No sound using Roon from pc to Hegel amp over network

So i setup all Roon PC app settings and trying to directly stream into Hegel H190 over network (cable not wifi) but there is no sound coming out. Tidal is source library.

I tried also streaming directly into my AVR Denon and over Heos it works. Why its not working over airplay network protocol??

Edit: I figured out if i enable DSP EQ then it doesnt have audio output over airplay, but without EQ it works.
Why i cant use DSP?