[woodsyi]

Here is the CAD design
www.exodusaudio.com/images/Sealed.pdf

and the thread covering it.
http://www.audiocircle.com/index.php?topic=56855.0

The sub amp is $385 shipped each.
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-810

[2gumby2]

I have two of those Dayton Audio HPSA 1000W amps for sale at $250 each plus shipping. I used them for a couple of Bill Fitzmaurice designed horn loaded subs. Includes original boxes. I no longer need them since I will be using Face Audio amps for my Maelstroms.