If it were the Utopias, your cat would freak the f**k out with that Beryllium! 
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Doesnāt need to be higher than 20khz frequencies. My cat is interested by some sounds above 10khz too.
Also, pitch shifting, when it sounds a bit like meowing. Like guitars and tremolos/floyd roses lol.
I donāt know about Beryllium or magnesium, but somewhere, thereās a picture of Zeosās cat interested by the Buchardts speakers. 
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yeah, ive tested myself and my hearing cuts off at maybe 14k absolute max.
Really?! How old are you?
34 years old.
Youāre a youngster. You must have exposed yourself to really loud music often.
well i try to be a lot more careful these days, but yeah younger, I didnāt careā¦
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Hearing and backās, how I wish Iād listened to my Mother warning me about the consequencesā¦
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My cats generally just ignore everything now, they really donāt seem to mind
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I had a conversation recently with someone in the industry and we were discussing sonic preferences/ calibration curves, and the gist of it was that it does seem that younger listeners lean towards the Harmon target (curve) while older listeners prefer the Diffuse Field target.
My take was that older āaudiophilesā, basically the ones with disposable income, prefer the brighter Diffuse target because they canāt hear as well as younger ears. I speculated that itās the reason manufacturers TOTL models are always ābrightā, or in less offensive terms, resolving in the upper registers.
They didnāt disagree. 
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That does make a fair amount of sense. lol
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Iām treble-sensitive and can hear 18khz. So they save me money. 
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I think itās probably simpler than that, the vast majority of TOTL headphones arenāt sold to audiophiles, theyāre fashion statements, or jewelry. And people who donāt listen critically conflate bright and resolving.
Iām in my 50ās, and I canāt tolerate bright sounding gear, but I do have āexceptional hearingā for my age according to to my hearing specialist and I have some moderate tinnitus that tends to make higher frequencies irritating.
Maybe Iām searching for ābit-perfect audioā and accuracy everywhere because Iāve done a lot of electronic music with studio, āneutralā headphones and doing stupid, perfectionist things like āyeah, this snare would sound better with 1dB more volumeāā¦ and not caring about mastering or testing with anything else, like everyone else does, lol.
Also, ātrue to the exact specifications of the file and itās frequency outputsā is impressive to meā¦ thatās also just the simplest way to be damn sure a DAC is doing its job well.
Iāll get ācolorfulā headphones if my DAC is too āsterileā. 
Typically when you are mixing or tracking you donāt really think about mastering, you are trying to achieve a specific sound. Mastering is just the final touches and that can either be a very important step or a somewhat insignificant step that is commonly just combined into the mixing process.
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if youāre talking about pure frequency response, then i think most DACs, even R2Rs are going to straight up give you a āflatā response. I think the ARES 2 in itās NOS mode will have some drop off in the highs, but itās typically meant to run in itās OS modeā¦ where it would measure well enough to pass all the ASR Tests, Iām sure. I think as far as DACs go, then you are probably fine with just the D50, but you could probably get something a lot more transparent and delineating if you really wanted to spend the money.
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Itās really the harmonics and time stuff that r2r messes with tbh, although some r2r are purposely colored (although I donāt really know for sure lol)
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no, have not heard them. I saw Joshās review of them and he wasnāt too fond of them.