ATI/"Simplex" HPSS-4 Siren Test -- 6/5/24 -- Voice & Whoop + Ambience -- UNI, Cedar Falls, IA 

Hello, I have a project coming up and would love to use this video in it and others if you have them of this model sounding, I can leave your watermark on and credit in the comments... I may have bought one of these speakers to play with lol

I might’ve recorded this quite a few times

Exit

Are we sure that these aren’t just speakers tied into a Simplex panel?

Ngl, this is actually very neat.

As much as I don't like ATIs, these are an exception because they do the simplex whoop tone.

Nice catch!