Killer, the scoop is that tweeters cycle thousands of times and woofers hundreds of times in the very first second of operation. Any permanent change occurs very quickly, most likely in testing before the speakers leave the factory.

It may be, if the rather extravagant "night and day" language represents your actual listening impressions, that you simply prefer the sound of the JM Labs speakers to that of the M3s.

-----------------------------------

Enjoy the music, not the equipment.