Alright. The Failstar has a factory 12" woofer in the rear deck. As with about any Bose car audio it's not that great. I plan on replacing it. Obviously I'd need an IB/free air woofer. Any suggestions?
The only one I found for a decent price is this Fi.
IB312 - Fi Car Audio Store
As said before I'm open to suggestions but need to keep it around the 500RMS mark.