Ok so I took my speed3 07 into the dealer for the second time because I have this Horrible rattling sound coming from the left side door.. which the first time mysteriously couldn't hear. This time I make them sit in the car and I have a song right at a certain base part.. and he hears it loud and clear.. Anyhow turns out on the speed3 GT the sub which is located under the passenger seat has an air intake to the sub woofer directly located right next to the side where coins could fall from someone pocket. Ok there was literally 3 dollars of loose coins in the frakin sub. Great design. I'm going to home depot and puting a piece of wire mesh over it and zip tie it around the intake. Unbelievable