I used to read specs, but I found out, all “neutral” amps sound different. Amps that measure very very well, still sound different and amps with more power, does not necessary, have better control of headphones. So, yes, what is the point of specs? With headphones at least you can see bumps in the frequency response, distortion in the square wave, so you have some idea how it sounds, with amps all of them have flat frequency graphs, extremely low THD, yet they sound different. Are there measurements that should be measured, but isn’t?