Announced in September of this year, Bowers & Wilkins is now shipping its A7 ($800) AirPlay-enabled speaker. A six-inch bass driver, and two total pairs of one-inch tweeters and three-inch mid-range drivers are packed into the sound system. The fabric, plastic, and metal design matches that of the company's MM-1 computer speakers, though converted into an all-in-one casing with a prominent rear bass ventilation hole. On one side of A7 you'll find…