**Then you have a great deal to learn.
I am neither the original poster, nor a top poster. Go away and learn how to use your newsreader, then come back to us.
I suggest you do some actual research, before making a complete fool of yourself next time.
BTW: You have still not managed to answer my question. Be as technical as you feel necessary. In your answer, you may care to examine the impedance characteristics of headphones and relate what might happen to the frequency response, when driven by different impedance sources.