hi carl

I modeled up a 40hz horn for the lab12,for corner usage in a home.
No doubt,im sure it would be impressive. I have a 40hz horn already,and i like it alot,infact most the time (depending on program material) i cant tell if im using the 40hz horn or 33hz tuned jbl (ported) as i switched between them alot comparing.

Certain tunes will use that low end extension. I certainly would think a 40hz F3 is a valid target for most music especially in pro usage

Sizes were about 300-400Litres depending on if its a corner use horn or stack of 2 or 3 in 2pi space.

Although never built(due to $ cost)Everyone on the forums trusts mcbeans program to model an accurate response.

Cheers!
Mike.e

also
http://homepages.paradise.net.nz/quadroph/ts/ts.html

Btw my 40hz horn does 126db in the car with 20watts :-)