Notifier ABA-2 Audio Buffer Amplifier (REFURBISHED)
Notifier ABA-2 Audio Buffer Amplifier increases the total number of AA-30/AA-120 audio amplifiers that can be used in a System 5000 or AM2020/AFP1010 fire detection system beyond fifty, and it supplies one of two user selectable backup tones that are automatically activated in the event of the loss of the primary audio signal from the AMG-1 or ATG-2.