This is just not true, at least for my pair. The hiss is very noticeable and is independent of volume level. And mine absolutely should be a fixed pair since I just got them at the end of last week. There is a very very clear difference between the headphones being on and off. That said, its not really noticeable when audio is playing. Though it is noticeable during quieter parts and when nothing is playing. If all pairs sound like mine, I find it hard to believe that others wouldnt be able to hear it.