I say this as a POSITIVE comment for the headphones: I have owned dozens of mid-to-high fi quality headphones from Sony to Grado GS3000, and these might have been the best I've ever heard. I won't go into the array of pricy headphones I've owned...

CONS: Be aware of their comfort factor. They are so large and heavy, that when I have them on the smallest setting, the casual observer thinks they don't fit (and I have been laughed at when I take them to work). I have a small head and am 5'7" tall. Anyone smaller than this might not be capable of wearing them. They look ridiculous and comical. I do not believe I could wear them for 8 straight hours, but arguably nobody should with any headphones. And they are power hungry. My 800mw tube headphone amp worked, but just wasn't enough as I had the pots at 2/3 to 3/4 for casual listenting. Forget trying to power them from your smartphone... they need a dedicated headphone amp and one with power.

PROS: Sound. I moved up to a Schiit solid state headphone preamp, that puts out a full 5W (you can look that up easily) and my God. Sound nirvana. I simply love them. Great bass, extremely balanced for even my old ears. They are like having a pair of full range 20-20khz speakers on your head. DESPITE the size, the sound quality and performance hits me. Every track is a joy to listen to. I would buy them again.

I only knock a star because of the insane size. Is it possible to make them just a tad smaller? People of my stature can barely wear them.

Running these with the XLR finished cable from Monolith on the Monolith Alex Cavalli Amp. I was reading on a few forums about Arya and Clear being in the same league with each other with some differences.
I have had these and was quite happy but some of the reviews in these forums had me thinking some headphones may trigger our next evolutionary jump. I tried Arya and in less than 5 minutes had them boxed back up to return. These AMT''s were far superior in every way sonically. They need equalization - classic smile shape with a slightly flatter right side end band on a PEQ really makes the high end and the bass come alive and as you lean into the volume the sound stage opens up. I have had ESS Heil AMT's for years and believe AMT's , ribbons and planars own the midrange and upper end. These also have nice bottom end- with 15" subs and butt shakers- bass has taken on a new definition. This is not that. This is legit accuracy at reasonable levels. These will put pressure on the source material. Junk will be exposed. Try flac and lossless or 192k etcc on youtube to test.

Give these headphones enough power and they will sound amazing. They DO require a lot of power, and if your headphone amp is underpowered, you'll hear amp distortion as you try to get enough power to the AMTs. But once sufficiently powered, they are simply incredible.... I've broken them in gradually over the last few months and they've improved considerably... didn't sound bad to begin with, but they have blossomed over time. I used them professionally in my recording studio, and also with mobile electronics (paired with the Monolith Alex Cavalli headphone amp). Love, love, love these headphones! The sound stage is impressive, the depth and response is staggering.

Outstanding clarity and transparency, especially amazing at this price point. Sound quality is even better than most planar magnetic headphones. And they can be easily driven by most desktop headphone amplifiers. Just one flaw: the idiosyncratic nonstandard connection configuration of the 4-pin mini XLR headphone cable connectors going into the earcups. You can't use standard mini XLR alternative aftermarket headphone cables because of this - they would short out the headphone amplifier and possibly damage it.

These are solid headphones. Perfectly usable sound with no major weak points I can hear. As far as I'm concerned, these have one major downside and one major advantage over all other headphones I own. The downside is that they're truly massive. My head is reasonably large (at least as far as racing helmet companies are concerned) and the tops of the earpads rested on the tops of my ears before I attached some extra padding to lift it a half inch or so. The benefit to these, however, is that they've got the most tactile bass I've ever experienced from a pair of headphones. I've got some killer subwoofers in my home theater and these make my ears vibrate in exactly the same way as the subs with no distortion or muddiness. It's uncanny. For reference, I'm using these with a budget balanced headphone amplifier that makes five watts RMS into this 32 ohm load and I don't think they need quite that much power (though they certainly appreciate it). One watt RMS would probably be more than sufficient for anyone who wasn't deliberately trying to blow out their eardrums. By the time it starts clipping, my eardrums are being brutalized and the headphones are physically bouncing off of my head. On the other hand, the headphones have clean output up to that point, so I have no doubt that they can take the rated 10 watts for 200ms if deafness is your goal.

Good headphone, excellent punch, very impressive. My favorite now. My 20 year's passions, and the first AMT with beatiful sound.