I agree with the cats on the opera ... just be careful, and when you see them sitting in the chair that occupies the sweet spot, you will know that they are making their move to assert pack dominace over you, and your system. It will probably be one of the older male's who makes the first move, desiring to establish his "ALHPA" status with in the pack. At this point Pet Counseling is useless.
Cats and audiophiles
Are there any cat owners and audiophiles out there? Do your cats listen with you? I have four hyperactive bengals 2 males 1 year old and two females 18 weeks old. The males will listen to chamber music but not symphonic; all hate opera. None use the Avalons nor the Acoustats as scratching posts... lucky I guess. All four will sleep or listen on the sofa except the alpha male Crash (apropos). He will wander over to the Spectral DMA 180 and lay on it for warmth ( why I don't know because the room is warm enough). They will all leave disgusted if I attempt to put on rock or jazz. They will listen to Mozart all night long or until they are hungry, in which case they will "coo" (bengals coo--rarely meow) and do their love bites to let me know it is time for food.