the two 12's I got arent really that loud but instead of letting them sit in my back seat I was going to put them underneath the back seats in a custom box. If I put them under there, is it going to affect the sound quality to where they wont hit as hard in my truck or will it not make a difference?

 

if the box is the right size, it shouldnt change anything

 

since the woofers are going to be down firing and probably into a nice layer of carpet it will sound a bit muffled, but you won't really notice it if the rest of your system is setup right.

 

do you know if they sound better firing down or up? and I actually got that rubber line x cover for carpet instead of actual carpet.

 

downfire is typically better. the sound resonates before it gets to your ears

 

plus there's less junk the sound will get absorbed by and it's easier to make room for a down firing sub to move.

 

From my experiences, Downfiring is louder and sounds better in a newer model Screw.

 

ive got down firing 2 12s in my 03 screw and they get pretty loud, and they arent even that good of a sub