Giant Spiral shaped fiberglass horn for 8 1" Tang Bands

I just finished drawing up the plans for what would be my flagship, had I the funds to build it. I will be built though. This design uses 8 of the 1" Tang Band W1-1070SE drivers in a wooden Unity horn like configuration plus a giant fiberglass spiral rear horn. Frequency response is ruler flat down to 45 hz or so and hits 125db down to that frequency (corner loaded). The impulse is fantastic and group delay is comparatively moderate (averaging between 8ms and 15ms with a peak of 35ms at about 50hz. This design is so efficeint it could reach it's full potential with a very low powered amp(2-3 watts). I'm dreaming of the Trancendant Sound OPT SET.

Here is a link to the Sketchup Model: http://sketchup.google.com/3dwarehouse/details?mid=a9c506f7521e56cde1fe2e95a7b336e7&prevstart=0
 

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The front chamber is 60cc and the rear is 5.04cc. There is a compression chamber for both the front and rear horns, the front horn actually has a seperate chamber for each driver, it's rather complex to discribe the best way to see it is to download the Sketchup file and disect it, although the size of the compression chambers is the one thing I did not take the time to make perfectly acurate in the model as I won't be building these any time soon but you can get the general idea.
 
I guess that is the one thing I wondered about. The response from the front horn only goes down to about 600hz before it starts droping off. I wondered if the midrange wouldn't be muffled by all the twists and turns of the horn. All of the compound horns we've built so far have been "crossing over" at or below 350hz and that sounded good so 600 might be a tad high.
 
The front compression chamber is tiny. The Phase plug has been specially designed to direct the high frequency from all eight drivers together. I don't see anything in the design to indicate a loss of high frequency. Hornresp doesn't model any drop in HF either compared to how the driver models on an open baffel the HF is not affected at all by the design in the model. If you look at the model great care was taken to preserve excellent HF response. It is hard to show the front horn phase plug design in 2D pictures but these are the best views I could get.
 

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