Hi everyone. Finally, my speaker project is completed. Took a long time. I changed the tweeter design to use two "bullet" tweeters each 20 degrees off center axis. This was done to expand the "sweet spot" as bullet tweeters are (as their name implies) extremely directional like bullets I also changed the mid range horn drivers to Emilar EC-175. I tried several other drivers that are designed to work down to 500 hz but I like these best. The six channel amplifier has 24 db crossover built in before the amplifier stages with crossover points at 500 and 5500 hz. Only 80 watts per each of six channels but it is an enormous amount of power when all is delivered straight to highly efficient horns and none lost in power robbing passive crossovers.