I was not familiar with the sound of Beyerdynamic until recently after acquiring their Lagoon Premium ANC headphones, and most recently the Amiron Wireless Copper. About my background - I am a musical aficionado, aka "an audiophile". I am a professional musician, concert and recording artist and sound and music is my life. My latest interest was in a truly great wireless set of cans for listening at home in the late evenings when I can't use my big audio system. I've went through BW PX (which I own), PX7, Shure Aeonic 50, Lagoons, Sony MX3, Dali IO6, probably a few others. Before I get to the Amirons, Ilet me just say that my priority for my type of listening with wireless headphones is SOUND QUALITY, ANC comes second and is not important for me. Also, I am fully aware that a Bluetooth headphone can't and shouldn't be compared with a wired one. With that out of the way, as far as Bluetooth cans go, the Amirons are the closest that come to "musical perfection". They posses incredible detail from the lowest to the highest sound spectrum, in a perfectly blended and balanced for a "liquid musical nirvana". I want to address an important issue with regards to the bass. Many people and reviewers have weak/insufficient bass die to poor fit. This is trus and easily correctable - the fit must be perfect around the ear with a proper seal in order to hear the bass of the Amirons - and they do have it in spares. If you press the cups towards you ears, you should immediately hear and feel all the bass. Now, if this happens, what you can do to oncrease the clamping force and make a good seal, is gently bend the metal extensions just before the Y split - see my photo where I am pointing to the exact spot. These are meant to be adjusted. I have done that, and boy, did it resolve any bass issue. I have a perfect seal, and while the comfort is just as good, the bass is all there and the sound balance is absolutely stunning!A few words about the sound - lows are deep, and I mean deep. If you have a bass rich song, you will hear it and feel the impact on it. Please, don't mistake the well balanced sound signature for a "bass heavy" cans, these are not! The lows are extremely clear, clean, tight, weight and defined. It is not bloated, nor does it bleed into the lower mids. It's there and it reveals what's in the music, if the music has it.Low mids are full, textured, and perfectly blended in the mix. Higher mids are extremely nautral in timbre - male and female voiced sound "centered". Instruments in the mid register sound very realistic with plenty of micro texture. Strings, piano, harpsichord, human voices...Higher register is extremely extended, clean, transparent and never shrieking or over detailed to the point of being distracted.Overall, the whole tuning of Amiron is an expansive soundstage (quite impressive for a closed back design!) with the sound surrounding you. You are in the center of the stage, and there is plenty of air and separation of instruments. Never a sense of congestion. Beyerdymanic has really achieved something special here and these may well be the most musical and "best" wireless headphones available. Of course, they are on the neutral-natural spektrum of tuning. There are other headphones with much different tunings, that may appeal to different tastes. However, I can say the Amirons are absolutely a Hi-Fi audiophile grade headphones. There is just a liquid musical magic oozing out the them with virtually every genre of music that I threw at them. Fit and finish is superb. So is comfort, even with the increased clamping adjustment which was critical for adjusting the bass, they remain extremely comfortable in my head after 2-3 hours of listening. Hope this helps.