Sorry to bring back a dead topic, but I was in Circleville last night and saw that the High St. SiraTone has been replaced with a Whelen Vortex.
In the tornado warning video I posted above, I could hear a newer Whelen doing alert, so I was suspicious that they had either added or replaced a siren. I was in Circleville yesterday for their annual Pumpkin Show, and saw that the 612 was gone, replaced with a brand new Vortex.
Just for reference, the High St. siren is the one featured in these videos...
http://www.youtube.com/watch?v=TvAkfupDj74
http://www.jmarcoz.com/sirens/circleville_ohEOWS612.WMV
...and in these pictures...
http://www.jmarcoz.com/sirens/circleville1_oh.jpg
http://www.jmarcoz.com/sirens/circleville2_oh.jpg
Circleville has 2 remaining 612s, and the other 5 sirens they have are all Whelens.