; Ford Mustang 4th Gen (SN-95) Original radio options - InCarTec

There are multiple original radio options in the Ford Mustang 4th Gen (SN-95), 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