Explanation of horn size

[Maxox]

Hi,

I would like to understand why the horn mouths (mid and high) of this speaker from Krix are those sizes ?

This is a big speaker made for commercial cinema.

KX-5910 | Krix
https://www.krix.com.au/wp-content/uploads/2018/06/KX-5910-Cinema-Specification-Sheet-005.pdf

The horns are :
High F XOver @ 1600Hz horn is a square 340x340mm

Mid F XOver @ 350Hz horn is a square 501x501mm

I can't figure out how they were design.

Thanks for that. 🙂

 

[AllenB]

The higher frequency horn is sized to provide a coverage angle for its frequency range. The mid horn lets its coverage get wider, while focussing on being loud, and this makes it not as big for 350Hz.