Excellent, so your ears tell you the tweeter is not good. That's fine. But please don't claim the measurements will provide some sort of legitimacy to your ears, as they clearly don't, as I have showed.
The graphs I posted are called "Deviation from linearity @ 95dB", which, to me, describes perfectly the situation you mentioned, that the tweeter would, at high volumes, break from linearity. As the graphs show, both speakers deviate just as much in the high frequencies, but again, the YGs are a much older project, and the tweeter is not the same as current production.
In the future, also refrain from implying I "played". I posted the link where I got the two graphs, which is way more than you did. Anybody could go to the links I provided and see the graphs. If you download each individual graph to your computer, you'll see they're EXACTLY the same file/size as I posted, which I did for convenience. The YG graph is smaller because the review is so damn old that back then people used dial-up modem or something... Please, do not imply I'm dishonest, as that's hurtful, while all I'm trying to do is bring forth information.
As I said, personal experiences are fine, but you came in here and claimed graphs would show something, while they clearly don't. I'm not upset because you don't like YG, I'm upset because you branded me as dishonest, and I'm sure nobody would like that.
Be well,
Alex
The measurements of “linearly deviation” you are showing are typical of tweeters without ferrofluid. They have no correlation to listening fatigue the way THD do, they simply show that these tweeters don’t keep up with the rest of the speaker at high SPL (not a great thing but a decent compromise, as ferrofluid “slow down” the tweeters and sound awful). Magico S5 measurements on Sound Stage are overall some of the best they ever took, and Yg, unfortunately, are some of the worst. There is much more to a loudspeaker then flat on-axis response, Yg new design may be better, but no matter how hard I looked, I could not find any current THD measurements on them.