Good to hear! I'll try to look for and kill other peaks after I've given my ears some time to rest. Listening to pink noise and pure tones is quite tiring... Both these 7.1 khz and 11 khz peaks are quite nasty, with both gone it truly shows what these takstars are capable of! I have to recable mine.. I'll probably go dual entry, too.
If you'd like, you can try doing that guide for your other headphones and bring the best out of them. I imagine all your headphone list is in need of this treatment
To put it in more understandable terms... you only have to use that sinegen program to listen for the peaks in a sine sweep, once your ears tell you where they are, you have to take note of the center of the peak (where it's the loudest), that's where I've come up with the 7100 and 11000 hz marks. Once you have that data, you go to your parametric EQ and set the points at those marks, and start playing with the amplitude and gain... You do that while listening to a pink noise sample, the -9 dB and 0.3 come out of that, with these settings I found that the peak at 7100 hz was gone. Rinse and repeat... That's how you EQ your headphones... most of the time the treble is in need of some tweaking, and it does wonders.
Cute, how would you rate the 2050s after the EQ, in comparison with your HD600/580s? I've never heard the flagship senns (Only the PX100 and HD202, and I think the PX100 is another little wonder) and I'd like to know if we're near that kind of sound quality or if there's more to tweak...