BMW (UK) Ltd Product Marketing January 2007 Page 40
The new BMW 5 Series Individual Audio System
The BMW Individual Audio System sets new standards with regard to sound quality and sound experience
16 high-performance loudspeakers with strong neodymium magnetic drives and light, extremely stiff hexacone membranes.
Digital 9-channel amplifier with powerful DSP (Digital Signal Processing) with Stereo and Surround sound settings; maximum amplifier output of 825 Watts.