if you really want a loud, obnoxious alarm... then here is your ticket... this thing weighs at least 5 lbs. very heavy which indicates very loud / long range, made by dynamax... model MS100... 100 watt
it has a big mounting bracket visible in the pix
could be used for other applications as well....
on the web....
The DynaMax speaker is one of the most compact speakers on the market today. Its unique patented design enables it to be installed in many locations on emergency vehicles. Just 2-5/8" deep, the DynaMax 100-watt speaker can be mounted easily behind the grille, flush between the bumper and hose tray of a large apparatus, or on the vehicle’s bumper. Mounting bracket is not included. Dimensions: 5.8”H X 5.8”W X 2.6”D.
i can hook it up to a battery charger and demo it.... bring ear protection