 Each front door contains a woofer, a mid-range speaker and a dome tweeter (the latter two wired in parallel with a crossover), while each rear door houses a similar woofer and tweeter.As a centre speaker there is a full-range driver, similar to the two full-range 'surround' speakers located on the rear parcel shelf.The B&W system has been reviewed by journalists at "Autocar" magazine, who proclaimed it the best in-car system they have ever heard.