I never fully understood this need for fat burn-in. I do think that burn-in is good for headphones to get better with time (my AKG701 got remarkably better after a few hours at moderate levels). But the good thing about it is feeling the improvement, isn't it? What's good about blindly plugging your headphones in some source for pink noise, and just wait 100 hours?
I on the contrary think that "active burn-in" is much more enjoyable and teaches you a lot about the difference in sound and makes you understand and appreciate the details in sound. In other words, just plug you headphones in and enjoy your music. You'll burn-in with your headphones.