A dream comes true
First, let me say that if was a dream to own an electrostatic phone that gives very accurate tonality to acoustic instruments. Unfortunately my budget is always very limited. So, I cannot simply dare to think to buy a stax set since they are so expensive for my pocket. So, for me, the only thing about an electrostatic headphone was a long breath - some day I will earn more money and then I might be able to afford a good es can.
When I first saw Koss in MD for the first time, my initial impression was that it cannot be a really good one although the fundamental technology is the best one. I also read many criticism about it. But, what I found later that some well reputed people from audiophile community praised it. And I understand that it is almost impossible to find a can that is great for all genre. So, I mainly require a good can with lowest possible distortion to get the highest quality tonality. When I found Koss's price is dropped, there was no way for me to escape and not to click the two buttons.
I don't think I'm an expert for this level of sound. So, I prefer to say it is my impression about the Koss ESP/95X system.
The most engaging factor is the MID reproduction. It is so so transparent that I cannot imagine anything between my ears and the real instrument or the voice. LOW is there with good enough but not that impressive and that actually helps. Because my focus to most of the acoustic instruments and vocals are not getting distracted by overwhelming LOW dynamics. My ear is not so good for hearing more than 16k. But until that point HIGHs seems to be smooth enough. So, nothing is too bright. But I think HIGH MID is just perfectly sharp. Well, frankly telling, only thing I sometimes miss is dynamic bass but I have HD 58X for that. Soundstage is good but I was expecting a bit more. Imaging is just enough; instrument placement depth and location can be easily identified.
But it is true that when I play compressed music or Spotify best quality, it is not that impressive. But it is spectacular with DSD on my FiiO M9. ifi xDSD also produces natural sound but M9 is more enjoyable with this system.
About build quality, I am happy that it is very light and looks more mainstream (unlike some Stax can). But one complaint is that it does not even include a soft pouch. It is an expensive and sophisticated product. I am afraid dust can easily enter through the open outer shell and can degrade sound quality. If I use it almost everyday, I cannot keep it in a air tight package.
About the energizer, I don't understand why someone need separate left and right volume knob. I just balance it by the marks but I don't know if it is the correct way. Sometimes, I am getting some "hum" noise but it is not always. Anyway, I'm not ready for sending the system back from Japan to USA just for this hums and it happens only at 5% or less the time and it is tolerable.
At last, I just want to say that it is an unbelievable sound system for $400. It was my dream to own a can that can reproduce accurate tone of an instrument. This Koss gives me full satisfaction on that issue and I'm so glad I didn't hesitate this time. Thanks Drop community for such an amazing system with this price drop.
Would recommend to a friend.