Beyerdynamic dt 770 pro 32, 80, 250 ohm all versions need 100 mW power. In this case, how is it easier to drive 32 ohm headphones than 80 or 250?
if the audio interface audio output has a constant voltage ; 32 ohm dt 770 pro, uses much more amperage ( 'i' ) than 80ohm or 250 ohm dt 770 pros...