Quote Originally Posted by Snake Plissken
"If you port your subs, tuned to about 30-32 hz, and open up the rear deck, you'll notice a huge difference in the bass."

But what if I didnt want to alter anything regarding the rear deck or seats, etc....would the ported box STILL make a difference in what is getting into the cabin with seats up, sealed trunk, etc?

Try wiring the subs correctly first, maybe the out put will increas to where you want it. Then try porting them, that will also increase output. If it's still not enough, you need to with upgrade your subs, or open up the rear deck.