hi i finished to build a pair of backloaded horns, using a 8" coaxial driver.Still missing is the front wave guide, and the spikes. Pictures of how i made them, here at this thread of my forum: [URL]http://www.audiovoice-acoustics.com/forum/showthread.php?t=225[/URL] and here the final result, and description, how they sound : [URL]http://www.audiovoice-acoustics.com/forum/showthread.php?t=300[/URL] Angelo [IMG]http://i307.photobucket.com/albums/nn281/AudioVoice/Imagem356.jpg[/IMG] [IMG]http://i307.photobucket.com/albums/nn281/AudioVoice/Imagem347.jpg[/IMG]