Is there such a thing as a break-in period for speakers?

The reason I ask is that when I first picked up my TSX I thought the audio system sounded shitty. It seemed harsh and very high-frequency dominant (even after playing around with the audio settings). I soon started thinking about changing out my stock speakers as some on this site have. But now, after about a month, it seems that the system sounds much warmer. I don't know if I've grown accustomed to it or what. I'm thinking that the stock speakers, when new, don't have the elasticity to immediately produce the full range of frequencies. Perhaps it has taken a couple of weeks of use to "work in" the speakers, especially in the lower frequencies that require more magnet movement. What do you guys think?

 

yes, especially for tweeter. Brand new tweeter will sound harsh, but after around 40 hours of use it should be better.