Merlin VSM (used), may be a good choice in your price range.
You may also want to buy your Cat; a scratching post, cat bed, or other Cat toys and put some Catnip around those items to draw her attention away from the speakers, and towards something more pleasant. Although, Cats don't play by the rules!
You could spray her with a water bottle, or blow a horn if you catch her messing with your speakers. You could also tie ballons around the base of the speakers with string and if she pops one then, she probably won't mess with them again, but just make sure that she doesn't swallow the popped ballon.
You could also have her de-clawed, and I'm not taking about the Cat. "Only Kidding"
Good Luck,
Rich
You may also want to buy your Cat; a scratching post, cat bed, or other Cat toys and put some Catnip around those items to draw her attention away from the speakers, and towards something more pleasant. Although, Cats don't play by the rules!
You could spray her with a water bottle, or blow a horn if you catch her messing with your speakers. You could also tie ballons around the base of the speakers with string and if she pops one then, she probably won't mess with them again, but just make sure that she doesn't swallow the popped ballon.
You could also have her de-clawed, and I'm not taking about the Cat. "Only Kidding"
Good Luck,
Rich