....So I am not crazy, I was afraid a few seconds tho after reading the 2 previous answers lol...
Sorry to disappoint you, Melissiah...
...But (as I'm sure your girlfriend will testify) nearly all the fanatics who appear in this forum are
crazy. (Just not necessarily in the way you meant.)
Another problem we all share is the difficulty we have when trying to actually describe a particular sound, be that sound loved or hated.
Like you, I don't think I'm "talking myself into it", as my Focal monitors and HD25 headsets do
both seem to reveal an unusual (and unpleasant) harmonically distorted "ringing" that's evident on each transient peak
from the 20 second "mark" to the end of your sample.
I believe that it's unlikely to be any sort of thermionic valve-induced "microphonics", so "tube swapping" is equally unlikely to effect a "cure".
My guess (and sadly, it must be only a "guess", at this stage) is that the lovely, open, top-end transparency that's evident in all of Reinhold Bogner's (and incidentally also in Hughes & Kettner's) designs may have revealed something that's "harmonically nasty" to be going on in the connection
from your instruments to the input of your amp.
So, rather than "tube swapping", a "one at a time" swapping of every single component that's in the path from instrument to amp would seem to be worth trying, even if that's only a single cable
... It sounds "nuts", but I have
had an absolutely top-quality cable
start to affect sound in a manner very like this after years of perfect service, only to sound perfect again after having been left back at base for a few months. ...Aargh !!!
Re-introduced to life on the road, the weirdness returned.
Turned out to be moisture related ! Tiny road-related "nicks" and punctures in the jacket had allowed moisture to penetrate, giving that cable a unique inductive, resistive and capacitive profile.