Dynamat?

Hello,
I recently put a system in my car but my sub makes the trunk vibrate a little when its on. Its not really bad but it bothers me (sounds cheap). I have heard that once you find your problem dynamat installed in the trunk helps and also improves sound. Is this true? Can I easily install it myself? Tips? Are there any other products that work well? Thank you.

Yes, any sound-deadening (like Dynamat, B-quiet, etc.) will fix any rattles as well as reducing panel resonance and reduce road noise.
It truly helps & improves sound. You can install it yourself if you have the right tools (ie. rolling pad...). Tips: Follow instructions! :D

Dynamat works great i have it in my trunk... it kills all the rattling... here's a Ghetto Trick.... take a peice of Sponge use double sided tape.. and place it behind u're Liecense plate to kill the rattling there... jus a small peice should do the trick... hehehehe..

lol... that's awesome.. i was hoping i wasn't the only one who used a sponge for that .. lol... that's great