I have a 2000 Civic Hatch, and I just put in two 12inch Pioneer Premier 800w subs, powered by a JL 500x1 amp. I also have a Pioneer DEH-P840MP (http://pioneerelectronics.com/Pionee...,28912,00.html).

The problem lies in the fact that my hatch rattles a bit. Some of the noise comes from the stock rear wing. In addition, the license plate has a bit of rattle to it as well.

Anyone have any ideas on how i would go about fixing that without buying a crapload of stuff...?

 

Dynamat.

I've also heard that you can put polyfil into the crevices and that will help to fix it... JLaudiofan out here is pretty good about sound deadening... you may want to PM him.