Looking through various headphone measurements, it seems like a lot of headphones have a peak in the 8-10 kHz range. The recently introduced Harman response curve does not incorporate such a peak, and none of the speakers that I've listened to had this peak. So why is it in so many headphones?

So the right channel on my ATH-M50's died last night during an online gaming session...guess my sweaty ears finally did them in. The heat and humidity so far this summer has been brutal, plus I tend to sweat more than the average person, which resulted in me constantly having to take off my...