You'll appreciate them on a normal 5.1 set - up, or if lucky enough, with an added rear centre speaker. (bbc.co.uk)
Its 16 speakers include an illuminated centre speaker which retracts almost fully into the instrument panel. (press.bmwgroup.com)
Interior: new leather seats, optimised noise levels, Rear Seat Entertainment package and sound system with extending centre speaker. (press.bmwgroup.com)