Sennheiser PX 200 II (How to Read a Frequency Graph)

[lorenzo22]

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.

 

[lorenzo22]

Can any audiophile help me to understand the effects of the dip at 7 kHz?