Hi All,
I've published a 604-8H crossover filter schematic on my web pages at http://home.earthlink.net/~jmarkwart/ Take the link from my home page to the 604-8H schematic and then use the download button. The file is a 200Kb pdf.
I'm still working on an updated 604B schematic that includes Mid Freq EQ - will be a few more days....
Many thanks to Jim Easley for his kind assistance in converting my scribblings to a readable document!

Jeff