You can modify, install a seal inside, between the two halves of the body, so that a sealed volume forms behind the membrane. Before that there were xd200 (comfortable and the sound is not bad). Then I bought an xb700 (I gave it back because of the excess of bass. But they have very good materials). Then I took the HD 280 Pro (I think the issue with the headphones is closed). But after a few years you have to change the ear pads.
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