FT1

Fiio FT1 (standard, not pro) + the Meze boom mic is in your price range. If the Meze is too pricy, you could look into knockoffs. Meze is the major name, but I did notice knockoffs existing between $20-30 USD when I was shopping for my own FT1

hd560s sama r50x bagus mana? 2-2nya bagus kok bang tinggal nyari suara kayak gimana aja. HD560s lebih condong ke neutral-ish (ada yang bilang aga nyelekit treblenya tapi gw kok gak ngerasa gitu ya wakwak). Yang R50X lebih ke arah V-shaped jadi bassnya sama treblenya lebih adaan di R50X (sama mungkin

You could go for planar headphones. Fiio ft1 pro or Hifiman edition xs. Both are inexpensive and easy to drive even from apple dongle. They sound great and have very open soundstage.

Unless you need that rugged of a build, you should return the DT 770 ProX and get a pair of FiiO FT1 headphones. The FT1 headphones are very efficient, have great audiophile quality sound, and should represent the improve sound overall solution that you really need. Or step up to the vastly improved