in theory four sealed should get loyuder than 2 ported, i'd only gian about 6db by porting them, but four sealed i'd gain about 9 or 12db depending on how you figure it, but i think im gonna go go with 3 sealed, now. have 2 firing back and one firing up running at 1.5ohms on my RE12.1 should do around 1000wrms, which is about max i wanna put on my stock alt. another reason for this is cause its goona make a lot harder to steal, right now i have 2 sealed boxes which some1 could pick up and casrry away with one bigazz box you'd need 2 ppl just to pick it up let alone try to steal it.