I was wondering , should I buy a dedicated amp for my dt770 pro 250 ohms or would the built in headphone amp suffice.
Is there any difference at all ?
I'm assuming you already own the DT770 Pro 250-Ohm headphones and have tried them with the motherboard?
And your wondering if getting an external headphone amplifier would improve audio quality?
I would say to stick with what you have for now.
Something like a Schiit Modi (optical) DAC with a Schiit Magni head amp might make a noticeable difference, but your looking at $200+tax/shipping.
or maybe a used ($130) Asus Xonar Essence STX sound card..
Might be best to hold off on buying DAC/Amps and have the next purchase be better headphones.