I just was pointed out to an interesting article at 6 moons describing people built 23Hz horn.

http://www.6moons.com/audioreviews/hornographic2/1.html

I did not read it yet careful and look forward to read it with interest, to analyse and to comment about the project.

The only unpleasant thing that I see in the article is the very idiosyncratic writing of name “Stephæn”. The only other person that I knew with the same spelling was the Stephæn who owned Audio Asylum. If it is another Stephæn and the name is a coincidence then it is fine but if it is the AA’s Stephæn then I hope somebody stick this horn in his ass and the dirt die in agonizing pain. In other words I do not know who this Stephæn  is....