Macrojack is right!.....I love cats, but I can't have one because I love HiFi just as much. A cats instinct in a house is to catch a mouse. I'm sure their acute hearing goes to the woofer and tweeter direction which is right behind the grill cloth just luring them like a small hole in the baseboard. Grills off? The cone movement would be icing on the cake to a cat, way better than a fake mouse. And who doesn't like the feel of basking in the sun. Cats are small enough to bask ontop of an amp. As an extra,a vacuum tube amp cover might give a little vibration too like a coin operated hotel bed on TV sitcoms. If there is some kind of spray that will prevent those cats habits I will buy it and a cat.....sincerely Mark Korda...P.S. I forgot about a turntable arm in motion?