https://headfonics.com/2018/08/verum-au ... -1-review/
![Image](https://zupimages.net/up/18/34/51zo.jpg)
Specifications:
_ 82 mm membrane made from 8 um mylar film
_ 96 db sensitivity
_ 470 grams
_ 12 ohms
Frequency range - that parameter is often speculated by manufacturers, When you see in official specification somethnig like: 5-30000 hz then you should know it's just another marketing trick.