As some of you know, I have other passions in life than just mere hotrod building. Some of you have been witness to my relative audio reproduction expeditions and in general know that I have a pretty hard core taste for things that are 'tech' savy.
Seeming that I have been into audio as long as I have been throwing wrenches, I ran across an article that a fellow audio junkie passed on, and have found the holy grail of low frequency reproduction. Be warned, this link in not for the weak, but its purpose is for the refined hardcore. I will implore that you read the whole article and not just stare at the pictures. This effort is loaded with hardcore tech, science and known physics.
The worlds largest, horn loaded, sub frequency transducers