do speakers have to "break in"?

most coaxials have a softer "surround" so they can react to music faster, so no break in period. Some subs have a break in period of 10-20 hours to "loosen" up. I dont know it if its true or not, but most of our reps that sell us merchandise all have the "story":shrug:

Your dash speaker sound worse becaue they are too small and probably being overdriven.