My mother has some HD-590's, my dad told me that when she listens to them at high volumes you can hear them downstairs. I was blown away when I was visiting them for the holidays, when I found out he wasn't exaggerating. You could hear her music(only the highs) downstairs, from an upstairs bedroom with the door open. It may have been their home's acoustics, but she must be killing her ears I tell you what.