Judging by the wind-down in the Warrensburg video, the loudest sirens are probably Model 2's. These are running slow, like the ones in Manville, NJ. There's also a 12 port siren in there, but it's hard to tell what it is.
Here's a video I just found from somewhere in OK with numerous STH-10's in Alert, a Thunderbolt also in Alert, and an unknown siren sounding in Attack.
http://www.youtube.com/watch?v=JfcRsla-6Vg&fmt=18
The unknown siren may be an xT22 with either a stuck damper or a blocked intake. I was thinking Model 2 at first, but it winds down too slow for that. It could also be something else.