Subwoofer: again

[acrylucs]

I posted a while ago about my subwoofer rattling. I have the 7 speaker system that came from the factory, 2005. When the base goes up, it vibrates like nuts. and sometimes when its not really loud. some people said tighten screws, but the only possible screw is inside the panel. I have no idea how to tighten any screws and i dont know if it would help. i had some tape to try and put pressure on it to stop the vibration, but no dice.

So, anyone experience this issue? i searched matrixowners.com no dice.
thanks guys

[Frank@toronto]

Where is it rattleling from? Doors, floor, front dash ?

[acrylucs]

Oh sorry, its coming from the trunk where the subwoofer is installed inside a panel.