The treble is so damn smooth you'd think you're drinking the finest craft beer. It's just as smooth as the HD650, but far more articulate and detailed. Extension and air is top notch along with exceptional detail. There is absolutely no hint of glare or strident tones whatsoever. If anything some of the upper frequencies might be a bit diminished, but that's mostly due to beyer's new damping material they added, but it's not as if there's a sharp roll off. More so that the highest frequencies are a bit hush, like you got home and have to be quite lest you wake the youngins.
The midrange is open, detailed, rich, and quite realistic. Where the T90 was a bit subdued or thin, these are up front like a singer in a metal band. Detail in the midrange is quite good and the added warmth adds a bit of an extra sweetness to the sound. Vocals are very good without and harshness, also pretty convincing. Guitars are textured and every pluck of the strings is distinguishable from the last and there is no congestion or muddiness. Bravo beyer!
The bass hits hard when needed and reaches deep with great control and extension. Bass texture is every bit as good as the T90, but now there's more quantity. The bass is never intrusive to the midrange and can be quite powerful depending on the music. An example would be when playing Infected Mushroom, bass notes hit hard and extend down really deep. Then on some older metal, 'Blizzard of Oz' by Ozzy Osbourne, bass is tight and controlled yet still punchy. Kick drums have excellent presence with great weight and slam.
The soundstage is nearly the exact same as the T90. Very wide and deep with excellent laying and imaging. If you've not heard the T90, then think of a DT990 in terms of size. You get a good sense or air around instruments and the imaging is quite accurate. Playing something like 'Symphony in F minor' by Ernst Mielck is really something else. The soundstage with this type of music is very wide and larger than life. Expansive yet coherent. Imaging with large scale operas is really a treat.
The Amiron Home is a massive improvement over the T90 and what a revamp should be. Beyerdynamic fixed all the issues that I had with the T90 (terribly peaky/strident treble, and somewhat thinner sounding midrange, and MOAR BASS). These are exceptional headphone that are nothing like any other beyer headphone. If you could relate them to another headphone, their presentation is like that of the HD650. While not exactly, they have similar characteristics to the HD650.
I am quite happy with them and applaud beyer with this new sound signature they have gone for. If this is how their future Tesla drivers will sound, I will be incredibly happy.
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