FWIW there was some nice MILsurp LRAD kit on eBay a few years back. Looked like there was some corrosion but repairable, possibly functional in its current stat

FWIW there was some nice MILsurp LRAD kit on eBay a few years back. Looked like there was some corrosion but repairable, possibly functional in its current state. Wasn’t the truck sized one, but big enough (about 1m emitter) to do what is seen in the video. Sold for around 3000 iirc lol. I don’t think anyone knew what it was or it would have sold for a lot more. The seller had no idea, or at least wasn’t letting on if he did. So, it’s not like LRAD is controlled like SAMs or something. Also, pretty trivial to build. Idk what the IP looks like on it , but back of the napkin you can build a 1kw unit for around $7000 buying the parts at retail. The expensive bits are the transducers. Everything else is a few mosfets and MCU/software.