Cat-proofing your speakers...

check the archives and expect tons of humor (a stick with a nail) in between some valid ideas...

good luck

I would suggest "inna gadda da vida" on repeat would provide protection.

What is yellow-brown and looks good on a lawyer?

A Doberman.

Sorry, I couldn't resist.

The only way to cat-proof (as well as child-proof) your house is not to let them in. Cats cannot be stopped. They have to investigate everything for the reason of their safe being. The only way is to place items so high that cat cannot reach (jump) - not likely. I have tried to spray nasty smelling stuff designed to keep cats from the furniture but it did not stop my cat from scratching. Young cats are the worst.

I really loves cats so much!..... well, compared to Lawyers, that is

I have two books "100 Uses for a Dead Cat" and the sequel "100 More Uses for a Dead Cat" Once you do the deed I would be happy to make some suggestions. The most creative is have a taxidermist install a pencil sharpener just beneath the tail:)
But in reality and seriousness, I don't think a cat can learn to not do what it has grown used to doing. De-Claw it or make it an outdoor cat. A leash? A cage? A good dose of qualudes in its milk each day? Electric pads around the speakers that won't ruin the bass response? Just some ideas that probably won't help. One last one leave the door open and wait for it to run off with that Siamese down the street.