Fake, I'm in your same shoes right now. Exactly same situation. I just put in a 2 10's yesterday and it's crazy loud and my car rattles. Part of what I need to do is put a sponge behind my license plate. I'm interested to what others have done also. Even with the amp turned down it rattles.
I hear ya.. The only things that seem to vibrate right now is my rear view mirror and the trunk lid. If I push on the trunk lid, the vibrating sound stops. sonicelectronix has a 9.99 dynamat kit for the license plate. lol.
I'm just wondering if doing the top trunk lid will be enough since the vibrating stops when I push down on it? Dynamat Sound Dampening | Car Speaker Installation & Accessories | Car Audio/Video Installation & Accessories | Car Audio, Video & GPS at Sonic Electronix