On the Siren Archive, I came across this picture, and a sound clip:
Picture
http://www.jmarcoz.com/sirens/hoffmanestates_il.jpg
Sound clip http://www.jmarcoz.com/sirens/jumboalle ... tes_il.mp3
So what exactly is a "Jumbo" Allertor? What is its horsepower rating, and decibel output?