; Volvo S80 (2nd Gen) Original radio options - InCarTec

There are multiple original radio options in the Volvo S80 (2nd Gen), which option is the original fitted system?

Enclosed Subwoofers/ Drivers Enclosed Subwoofers/ Drivers
Extra Slim Subwoofers Extra Slim Subwoofers
Spare Wheel Subwoofers Spare Wheel Subwoofers
Underseat Subwoofers Underseat Subwoofers