Basically, when I replaced the subwoofer's fuses several times, they kept blowing out the second I turn the subwoofer on. I was thinking it might be because of the power that goes through my house, but that doesn't explain it fully, because I turned them on downstairs, where the power should be fine (But I did all this many months ago, so I don't know if i remember correctly). Could it be because these speakers were like 3 years old? Also, I remember that when I had these speakers plugged into a computer in my brother's room, sometimes the light on the dock would turn on, but no sound would come on. Then, later, the sound would work, and then it wouldn't again. Is there a reason that will explain this?