Lots of information
http://www.the12volt.com/
Just about everything basic to advance
http://www.bcae1.com/
how to wire speakers
http://mobile.jlaudio.com/support_pages.php?page_id=141
Trouble Shooting
Checking grounds and alternator
http://www.davidnavone.com/heresHow/august2003.htm
Enclosure Building
Subwoofer enclosures
http://www.the12volt.com/caraudio/boxcalcs.asp
Port size calculations
http://www.carstereo.com/help/Articles.cfm?id=31
Woofer Box Aiming - by Eddie Runner
http://www.installer.com/tech/aiming.html
Sound deadener
Sound deadener tests
http://www.sounddeadenershowdown.com/
How to install: by RAAM audio
http://www.raamaudio.com/cgi-bin/index.cgi
Speaker Enclosures
Fiberglassing, box building, great links
http://www.caraudioforum.com/vbb3/showt ... ?t=135835/
Wiring Diagram
Install Dr. OEM wire diagrams
http://installdr.com/
Under RE-construstion