Hello there!
I went back to reading reviews on these Bose QuietComfort2 headphones I bought a week or so ago. And so, I’ve noticed that people sometimes speak of “burning-in” their headphones. In the case of the Bose QC2s, one reviewer said it takes at least 120-hours to burn them in before they really start sounding great.
I would like to know if any of you audiophiles know what these folks are talking about? But mostly (because I kinda think I know about what they mean) I’d like to know if you think I can expect a BIG improvement after I’ve used them for a while? Right now they sound nice but if they’re going to sound great as time passes then that’ll be something to look forward to. I hope I’ll be able to tell the difference. 
As always, I think you for your time and thoughts!