Report Denon D-5000 in Headphones Posted July 16, 2011 I thought burn-in always improved how headphones sound, you must not have done the burn-in properly. With all due respect, I find that notion weird. If "buying headphone, using it to listen to music" is not how you use a headphone properly, then maybe they should include an instructions manual saying "Make sure you burn them with white/pink/brown noise for 100 hours before using or else they'll sound bad after some months" or, even better, do the procedure before shipping. I used a proper amplifier for its low-impedance and took utmost care of the equipment over the course of the time I owned it, because these are definitely not cheap cans. Anyway, I didn't "burn-in" as a method, I simply used the headphones. My only point is that the headphones got worse (to me) over time (to the point where its drawbacks became exactly the ones people complain about).