I know to get talkback working on the norstar you have to use a line port for the speaker, and will have to wire a 24v power supply in series with the speakers audio path.
Does anyone know which power supply to use and how it gets wired into the line port and the speak audio path? They are using a Bogen TBA-15 amplifier with talkback speakers. Do they need any other equipment besides this and the 24V power supply? Thank You
