just got the brand new pioneer head unit (deh-p7600mp) and it is awesome. It puts out so much bass with the internal amp, that it made all the doors and back deck rattle badly? I know theres dynamat, but is that the best way to stop the rattling?

 

dynamat works or for a cheaper solution (not neccisarly a better solution) you can get tar paper from a hardware store (homedepot, lowes, etc..) it looks almost like dynamat without the nice silver coating, works almost as well, but is 10 times cheaper..

if there stock speakers then just turn down the base a little, it made be the speaker itself rattling not the stuff around it. turning down the bass will always help