On Mon, 31 Mar 2014, Moshe Werner wrote:
I can't really talk about high end desks, but in
my midrange Soundtracs
Topaz desk (which has a quite nice EQ)
it is certainly serial. I've attached a pdf of the EQ section schematics.
Would be interesting to know how others did it.
Ah yes, makes sense. The parallel circuits I have seen are simple
low/mid/high controls with no q or frequency control. One network between
opamps or in the feedback line. Parts count probably had more to do with
design than quality.