2 15 lightning audio subs

Don't kid yourself.  It's a learning curve but an enjoyable one when you arm yourself with the knowledge and support to get through the steps.  Break your project down into separate processes, and figure out one problem at a time.  Start with what you absolutely know you are going to use...if it's the subs, begin by measuring the space in your vehicle where these will be installed.  You need to define the maximum size and dimensions.

Eh?