Great post EEman. I for one would love to see you go deeper into the technical side of parametric eq. I think the ten band peq will be simple to set as long as a person understands what REW is showing for issues.

I do have a question. Does overall phase change with frequency based phase shifts in crossover components?

You also mentioned setting for a flat response. With stereo the common practice is to set a "house curve". Starting at or just below 200hz dial in a gentle slope to +3db at 20hz. Do we not do this any longer?