RDL ST-VP2 Automatic Ducking ModuleThe ST VP2 can be wired into any line level input of a paging amplifier. A line level music source may be provided from a receiver, satellite decoder, tape or CD source. A line level voice source may be provided from a telephone paging system at line level, or from a microphone which has been preamplified up to line level (See RDL STM 1, STM 2, STM 2X, STM 3, STM LDA3 Microphone Preamplifiers). When a page is initiated, the module automatically senses