help needed with exponential horn

[contessa]

I am trying to build a folded exponential horn with a collapsible throat, for a mechanical phonograph project, which will also be used with a tiny fullrange unit.

Would a throat lengthened/shortened about 4.5cm have any audible difference in a 130cm horn's sound quality? 😕

The horn will have a throat of 16mm, a mouth of 75cm in diameter, thus reaching down to 228.8hz...

 

[duncan2]

Scroll down -


https://www.grc.com/acoustics/an-introduction-to-horn-theory.pdf

 

[contessa]

thanks duncan..