YS13A Backbox for PC391The YS 13A box allows exposed wall mounting of a power controller or speaker controller when such a device cannot be mounted in the wall. The box can also be installed on a desk using the supplied feet. Product Features Wall mounting box Allows exposed wall mounting of a power controller or speaker controller when such a device cannot be mounted to a wall Designed to surface mount N 8050DS, N 8640DS and N 8650DS on a wall Can be installed on a desk