<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html;charset=windows-1250"> <title></title> </head> <body text="#000000" bgcolor="#ccccff"> Here are some very handsome and effective caster cups made exactly for that purpose. They are two part brass cups, acoustically insulated from each other by a ring of special vibration absorbent material. <img src="cid:part1.07080709.06050002@pianofortesupply.com" alt=""> Jurgen Goering Piano Forte Supply <a class="moz-txt-link-abbreviated" href="http://www.pianofortesupply.com">www.pianofortesupply.com</a> <blockquote type="cite" cite="mid200502050100.j1510xB13946@bridget.rudoff.com"> I was wondering if there's anyone with experience soundproofing a room so as to minimize the output of a piano to adjacent rooms/floors, without doing anything to the piano itself. Thanks. - John </blockquote> </body> </html>