Lee, it uses a giant transmission line woofer with a beam splitter behind the panel, he has since added an equally amazing push pull sub, I'll grab more info on that later. He designed and built everything, including the jigs himself!!
http://jazzman-esl-page.blogspot.com/
I'd like to plan a trip to Georgia to hear these beasties
http://jazzman-esl-page.blogspot.com/
I'd like to plan a trip to Georgia to hear these beasties