Audible System Test - 3 models of horns

Requested by Alarm776, here is an audible test of three different models of horns: Simplex 4903-9218, Simplex 4903 - 9418, and Wheelock 7002t. As you will see, I forgot that the NAC running the non synced strobes (also running the mechanical horns in the video) is set to "sound till system reset," thus the two mechanical horns sound 10-15 seconds after i silence the TrueAlert.