Hello gents and genties. I've been owning a pair of Arya SE for ~2 months and i'm gonna try and give a few pointers to those who (just as me) are sensitive to its treble. I'd consider that i've totally tamed them (but with BIG amounts of luck). WARNING - TL

R ahead (sorry for it).
When i first received them, i couldn't wait till i got home so i gave them a listen on what i had on hand: Oppo HA2-SE. My enthusiasm made me ignore the obvious treble harshness and instead, the first thing i noticed was the sub bass. Coming from a pair of LCD-2 Bamboo, i kinda forgot what that was (or sounded like). After 10-15 minutes, though, the treble started taking its toll. I listen to almost every musical genre out there, mood dependent. The second i played Vangelis's Roxane's Veil, i had to lower the volume and stop listening. Too harsh, too peaky for me.
Arrived back home where i had a simple setup, PC->Woo WA6 2nd gen. I had a dedicated sound board with some ESS DAC chips in and i never paid attention to dedicated, desktop DACs. Plugged them in, left the tubes to warm up a bit and after ~30 minutes, started listening. While the harshness was subdued, a bit, it was still there. Couldn't listen to anything that had high "s" in the vocals (Summer Wine, for example). It was ear piercing. Since the sound was passing through the dedicated sound board, which had its own OPA amps, i thought it's time to get a dedicated desktop dac. Something cheap and good. Got an EverSolo Z6 and gave the Arya's another listen. The same, since the Z6 couldn't function as a DAC only and still had the sound go through it's amp stage. The LCD-2's were sounding good, on the same setup but something was off with the entire chain.
I also tried applying EQ (oratory and the likes) with Peace but i still didn't like how it sounded. In my opinion, those EQ's are good, in general, for most people but they are also highly chain dependent. You apply corrections and gains but those were created while listening through a certain chain, which will almost always be different than your own. I gave up on eq-ing (i didn't like it anyway, as i always try to "color" the sound through the chain and not software).
So i ended up ordering a new pair of power tubes while also swapping the rectifier with a different, cheaper one (a russian made one) since i also started noticing some issues with the sound after an hour or so of warming up the tubes. Started searching for R2R dacs, in an attempt to see if i can tame the the blistering brightness of the Aryas (i'm highly sensible to sibilance, shoutiness, resonance, etc - the downs of working in the army, as an artillery retard, thus ignoring its effect on my ears).
Fast forward to 2 weeks, i was ready to press the buy button for an Ares 12th but just before doing that, my wife asked if i still had my old "toy" (she was referring to an Aune T1se 3rd gen). I laughed (nervously, since this is her way of trying to stray me from buying new, expensive equipment) and answered that yes, i do. "Have you tried and see if it makes any difference?" (she's a total stranger when it comes to audio technology but she does try to be the voice of reason, when possible, by asking such questions). Well, it didn't cost me anything to do so and after 1 hour, the new chain was PC (Foo2k) -> Aune T1se (DAC only - which i just discovered that it can do and totally bypass its amp stage) -> Wa6 -> Arya. Back in the day when i had been using the Aune, i did roll a few tubes and in the end, i was lucky to get one that was selling for ~500$ for 25$ (not gonna get into details as this is very much a personal and subjective topic) and stayed with it. Turned everything on and allowed the standard (for me) ~30 minutes of warm-up. To say that my expectations were low is to understate it. I did it so i could get my wife off my back and carry on with the Ares 12th purchase.
Grabbed a cup of coffe, sat at my desk, put the Aryas on and started with the "usual" (a number of songs that i know and listen to for 10-15 years). Gone through a couple of Enigma's tunes, listened to some Infected Mushroom, some classic trance songs and i didn't even realize that all of a sudden, i was enjoying Ville Valo & Natalia Avelon's Summer Wine. As in no harshness, no ear piercing "sssssss"-es, no nothing. While listening, i was also doing some reading so my attention was split, thus not paying attention to how different the songs sound but rather if they bother me or not. I stopped and focused exclusively on the music that was playing. High volumes, no harshness. All of the Arya's characteristics were still there, though. Sub bass extension, separation, etc. I couldn't believe my ears. I kept on listening for around 2 hours then i decided to take a break, go out for a quick 50 km bike stroll and then come back, listen to them through the "old" chain (with the Z6 and older tubes instead of the Aune and afterwards, the Z6 with the new tubes). This time, i allowed for ~1 hours of tube warming up and make no mistake, the treble harshness was back and more angrier than ever. Forced myself to listen for another hour after which i turned everything off and went out to grab a beer (just to make sure that i take a proper break from the fervor that had recently caught me).
When i came back home i swapped everything to the Aune and the new tubes, turned everything on and went to have my dinner after which i also watched a whole episode of a tv series. 2 hours later, i'm at my desk and, again, experiencing the same tamed (warm) sound from the Aryas. Shuffled through most of the "usual" and, again, no discomfort whatsoever. I will admit that i like my music on the warmer side, due to my sensibilities mentioned above so imagine my surprise when everything was, for the first time in almost 2 months, perfect.
I can safely state that no, my ears have not gotten used to the sound of Aryas. If they kept on being bright, i would have kept on avoiding listening to them. Mine is a medical issue and there's no getting used to sibilance, ringing, shoutiness - it gives me terrible headaches and nausea. While before, i could barely muster the strength for ~1 hour of listening to them, here i am now, close to 6 hours (while writing this) and still not even bothered by the sound. The LCD-2's sound incredibly dark on the same chain. So in my case, the resources needed to "tame" these headphones were tubes, wherever they were possible. The DSD1793 with the tube buffer from the Aune combined with the WA6 all contributed to what i can now call a sublime listening experience. Acoustic, vocal, orchestral, pop, rock, trance, psychedelic, etc - they all sound amazing and i can find no faults, whatsoever, to the current setup.
It's amazing how close i was to buying a >1000 Euro DAC just to get the same thing out of a 300$ (tubes for it and the Wa6 included) one (even worse, the Aune was listed for sale on a local platform, since i hadn't used it for ~2 years). Ended up returning the Z6 (awesome device, you really get a LOT for such little money and the build quality was amazing but sadly, it just wasn't for me) as a consequence.
Sorry for the wall of text and here's hoping that this helps at least a few of the Arya owners out there.
Happy auditions!