The Bowers & Wilkins CWM663 are a pair of in-wall speakers for the highest level of integrated home audio requirements. These sit at the top of the Bowers & Wilkins CI600 range & provide the best performance & quality sound as a result. Featuring the highest quality cross-over components of the range the CWM663 can have up to 150W of amp power. Perfect for when you need a louder speaker. Featuring a HF switch this speaker can be fine tuned for the best possible performance for your space.