I know what you mean about the thump when you normally turn it off, but this one is much louder than regularly. you can also feel air coming out of the sub. In addition, no sound comes out of the speakers. the night when it happened there was huge continual pops and fizzles and feedback even when there was nothing playin on the speakers, just happened when speakers were on. this doesnt happen now, but i cant play sound from the speakers anymore.