I saw these in a Japanese audio magazine. They support and isolate your speakers. They certainly look cool as well. My speakers are on carpet and one speaker slightly wobbles due to the uneveness of the carpet. I've stuffed part of a magazine underneath for better stability. Are these type of plinths common? I haven't seen these in any U.S. advertising. Here's a pic. http://www.kryna.jp/IMG/orquesta_sboard_p05L.jpg