I have the Aron Closed X, and they are very good, but the Z1R is better in basically every way. I would be surprised if you disliked them. Congrats!
I liked the Clears, but they were not a relaxing listen, and being open meant I used them less. I sold them some time ago. The Aeons I found way too claustrophobic, and they tended to distort. This was the Aeon first gen though, they have improved drastically. The Shure's have a nice signature though.
Do you recall which tracks you were listening to? I've never heard that either.
It was with most tracks (pop rock, jazz, etc. especially with female vocal), not just one or two. Less obvious with pure instrumental or classical. With today's iem tuning trends, some people may have been used to many iems with elevated 8k-10k region so are less sensitive to a 10k peak. I however had many years of speakers experiences before started on headphones/iems. Speakers are rarely tuned with that kind of peaks in treble.
I think it's better to check by serial number. I have 13417.
Well there is no official statement from Sony that confirms the existince of any revisions
You need to change your cable and your 10K peak will magically disappear..
I can't say what it is. Maybe individual copies are different from each other. Maybe it depends on the gear. I didn't make measurements. My unit sounds bit different than the one at my local dealer. But there was different gear and Sony seemed very sharp. It's not on my system. I am satisfied with RME ADI-2.
