I've had the car for a week now and recall when I first got it, that the sound system could handle just about anything without ANY distortion or rattling. I'm not sure if I'm dreaming, but it appears as if there is a rattle or vibration coming from the rear when the bass hits hard. Like something has come loose. Does anybody have the same problem? I swear when I first got it was able to handle all the bass I could throw at it without a sweat. And i'm not even talking about playing it at full blast - maybe half volume.