Beryllium tweeters are harsh. I learned that the hard way. Ribbon tweeters can be much kinder (or AMT or soft dome). There are many factors at work. Nuanced discussion here.
Sopra No 2's or other alternatives?
Have listened several times to Sopra 2's and while I do like them at times they come across a bit bright. Also bass was not as controlled as expected. Don't know what was causing this but can this community give me other alternatives? They will be mated with SS gear for the time.