Aperion just sent me an email that states:
"3) Speaker Break-In. Your speakers should sound great right out of the box.
But once they’ve been played for 50 100 hours (doesn’t matter what kind of music you use) they will start to sound more natural and balanced. This is known as break-in and is completely normal."
I do not believe in this at all, that is a Myth as many that have hundreds of years in the business will tell you that speaker break-in is not required.
My quote is "They are how they sound" -- if you like them, keep them, if not buy another speaker. The sound is not going to change after 50 or 100 hrs. at all, no way Jose!