Today I've had a problem with dx50 for the first time. I had some problems with an album with tracks that were repeated without respecting the correct order. After selecting another album the player set the volume to maximum level with low gain setting. I've immediately lower the volume that is gone to normal with a single click (to 256 to 200 with one).
The next time I'll be more careful.
I did the same mistake too lol. Good thing is I'm not using a sensitive IEM. What I'm doing now is I turn on the DX50 first and check the volume then plug the IEM. I also set the volume to 190-200(low gain) before turning it off.