http://www.celestion.com/pro/pro.htm
I've heard that these folks know a thing or two about this kind of stuff,
This is a good place too, and has some info for jesse and James
http://www.webervst.com/sptalk.html
it might take a while to find what you need, but you can also ask questions there, and who knows, you may even get an answer......... Good Luck
