 From 2008 to 2012, there was an optional Bowers & Wilkins (B&W) sound system available.At its core there are 14 speakers which (with the exception of the aluminium high-frequency tweeters) employ B&W's Kevlar composite speaker cones.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.