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Here is a better explanation about why room curves are not using flat as a target. From here:
Both Dr. Olive's initial speaker measurements, the JBL Synthesis measurements, and the B&K curve agree that high-quality speakers measuring flat in an anechoic chamber tend to have a ~1dB/octave "room gain" curve when placed in a good-sounding room with no equalization.
Read more at https://www.innerfidelity.com/conte...man-listener-target-curve#lXl6fEI9EQkrbvgp.99
Notice measuring flat in an anechoic chamber results in the room measurement having a 1 db/octave gain in response as frequency ascends. So speakers should have flat and smooth response. If you have to measure them indoors your measurements is effected.
Both Dr. Olive's initial speaker measurements, the JBL Synthesis measurements, and the B&K curve agree that high-quality speakers measuring flat in an anechoic chamber tend to have a ~1dB/octave "room gain" curve when placed in a good-sounding room with no equalization.
Read more at https://www.innerfidelity.com/conte...man-listener-target-curve#lXl6fEI9EQkrbvgp.99
Notice measuring flat in an anechoic chamber results in the room measurement having a 1 db/octave gain in response as frequency ascends. So speakers should have flat and smooth response. If you have to measure them indoors your measurements is effected.