The Bowers & Wilkins CWM7.4 S2 is a 2.5-way in-wall speaker. This has much of the same functionalities as the CWM7.3 the same Carbon Dome tweeter & the same Continuum cone mid-range. The bass cone is made from Aramid Fibre & paper the same material found in the high-end CI600 speakers. This speaker is ideal for large media rooms or dedicated listening spaces. Its slim design is elegant & will blend into many spaces it is installed. The technology employed in this speaker unit has been developed by some of the best acoustic engineers in the world. All their knowledge & experience can be heard throughout the entire CI700 range.