Comprehensive system that combines page stacking, feedback elimination, pre-recorded messaging, and background music control in a single device. The BOMDMU makes feedback through the paging system virtually impossible by opening the loop between the input microphone and speakers.For busy overhead paging systems, the BOMDMU offers 3 channels of page stacking and feedback elimination. For emergencies, the BOMDMU offers a priority input that overrides the stacking and messaging functions and provides immediate, real-time access to the paging system.For security and general public address messaging, a pre-recorded messaging sub-system has been included. To keep everything in harmony, the BOMDMU also includes a background music input.