minus-squareTheColeys@alien.topBtoHeadphones@hi-fi.community•From PC38X to DT1990pro/HD660s/Edition XS/linkfedilinkEnglisharrow-up1·1 year agoI have the 660S and the 1990, the 660S is way sharper in treble. linkfedilink
I have the 660S and the 1990, the 660S is way sharper in treble.