I have had both cats and speakers for decades and haven't had any issues.
First of all, I have a separate audio/tv room in my basement. Unfortunately, it doesn't have a door. So, I simply put a shower curtain on an expanding rod across the entry way and a cheap baby gate in place and they forgot there is anything behind it. So, they don't go into the room until...
Second, when I am listening to the stereo or watching a show, the cats are with me. As I keep the original plastic bags the Magnepan LRS shipped in over the speakers when not in use (keeps dust off) and a plastic sheet over my equipment shelf (same reason), they don't bother anything because they don't like plastic and finally...
Cats tend to claw things especially when they are bored. We have lots of toys and little trouble.
So, if you don't have a separate room that can be enclosed, try a plastic dust cover for the speakers and the equipment. It's not the most aesthetic solution, but it's simple, it's cheap, it's easy to remove and it seems to work.
Keith

