Hi guys, first off let it be known that I know absolutely nothing about audio components, so I cant even start shopping and piecing together an audio setup. Here are my questions that I hope you all can help with.

I wanted to buy this and I'm curious if it'll work with my stock speakers.
http://www.amazon.com/Pioneer-AVH-P4.../dp/B001604QGW

and I'm wondering what sub woofer is good enough to get a good thump through out my vehicle. If its a 10 inch what amp is good? How do amps work? What is better, two 10 inchers, or one 12? If anyone could piece together a decent audio setup for me that'd be great. I'm pretty set on that Pioneer though. Any input is truly appreciated.

Best,
Carlos

Happy Thanksgiving.