High impedance headphones problem

[MTBRiderLV]

Hello! I have ROG Phone 5s and recently purchased ROG Phone 8 pro. I have decent headphones Beyerdynamic DT770 Pro 250ohm and for 5s it wasn't a problem to drive them, but for 8 pro looks like it doesn't have enough power to drive them-they aren't as loud as on 5s and make weird sounds on max volume. I can't find any information about how high impedance it can drive.

[AndrewMcN]

I don’t have any immediate answer for you but that is quite strange because those headphones apparently only need 100mW which is nothing for a smartphone. It’s about the same as my IEM’s. That impedance is really high though. There is probably something in that, that’s causing your issue. I’d think you’d need to pursue tech support down that avenue to see if they can provide a specification on the impedance handling. It seems like it’s a powerful DAC they’ve got in there but clearly you’re encountering some kind of electrical limitation.