I headed up to Clare, MI for the Clare County monthly siren test today to record the WPS-4004 at Brookwood Park. Modes tested are alert (560hz) and air horn. Clare & Isabella Counties both run a system of Whelen Vortexs & 4000s (Isabella also has 3 Hornets) that test at the same time with the same activation policies. Clare Co fired up this 4004 right exactly at 3:00pm sharp on the dot, which worked out well because after I packed up and was heading back to Mt. Pleasant, Isabella County finally set theirs off 13-14 minutes late, so I had my girlfriend get a quick recording of another 4000 in Clare (but part of Isabella Co's system...weird) sounding alert (465hz) as we drove by. Enjoy!
Also, I started a new YouTube channel separate from my personal channel, its name is CentralMISirens for obvious reasons.
Clare County WPS-4004:
https://www.youtube.com/watch?v=a0gGUS6Qn7s
Isabella County WPS-4000 Drive Recording:
https://www.youtube.com/watch?v=4DJBJx3FxWs
The main recording is of siren #8 in my (primitive) Clare Co map: https://www.google.com/maps/d/edit?mid= ... sp=sharing
Isabella Co map is in my signature.