Arya does lean bright, but it's not sibilant. The 6XX isn't sibilant or bright. A90 is as neutral as amps get, it is neither bright nor sibilant. You could call A90 "analytical", but that's not the same thing as sibilant, typically when people call an amp "analytical" what they mean is it's not warm and rolled off.guys I have a question
I paired hifiman arya with A90/D90 and I find it to be harsh in many recordong and sibilant so a lot of people told me it is the amp and other people told me no it is the headphone so I bought sennhieser 6xx and a lot of people said it consider warm and highs turned off in it but I face the same problem with 6xx it is sibilant not forgiving in many vocal recordings iam really confused now I think it is really the amp dac thing.
What Arya *IS* is exceedingly honest. If you are listening to bright sibilant recordings, that's exactly what Arya is going to show you - she's not going to sugar coat it. Same goes for A90 - it's not going to "soften" a bad recording. Also, it's possible you just prefer a dark sound signature? Some people are especially sensitive to treble and prefer a darker tonality.