So ive had my system (pics later) installed for a week and like a quarter of the songs i listen to have bad rattles from the sub around the rear speaker area and the panel behind it....i dynamatted the immediate stock sub location but nothing else, would i have less rattles if i faced the sub down instead of up (some people have done it down)...and also should i dynamat that rear speaker panel area?.....

 

Dynamatt the whole area. Everything. See if the hardward is rattling too. If so, you can apply a quick-dry silicone spray which will freeze the rattle. Face it up. I believe it has a passive
woofer on it also, right? My friend did this and has no rattles.
He cranks it too.

 

I agree with the above, but I would add the following:

Ok, look at the hump where the rear speakers are. The front and top are one piece that is held on with 4 clips. The back is another piece that is held on by 3 clips. These two pieces also snap to one another. Further more, each plastic piece has little legs that keep it in position, but do not clip to the metal. Because these two pieces are barely held on and have little legs that touch the metal body, they vibrate a lot. And I mean a lot. Furthermore, there are little ports from the stock sub location and stock rear speaker location that point at these pieces. Hence, the sound can really move them.

The solution. Remove the quarter panel plastic pieces that start at the seat belts and go over the hump. Remove the panel for the glove box and sub compartment (watch out for the DC outlet and glove box door). Remove the plastic piece over the hump. Remove the "back of hump" piece as well as the 5 clips holding the base. Dinamat the entire hump. Place small pieces of dynamat on the hump cover. Place small pieces of dynamat on the "back of hump" piece. Reassemble.

Problem solved, trust me. I just finished a full dynamat (actually B-Quiet) of my car. It was well worth it as I will be adding a Basslink shortly. Hope this helps.

 

I face down, lots of dynamat, very few rattles.

 

Mine faces down. I insulated under all of the plastic posts that rest on the metal, inside the sub compartment, and the floor of the upper area where the speakers are. Have yet to hear a rattle from there...Only my dash and brake light rattle and that ain't from the bass.