What kind of sound amplifier (dac amp) do I need?

Hi, I would like to buy new and good headphones (dt 990 pro). However, I would like to buy a dac amp that can operate both my PC and my PS4 or other consoles. In the best case, I can also switch between headphones and speaker boxes without having to constantly exchange cables. Are there possible purchase options for around 200 euro? If so, what could you recommend?

Motu m2

For something like that you can simply use a mixer or mixer. That's what they're there for. Do you know how the dt990 pro sound? Or do you just want to be cool because everyone has them? I recommend the Custom Studio.

I looked at some reviews and many think that the dt 990 should be very good. I have already tried them but otherwise I have not tried any comparable ones. Does a mixer or mixer have the same functions as amp dacs?

A DAC is a digital / analog converter. Are you planning to connect your PC and PS4 digitally to it?