Here is the main star of this past Tuesday. I stood between 2 1000Ts, both about 800 ft away from the camera. The audio recorded is just astounding. The 1st test done by Marshall County is for 3 minutes and 4 Thunderbolt 1000Ts can be heard. Then the 2nd test done by the Toluca Fire Department is for 1 minute, and the Cyclone in downtown joins in. I can honestly say, this is the best siren test I have, and maybe ever will record.
https://www.youtube.com/watch?v=RWiqD_I-0Js