Hi, I'm new to the forum. I read many good reviews about the Sennheiser PX 200 II headphones. I found the frequency response graph here (under the tab "Specs"): http://www.headphone.com/headphones/sennheiser-px-200-ii.php I know some dips in the highs are normal, but to be sure I would like to know how to interpret the deep dip at 7 kHz. Do I notice any sort of lacking sound at 7 kHz? Thanks.