TIDAL Audio Intra Power Amplifier review

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Harman curve

The "absolute/measurements" school of audiophiles, i.e. the ones who firmly believe that flat frequency response of 20Hrz - 20kHrz is the ultimate target, take note. Research done at Canada’s National Research Council (NRC) and Harman International suggests that (and this is true to my experience) without a few decibels of domestic in-room bass boost (below 100–150Hz), most people find that a loudspeaker sounds thin and lacks bass impact and fullness. See also Harman Curve article at Headphonesaddict. BTW, when I owned Tact Audio RCS 2.2X digital pre-amp and room correction system I tested flat 20Hrz - 20kHrz correction curve, and it just sounded awful, lifeless.