May I remind everyone that Doug's system is pretty advanced. The fact that his EQ sounds best when set to "Flat" is not typical.
He's already carefully compensated for quirks in his system by (a) purchasing expensive equipment that comes without as many quirks, (b) giving fine control over each component speaker's level with L-pads, and (c) crossing over everything carefully.
Most people don't spend that kind of money/time on their systems and therefore need more EQ correction than Doug needs.
But I will agree that, before you even TOUCH the equalizer, you should carefully balance your amp gains and crossover settings. Get it sounding the best you can with a flat EQ first, then use the EQ for the remaining corrections.
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Tony Fabris