Hi, I need some help and advice. I recently purchased a 2002 S3 and want to upgrade the sound system but need a couple of pointer. Basically it has a standard headunit with a 6disk changer build into the dash. It also has a tape player and because of this i want to keep the HU as standard. However as your all aware, the standard speakers are dire, with no mid/low bass what so ever. I was wondering if it were possible to leave the existing headunit but either upgrade the door speakers and put a small 10" 800w sub in or should i just leave the door speakers and install some 6x9's with a nice sub and amp? Leaving the head unit wont distort the sound as long as i use an amp right? Any help on the above would be much appreciated!!