From the ETA Website:
"The legacy Mini Open headphone was an exercise in maximum minimalism - stripping down the enclosure to its most basic form to reveal the most potential of the drivers within. The question therefore arises - given the unique strength
HIGH RESOLUTION AUDIOPHILE GRADE DRIVERS: MAS's new 40mm dynamic drivers equipped with proprietary diaphragms and super lightweight aluminum-copper voice coils produce detailed mids, precise highs and rich solid bass.
Listening on the move is being redefined with SoundMAGIC's even more portable and convenient wireless P22BT headphones. With the P22BT version, SoundMAGIC have added Bluetooth wireless connectivity with high-resolution sound while retaining the same
The ATH-M60x on-ear professional monitor headphones utilize the same proprietary 45 mm drivers found in the ATH-M50x headphones, delivering exceptional clarity throughout an extended frequency range with accurate bass response.