I had owned my S60 for about 2 weeks when I noticed that the speaker in the passenger side door wasn't working right(no bass whatsoever). I took it to the dealer last weekend and they said the speaker was frozen and ordered a replacement. I have a 2.4T with the Premium package and also had gotten the $200 upgrade for the 200 watt amp and upgraded speakers. I'm wondering if prehaps my speakers didn't get upgraded but the amp did. Has anyone else had similar problems? Is there a way to tell by looking at the speakers? I've never had this problem before with other cars, and it kind of shocked me. Otherwise, I love the car and it has been perfect.