Cat-proofing your speakers...

If anyone comes over my house you would never smell a cat a dog or a bird, all coexist in my home.

Guys,
Stop this nonsense already. A member has asked about catproofing his speakers, and you give him all these silly ideas.
In all seriousness, here is the ONLY thing, that works.
You will have to spray the grills of your speakers with the OTHER cat's urine- that will stop YOUR cat from approaching the speakers.
The first spray usually is good for about 6 months, and then you'll have to re-spray every 3-4 months, or so.
You will get used to the smell fairly soon, but your cat won't, and so won't your visitors.
Some urines work better, than the others. One of the Mongolian Hi Fi mags published a review, comparing different species, but I cannot recall now, which one came out on top.

yeah, four cats here, no smell.

and as to what sprink mentioned - the feliway - i will say that we have a couple of the "diffusers" (feliway comes in several different forms) and they are incredible in their ability to chill the cats out. they do minimize - probably eliminate, but i won't make that claim to be safe - scratching. in fact, every time i notice the beginning of naughty cat behavior i check the feliway bottle and sure enough, it's out of liquid.

they're expensive, though, that's the problem. so i would definitely try the spray around a pair of speakers, the diffusers are magic.

So much for buying used speakers now. At least I ate breakfast before reading the last post.

My post was in reference to Maril555's post.