Junk but loud (JBL) are OK for the money, far better than sony, iv got Focal in the front of mine and they are super sweet but cost £Â£Ã‚£, iv got some junk but louds which i think im gonna put in the back doors, they are brand new and only cost me a tenner and ill be honest they are alot better than the last jbls i had which was 1995.
btw when i say "junk but loud", thats the name we have for the brands night club speakers, not putting down their car audio line tho, like i say for the money they are ok

also upgrading the head unit will give u a better sound...