just here to clear up some misconceptions some people may have about the stats or whatever. On my phone so I can't type a long ass comprehensive paragraph but
Concerning frequency (not gonna bother with the other things now) the important thing to note is the /response/ if you wanna do some true comparisons. The (bass)-to-(treble) numbers is the /range/. Pretty much any pair of headphones you get that you don't spend $5 on at a walmart will be 20-20k or better/around that.
The response is measured graphically, and generally speaking, a flatter response is better. I'm sure op knew this already but just wanted to inform the other peeps k bye