u/Able_Limit_7634

EDIT:

In the title I said "headphones", but I was referring to IEMs.

​I just received my Fiio M21 and it feels very premium. I am currently using it with my Beyerdynamics, but I also bought some IEMs on AliExpress, specifically the KZ ZS10 Pro X. I would like to know if anyone here has tried them, if they are a good buy, or if I should look for better alternatives.