bro howie, my satria neo stock HU is already good for me as i'm not really an audiophile. my complaint is the rattling sound from the front speaker when i crank up the volume~ can sound dampening resolves this issue? it feels like the trims on the door is a bit longgar thus will vibrate when i crank up the volume... please advice~ and let say if i want to upgrade ICE later, do i need to redo the sound dampening? i mean, do i have to buy new mat?