No, that means the sound is actually being produced. If the logitech subs could do that their speakers would cost a LOT more than they do. What I am talking about is when it gets to a point where it seems they won't go any lower, and if you try to push it, you will just hear a badly distorted sound with the diaphragm violently rattling against the sides of the enclosure. If you listen to that at a low volume, it simply won't be produced (it is rolled off), and when you turn it up, it starts to make a distorted sound and rattle (still rolled off, and now distorting).