Does anyone have this kit installed in their cars? I have a 2004 525i and the sound system is horrible! No bass at all! Did the previous owner swap out the speakers or are they just this dull in base model form? I was wondering if the Rockford Fosgate kit would have good enough bass. My old e420 sounds better than this ahahah

http://www.rockfordfosgate.com/products/details/t3-bmw1