What kind of sound system does the 2011 BMW 7 series have?

Is it the Bang %26amp; Olufsen surround sound like the A8 2011? If it isn't how much will it cost to install it?What kind of sound system does the 2011 BMW 7 series have?Features of the E38 7 Series included high-pressure headlight washers, auto-leveling xenon HID headlamps, power moonroof, a sound system with 14 speakers and four subwoofers as well as 6-disc CD changer, onboard satellite navigation and rain-sensing wipers. Other features included an automatic climate control system with separate controls for the driver and passenger, a three-position memory system for the driver鈥檚 seat, safety-belt height, new steering wheel and outside mirrors. Front-seat side airbags and a Head Protection System (HPS) were also standard. The car featured an all-leather interior with burl walnut trim. The continuous-motion Active Comfort Seat technology was introduced in 1998 to improve comfort and reduce fatigue for the driver and front passenger.