This is where the objective vs subjective argument comes in. With Dirac in the chain my frequency response was flatter and sloping in a variety of Harmon curves as shown below, so objectively they measured better, but subjectively sounded worse. The only way I can describe the "worse" is with the subjective verbiage used above. As an example, without Dirac the reaction I get from people who sit in the listening position and hear the illusion of a three-dimensional auditory event is "WOW, I didn't know that was even a thing!" But with Dirac in the chain, that reaction vanished. It's tonally corrected but sounds "flat" and less immersive. I'm as much of a objectivist as you can get, but I believe since Dirac is measuring and corrective for both the direct and reflected sound reaching the microphone, it's over correcting for something that's not wrong in the first place. As you can see from my original graph I have an excellent uncorrected in-room response, adding Dirac seems (subjectively, I know) to ruin it. Not sure what else to tell you. If you're in the area come have a listen and hear for yourself.
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