What does this horn belong to?

[JB Brown]

Hi All,

I picked up this 9 panel horn last summer but have not been able to figure out what it goes to. The threads are throwing me off as I don't recall seeing many phono horns with threads like this. Thoughts??

[Stephen_Madara]

stadium speaker not phonograph related

[JohnM]

Early Public Address horn.

[Henry]

Still, it's an interesting and attractive object, IMO. Wonder what would happen if it were hooked up directly with, say, a Victor/Victrola taper tube? At worst, you could use it as a planter, upside down, complete with drain hole!