Here's my personal opinion on breaking in periods. When you buy a new car, the owner's manual says to break it in for a certain # of miles. If the manual for your speakers doesn't say anything about a break in period, you shouldn't need one. I know none of my speakers sounded any better after a period of time. WEll, maybe a little better, but they definitely didn't "shine". With Klipsch, you should be able to pull them rightt out of the box, and let em rock. Once again, this is just my personal opinion.