Hello. I've noticed a few new noises that appear to be getting louder by the week. After I drive my car for a while, and then park and turn the engine off, I can hear this popping sound...almost like there are pieces of metal bouncing around inside a metal can.

Also, when I shut my driver's side door, I hear this rattling that continues for about 1-2 seconds after the door is completely shut. It sounds like there is a marble rolling around inside.

Just a non-car related question: How do I test a subwoofer to find out if it is blown or not? I have 2 600W AudioBahn subs, and one has been acting up. I've tried rewiring everything and can't get it to work.

Thanks...

P.S.
Some f@g Honda Prelude owner backed into my beautiful Acura Sunday...$800 repair! DAMN THEM!