Report 2003 STS Bose system-low bass in Cadillac Deville, Eldorado, Seville, Fleetwood, Sixty Special Posted October 1, 2009 My 98' STS always seemed to have "low bass" as well. My current 01' STS with the same system seems to have much more bass than 98' did. The system is definetly not tuned for huge "rap bass" and I am personally glad it's not. I agree....crank up the bass and crank it up. We should also remember that it is a BOSE system and the speakers are still paper cone and ruber coil to save cost.