Nope, never did. I always have the cover on too unless somebody wants to see the crazy cone movement. 2 cats and a dog and mischievous nephews, anything is possible.

As a tuning tool, it's really good to make you realize that you should be happy you didn't buy a cheap sub that might vibrate and rattle like it did with the toy in there. Pre-cat toy life, it was actually one of those stuffed animals with a block of wood in it to make it sit on a shelf so it really sounded nasty.

With great power comes Awesome irresponsibility.