Wed May 23, 2018 2:56 am
It's one on a newer ASC controller. It's the same digital controller they use in their newer sirens except ASC set it to dual tone. When ASC wires their siren heads they tend to send the audio from the one or two amps through one side of the array. In this case the person recording the video happened to be on the side of the speaker wired to the low tone side of the amps. You can hear this with the I-Force 1600/STi-1600 in Hawaii. ACA wired the older Alertronics in such a way that that the drivers behind each horn were wired up to different amps. One driver carried the high tone, and the other carried the low tone. I think that's why they always sounded so raspy and rough.