#1 reason I have to replace passives on speakers I buy for repair. I have a scratching post which the cat seems to prefer over everything else and never have a cat without one. A removable grille held on with velcro or magnets would allow you to listen in the house when you cant sit in front of them and guard them and for critical listening could be removed while you are sitting there. Personally I enjoy my cats enough that the minor degradation in sound quality a grille brings is no issue.
