My beloved X2HR's suspension band wore out (5 years of daily use) and while I was poking around on amazon to order a replacement pair I saw the Porta Pro's were on sale (prime day or somesuch) so I bought a pair when I ordered the X2HR's and they are impressive. Warmer than the X2HR's they do bring some bass lol, but fun to rock out to some Priest with.
Honestly if I had of known they were this good (I mean I had seen posts and videos but never owned any Koss stuff) I probably would of skipped replacing my X2HR's and saved the money hehe. More comfortable than I would of thought as well. The last pair of on ears I had were probably from a walkman or discman and I remember those being itchy as hell but the stock pads were ok and the yaxi ones were even better. Kind of want to try some of their other less dark headphones now (KPH40 or KSC75's maybe at some point).