You know, a great track to try on the Legend X (and I'm sure on the Valkyrie) is Sacrifice by Björk off of Biophilia. Just excellent. Tidal has it in MQA, if you believe in magic, but if you can find a nice modern V0 copy I'm sure you'll be set.
Edit: I realize that's maybe not convincing, so...
* Really interesting instrumentation that covers a large portion of the frequency spectrum. The main bassline is carried by a "sharpsichord", a 2.5-ton acoustic 46-stringed harp played by a pin-cylinder.
* Björk has an incredible, unique voice, which she layers over itself in a way that really tests detail retrieval. It seems to stretch from 200Hz-1k as she pitches it around.
* The layering also tests soundstage openness, because she'll have several vocal tracks in the ~center, while carrying a differently pitched and times one all the way off to the side--kind of like counterpoint, but I dunno jargon too well . You should be able to clearly hear each of them in their respective locations.
* lovely synthy bass that will get your dynamic drivers active. It's not down at 20Hz or anything, but it does a good job of punching.
It's really good!
and because i can’t help myself, it’s good to know i’m not talking out of my ass. here, you can see the sharpsichord being plucked, and you can see that it really does cover the frequency spectrum from bottom to top:
(and the bass is around 60Hz)
Yes, very nice indeed. I agree with all you points listed above. Great vocal tracks layering, interesting sound of that sharpsichord, and the bass parts . I like the bass parts intro especially
Regarding the Legend X - it is too early to judge because I did not like it at start. I mean the sound was ok, but the soundstage - there was something wrong with it. If you can imagine soundstage started from let's say from 9 o'clock (left channel) and ended on max 1 o'clock (right channel). This was really weird. So I gave them a little burning in over the night and day (roughly 18 hours), and now it is really better. I have never experienced such thing. There may something wrong with the right earphone, but definitely it is improving.
Yesterday the guitar in the left channel was really at the 9 o'clock position, but the guitar on the right was rather in front of me (1 o'clock) rather on the right side. Weird. Lets see in a couple of days...