Tapped Horn 21" TH1821 - What do you think of this design?

Hey there!

Im thinking about building this enclosure.

What do you think of this design in general when you look at it just roughly?

It seems like it is a transmission-line / tapped Horn combination. Can this work well? I dont find any reviews or pictures online..

I would use it with the 21LW1400 from 18Sound and it should cover 30-70Hz with playing heavy bass-music..

With all the best,
C.
 

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I would use it with the 21LW1400 from 18Sound and it should cover 30-70Hz with playing heavy bass-music..
The design you linked is optimized for response above 40Hz, it won't provide much useful output below that.
Driven with heavy bass below 40Hz would be a waste of power and could damage the speaker.

Josh Ricci's well-documented Othorn is designed for response down to 30Hz:
https://www.diyaudio.com/community/threads/the-othorn-tapped-horn.193418/

https://data-bass.com/#/systems/5b11db52a201f10004e39d7b?_k=dfm0rb
 
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