Recently, maybe I've never noticed before, I noticed my MP3 input jack only provides right signal through my headphone on HD500. I checked my cable, iPod, and headphone and they work fine as they should. But when iPod is plugged into CD/MP3 jack, I only hear my jam track through my right ear. While I hear my guitar both right and left, I hear my jam track on my right ear only. Left signal is really really faint. Is this how it supposed to be or can I change my configuration on HD500?
Thanks for your help.