HiFiMan HE4XX
Inconvenienced
Owned for 3 years, used Daily
Stress Points- Earpads stitching gave out within one year. The earpad mounting ring system is extremely fiddly to work with, being difficult to replace as the clips need to be popped in without seeing the holes.
Replacement rings can be bought from HiFiMan, or 3D printed (although the clips may be prone to snapping). The best solution is to 3D print the "Ear Pad Mounting Adapter," which screws into the earcups and provides a solid surface to simply slide replacement earpads on.