How do I replace the leather headband?

Hi Dulfo!

I checked some of the similar models (that had pictures), and most models seem to have screws holding down the clamping mechanism for the headband. See the following image:

_{(Original Image courtesy of Broske in their Audio-Technica ATH-M50x Teardown, my modifications)}

I cannot say exactly how the headband is taken on or off, but hope this lead helps! Otherwise I'll hope that that teardown may be useful.

Cheers!