The Jaguar XJ features an optional Bowers & Wilkins 1200W surround sound system with 20 speakers calibrated by engineers responsible for some of the speakers at Abbey Road Studios. However, in common with several other premium vehicle brands, such as Aston Martin, BMW and Mercedes-Benz, Jaguar has used sound systems from Japanese car audio and navigation systems manufacturer, Alpine.
According to Test Driven, the Jaguar Alpine Premium in-car entertainment sound featured a 12-speaker system.
320 watt amplifier
The system's 320-watt amplifier is more than enough for any car but considerably less wattage than either of the options Jaguar offers today.
Other Features - XJR and Vanden Plas
The 2004 system fitted in the XJR and Vanden Plas had digital sound processing and subwoofers as well as a remote six disc CD auto-changer, according to automobile electrical and electronic systems expert Tom Denton.
Other Features - XJ8
The standard sound system on the XJ8 had eight speakers, a single-slot CD and radio with RDS and automatic volume control. The system was pre-wired for the six-disc CD auto-changer but this was not included as standard.