the "burn-in" is adjusting to the fit of your ears. Since our pads and arms have an angle, they need a little time to adjust properly to your ears. Even sweat a bit (esp if black vs grey pads).
The mids will improve significantly like our Response Curves vs top competitors when this is done. I feel the mids is one of M-80s STRONGEST points vs others.
Remember, the mids are the POSITIONING of the angle of the cup/cushions to your concha of the ear.
Edited by valkolton - 7/26/12 at 3:14am