The series-wired AC Edwards 360-series Adaptahorns that are installed in my high school continue to be my favorite. Set them on loud and they’ll rattle the windowpanes! I’ve even heard of them referred to as the “burglar alarm from hell,” so I may try to source a few 120v units and link them to my security system because man will those things make you jump!
If I had to choose, I would go with the Simplex 9219/Siemens U-HNH/Gentex GMS simply because it was the alarm I had heard the longest when I had gone through my school years and the one that I was used to and had developed a liking for that and always hoped I would hear them again sometime in my life because I found them very enjoyable. The sound is something I associate with fire alarms. I always thought of them as the alarm that there was the most of within schools at least.
Was it the most common alarm within the school? Its weird because it was in my elementary school and then 9838s were the second most common alarm but for high school it switched around. However in high school we only had 4 9219s instead of the 7 9838s we had in elementary school (and which are no longer there)
Yeah 9219s were the most common alarm in my Elementary School, aside from the newer renovated areas with TrueAlerts. There is only one 4901-9822 in my high school, apart from all the 9846s. Both of these were on 9105 strobe plates.