond range of custom installation speakers is engineered for discerning customers who demand great hi-fi and home cinema sound from loudspeakers that occupy minimal space. This exceptional range of in-wall and in-ceiling loudspeakers features all the key transducer technologies developed for the globally renowned 800 Series Diamond including Diamond dome tweeters, Continuum midrange drivers and Aerofoil bass cones. The result is outstanding levels of performance that once again raise the bar for custom installation loudspeakers.