Picking a Sub for fiberglass enclosure... Help!

[tloud_131]

Hey guys, first time using the forums. I just bought a 2010 Infiniti G37S with an existing air bag system (Thats why im doing fiberglass). I've already started one of my fiberglass enclosures in the corner of the trunk but I cant decide what subwoofers to get and which would sound the best. The issue is that I cant calculate in the box volume until I choose the subwoofer! Backwards right? I have to pick the subwoofer to build the second half of the enclosure. I'm going for more of a SQ setup and I'm looking at the Rockford Fosgate P2D4-8 (two of them). So my question is; does the box volume matter THAT much for a entry level SQ setup? and which drivers would you recommend for a budget friendly build? All of the woofers I'm looking at are around $100 each btw  

 

[fmedina]

if you want it to sound good then yes, volume does matter. especially if youre going for an sq set up. and it seems like youre looking for 8s?  cant go wrong with rockford  fosgate tho

[tloud_131]

Looking at 8's possibly 10's. My local shop let me test fit a fosgate P3 10 and it fit with little room to spare. I guess I have to decide which size to get, finish the box and hope for the best volume wise?