My horns are the AH 300. Price is around $2800/pr.
The link works for me. Go to the Acoustic Horn Company homepage. Then click on "How They Work". Then select "Conical Horn Geometry". That process will take you to the page I linked.
In this article, Bill explains his reasons (and how he reached them) for using the conical horn rather than something flared.
How do you determine what is a "true horn"? It would seem that you have set an arbitrary picture in your mind of what a horn is to the exclusion of any variant.
The link works for me. Go to the Acoustic Horn Company homepage. Then click on "How They Work". Then select "Conical Horn Geometry". That process will take you to the page I linked.
In this article, Bill explains his reasons (and how he reached them) for using the conical horn rather than something flared.
How do you determine what is a "true horn"? It would seem that you have set an arbitrary picture in your mind of what a horn is to the exclusion of any variant.