Isn't it interesting that 3 or 4 years ago Pioneer Pro Audio has included in its catalog the 40 years old Bertha and Levan horns designs from Richard Long & Associates ?
http://pioneerproaudio.com/en/produc...e/wav_sub.html
http://pioneerproaudio.com/en/produc.../wav_horn.html
http://www.lightsoundjournal.com/201...eer-pro-audio/
Even using the famous tweeter pods as designed by RLA