I want to add a sub in my '02, I already have a descent Pioneer system but would like to have a low profile sub for myself, not for the entire neighborhood. I like the OEM design that kept it low profile so should I just purchase that panel and add my own speaker, or should I design my own or find a third party panel if it exist? and further what type of speaker/amp should I use, does the OEM design house an amp inside of it?

Thanks people.