Hmmm...it occurs to me that you could also arrive at a "matrix-ish" result with a Frap 321 in place of the Shades. The fit's the same, too. Not a "true" matrix, sure, but it's in the general ballpark.
-- Lugia
isn't it just 3 utility mixers that feed 3 3-way passive mults (that can chain) ? so nothing like a matrix mixer
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities