dual 15 inch ported speaker box design, please help!

[bigaltexas]

okay.

i got 2 15 fi bl subs.

i used to have a box for 2 twelves and it beat okay, then i got a different box and it slammed wayyy harder. so really. im already pushing these 2 subs to their limit with a 4500 watt amp, but i still want more sound. so i guess its a new box im needing.

so, could anyone give me a link to the best, loudest, hardest hitting box design with dimensions etc for my 2 15 inch fi bl subwoofers. and also, on the fi website, for the 15 bl, it says ported specs, is 3-5 cft, so... im guessing it should be 6-10 overall. it also has to fit in the back of my silverado ext cab. i removed the back seat so it does have a good little bit of room back there.

whatever will be the loudest, hardest hitting, skull bashing, eye ball rattling box design... i want it.

and any modification tips that would make the box evennn louder!

thanks yall. and please helpppp

[bassl0va]

What's the box you have at the moment like? I might be able to help.

[Boon]

New amp.

You have a Quantum QCA4500D right? 4500w = more like 800w.