My harx700's have been making a little humming noise during music and when I stop the music the noise stops also. I just noticed this a day ago and I've had the headphones for a week. Will this go away or am I stuck with it?

Today I got my headphones and seemed great at first when I did the stuff mod. I then did the removing mod and to me the headphones seem too shrill at times.will this problem go away after burning it in or am I stuck with it?

Today I got my headphones and seemed great at first when I did the stuff mod. I then did the removing mod and to me the headphones seem too shrill at times.will this problem go away after burning it in or am I stuck with it?