2nd & 3rd were in my opinion sound unconvincing - much boomy bass, little mature heights and centers.
The Sony MDR1RBT is sonically really a work of art, the many good reviews he has deserved and I could not imagine that this is yet to beat me. The only drawback: the maximum volume while Sony is not very high (tested with iPhone 6 and iPad Air).
Then the Airy came in the mail and unpacking took me out the size surprise: unlike the others, he is visually rather plain and filigree - no rießiger Brummer on the head but just so great that it then raised really surprisingly good and sporty looks!
The Bluetooth connection made with the above devices is no problem - is from the connection to the device and switched on again, the Airy connects when you turn right again automatically.
Next, the most important, the sound test: Again absolutely convincing and finely elaborated -Powerful bass, detailed mid & treble - exactly as it should be. In the sound representation for me therefore on par with the Sony MDR1RBT. A distinct advantage, the Airy however: it can be adjusted much louder, then what was the last decisive purchase criterion for me.
The skeptical assessments concerning the wheel to adjust the volume I can not confirm the way. It rustles nothing and my Apple devices respond perfectly to turning the volume wheel.
All in all a brisk headphones with really great sound experience.
Typical devil again, well done :-)