Mmm. I think the HD650 being fatiguing comment had to do that I had been listening to a lot of music that was not very dynamic. Listening to something like Godspeed You Black Emperor or Pink Floyd's Meddle was not really fatiguing. Listening to death metal like Misery Index was. Do you not find listening to consistently loud recordings through the Q701 to be fatiguing? Just curious. Going back to my days of being in percussion ensemble and drum corps.. That probably isn't helping. My ears, in general, seem to grow weary of constant loudness quickly. Let me throw on something a little more mellow after dinner.