I got a Canton AS-85 SC powered sub.
I was gaming on my HTPC the other night. All of a sudden a really loud rumble starts. First thought was earthquake, then I hit the power switch on my loudspeaker really quick because the sound was REALLY loud. No change. I realize it's my subwoofer acting up, so I run over and rip out the signal cable, no change still! I finally hit the power switch on the thing and it goes silent.
As soon as I turn it back on, it starts rumbling and goes really loud really fast again. What happened? Did it break just like that? I wasn't even stressing it. And what's the sound? Is it electricity I listen to or what?!
This sucks, it's only 1,5 years old.