I am guessing (if the K601 graph is indeed similar to the K612) that this is the larger peaks between 5-8 kHz on the K702, and also seems to be attributable to the pads.

K612 | DIY-Audio-Heaven K612 | DIY-Audio-Heaven

First there is the detachable cable – and I’ve always liked the mini XLR set-up on the K702/Q701 etc. In a few, special instances, it does, but that probably goes without saying and is not an accomplishment.I tried the angled 702 pads on the K612 – and the impression I got was a slight increase in both air and treble. So if you don't have a suitable amp, you should factor in the cost of one if you decide to purchase the K612 Pro. is not a basshead can by any means, but this is one of my top recommendations for EDM and many modern bass heavy genres, because this can render deepest low notes with exceptional texture.

AKG K612PRO Open-Back Over-Ear Premium Reference Studio

The ear pads are comfortable but the head band caused me to have scalp pain for several hours after use. I stopped listening to music regularly and for a long time I didn't realize that the X1 was to blame!Le casque d'écoute Akg 612 Pro est bien confortable, a une très bonne qualité sonore et viens à un bon prix, cependant le seul défaut du casque est la soudure de l'oreille gauche, qui sur deux casques (le premier étant retournéà cause du problème) on simplement laché. they do very well with all my music: particularly they are fantastic with black eyed peas and alicia keys ( quality of bass and voices is fantastic !

AKG K712PRO Open-Back, Over-Ear Premium Reference Class AKG K712PRO Open-Back, Over-Ear Premium Reference Class

Especially with live master tracks on tidal Jesus if I didn't have the hd600s or m1060s I'd daily drive these in a heartbeat and that's saying something! It has allowed me to learn a lot about my own preferences, and also allowed me to spend considerable time with some good, some great, and some not-so-good cans.I tend toward cans that are relatively neutral and balanced - with a slight emphasis on the mid-range. The 100 Hz to 3 kHz stays within 2dB, and the increase in higher frequencies reaches only a relatively moderate 5dB, beating one of its main rivals Beyerdynamic DT 880 Pro. But be warned, this is not an easy headphone you can drive without an amp, you must use a decent amp/dac to get he most out of this, I found 612pro is harder to drive than DT150, dt770. I have had fairly good results with damping the treble on some headphones using felt in front of the driver and it appears as though this headphone reacts well to this treatment as well. If you like a slightly more expansive stage – with a crisper detail oriented signature – the K702 will be better for you.