Hola Mar-cal...lay on it´s back the request, be careful to put a pillow or a cushion at the binding posts. Then, with the aid of a rubber mallet, hit at the bottom of the speaker, the rail until you unlock it. It will move about 1 inch then it will come loose...try at the tweaks section of this forum and search for panel shower. It will guide you the whole process and how to do it. Happy listening,
Roberto.