My dad had a full custom Audio system put in a while ago with focal speakers and a 10 inch sub. 600w for the sub and 600 for all the speakers. The rear d pillar speakers are factory.

the drivers side one just blew out on me and I was wondering if I should just buy a factory replacement or replace both with an aftermarket brand. I’ve seen ones by Harmony and a couple other brands.

 

I replaced the stock 4" ones with Polk Audio . Just use what ever sounds good to you.