@Amir : thanks for your reactivity, it's impressive !
So, at 59mW, I could reach about 115db with the HD800 (sensitivity 102.3 db/Vrms) and the NX4 ? And with 123mW (DX3 Pro) almost 120Db ?
I do not want to listen at insane levels, but do the power reserve matters in listening enjoyment (for...