My high school's intercom has: Penton LCS Series speakers Atlas Sound square speakers Quam speakers in gym locker room I have recently found some Sonance-style ceiling speakers in the weight room
I think my high school uses Valcoms 1020C Speakers and 1030C horns I also saw a another White version Valcom Horn in the weight room at my school All of those are for announcements I also saw a Atlas FD72W Soundoiler in the Cafeteria But they are disconnected and don’t work and in the gym they had Atlas AP15T Horns but it’s old school And lastly they had some Aluminum Lowell RS8-A Speakers
