Can someone please link me to a good thread or external site that explains how to correctly set up the gain etc. on an amp. I have the JL 500/1 that I want to set up. Thanks.

 

I don't know many sites that are going to tell you that (if only it was that easy) but I do know a site that might help you out a bit
Basic Car Audio Electronics

Why don't you post the specs on your sub and maybe someone from here might be able to help you

 

Well I thought I could find just a way to go about and what to test, etc. I found one though, the JL site has a lot of settings for certain setups and also a 9 step process to setting the gain and frequencies and Q and stuff. Thanks.