What do you do if you have a speaker cabinet that does not have a built-in speaker mount socket, but youd like to use it on top of a tripod speaker stand? Simply install a bmb-200k to the bottom of the speaker cabinet, and youre set! The bmb-200k is an external mounting bracket for speaker cabinets that do not have built-in speaker mount sockets. It mounts on any flat surface with included installation hardware.