I don't think you can break in the cone area, there's simply no electric current or any type of signal being flow through them, It's even more unbelievable to break in those paper cone speakers. However, the voicecoil might be able to "break in" for a very short period of time but I have yet to hear any difference in any speakers I've own in the last two decades. Not that I do not believe breaking in, just that speakers is not one of them.