Hi, my source is laptop with integrated audio card (Realtek HD) I want to buy Beyerdynamic DT990PRO 250ohm because they have great reviews and they are in a sweet price spot for me. I'm worried if my home theather amp can power them? Currently I'm using Pioneer VSX-519V receiver, connected with HDMI to my laptop. Should I continue to use this amp or should I buy dedicated headphones USB DAC amp like Audiotrak Prodigy Cube?
Second question is, If I'm passing audio through HDMI, would buying extra external usb audio card make a difference in sound quality? Thanks.