The Premium system comes with the XLT, XL and SSV. It is the base system with 160 watts. It may have the single CD radio or the 6 CD radio and may be equipped with optional satellite receiver. There are six speakers - 4 door speakers of 25 watts each and two tweeters on the front doors.
There is no subwoofer and may not have steering wheel radio controls. There is no harness for the subwoofer of steering wheel controls although the clockspring and the steering wheel can accommodate them.
Higher trim levels (Limited, Eddie Bauer, King Ranch, XLT Premium) have the Audiophile system with 360 watts, 50 watt speakers with added subwoofer and external 80 watt subwoofer amp. They all have steering wheel controls.
GPS navigation is only available on the higher trim level cars and all navigation equipped cars have the audiophile speaker setup.