I am just starting to put together my system for my impala ls 03. Now prior to a few months ago I knew absolutley nothing but now i'm starting to understand a little bit but I feel as if i've been bamboozled by my local auto audio shop. they talked me into getting a sealed box and I put 2 15 inch jlw3 d2's which is being pushed by a mmats 1400 watt amp. after listening to my system. it's not that loud, i'm feeling like I should have went with a ported box instead. I want to rattle other peoples cars. everyone tell me what I should do I've already dropped 200 on this crappy box. should I shell out another 300 for a ported one?