Thanks @Resolve for your answer.
I’m using GRAS 43AG from HBK.
For “technical” driver i mean properly distributed magnetic field, very thin, controlled and long range excursion, directivity and so on.
I was mainly considering the HEDDphone 2 GT atm.
Want to try the ribbon but was slightly scared from the driver modes of H1 and maybe strange directivity.
I was also intrigued by the Para 2 for their traces and controlled magnetic field.
At the end i think i will buy again LCD-X 2021 new for warranties and so on.
Thanks again!