need a new pair of monitors: how to tell if a car has quality speakers?

need a new pair of monitors: how to tell if a car has quality speakers?

 

I'm into producing music and I need for a new pair of monitors so I figured I would go to an auto junkyard to take some speakers out of a car. The problem is I have no idea how to tell if a car has quality speakers and what I need to do to get them to run off of my laptop at home- advice please? Thanks!