I've tried to use my warranty before.. to claim on the rattling noise inside both front doors if I turn on the music with some quite bass, very noticeable.. they still insist due to the limitation of the standard speakers, which it is obvious to be some sort of metal noise. Tried 2 times to claim with no result.

Solution: Open your door panel, try to play around with electrical tape to cover area that 'loose'. Add up with a descent sound deadening.. and you should be alright.. but I still get rattling noise tho.. since my door panel can't sealed properly now.. speaker hit the panels.. LOL...