I posted on the Logitech forums and they told me its probably messed up voice coil? It started yesterday after playing some music at a little over 50% volume and all of a sudden it started to make a noise like something was loose. And now the air that comes out the front of the sub seems weaker, and even putting my hand on the front it doesn't pull in air as much as it use to. So, anyone ever had to do this? I need help looking for a replacement woofer to put in it, maybe something better that won't break when I put full volume? I don't want to spend too much money on this.