All of the sirens in Wood River, Hartford, Roxana and South Roxana were all replaced a few months ago with ATI HPSS32 sirens. All of the cities mentioned here had Whelen Vortex and 4004 sirens previously. I have a couple clips of a test and a storm where they were set off. I don't know how long these sirens will last but they do have a good "bite" to them even in my house with windows closed and fan running.
I do miss hearing wind up and wind downs of the old sirens. Below is the link to an article explaining the new system that was funded by the local oil refinery.
http://www.prweb.com/releases/2014/12/prweb12407210.htm
Clips with the new ATI system
http://www.youtube.com/watch?v=DFlSGxqPwTI
http://www.youtube.com/watch?v=uyNDl0oa2ok
This is a clip before the sirens were replaced with the Whelen Vortex being heard from the same location.
http://www.youtube.com/watch?v=mqeV-9cYo_A