So apparently, my old middle school got a HUGE fire alarm upgrade, completely ridding all of the old SHGs, GX-90s, 450D-VALS, the unknown alarm (which I now know as an Amseco BZ-54VT with a RSD-24L strobe, Name That Fire Alarm would go nuts over that) and some older Commanders. Now, where those alarms were is now an outlet ledge in classrooms and a cover-up backbox everywhere else. The school now has Gentex Commander 4 horn-strobes everywhere, with normal Commander 3s in certain areas like the Big Gym. I only know of this by pictures, so I’m not entirely sure if they put horn/strobes in the classrooms or not (couldn’t really see a grille). Funny thing: the first image I saw of one farther away, I almost assumed they were L-series alarms, and I felt evil for my little sister who is going to that school :lol: :lol: . But as I saw them as Commander 4s, the evil slipped because those things aren’t really loud compared to System Sensor’s buzzers. So yeah, more info on them as time progresses.