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I'm aware they sound very different. However, reiterating, my point wasn't to claim the DT770 sounds virtually the same as the K371. Rather, to point out both are close enough to the Harman target to make difference in sound between the DT770 and K371 irrelevant to one's preference of the Harman target. For example, while the K371 has sub-bass more faithful to the target than the DT770, the DT770 follows the initial treble climb of the target slightly more closely. See what I mean?They not only look very different but without EQ they also sound very different.
The 1 dB difference in deviation from the Harman target is the average which doesn't really tell much soundwise like for example the typical Beyer peak that can be quite annoying.
Thanks for the detailed write-up.I think part of this is true between 1kHz and 20kHz but not for below 1kHz.
The lift in the lows is based on
A: preference of test subjects while determining the tonal balance
B: trying to mimic the bass boost one gets when playing a flat speaker in an average listening room.
C: the missing tactile feel (for lowest frequency body sensations are weighed in by the brain)
D: In some cases listening to headphones is done at lower than 80dB SPL average so there is loss of lows due to equal contour loudness effects.
Some or all of the above is why people prefer some extra bass and that is incorporated in the Harman target which is based on listening experiences.
As for the sound changing around the ears (actually when hitting the ear drum) this happens with sounds from headphones as well as speakers.
The only differences are the angles and speakers being more of a point source where headphone drivers, being close to the ear are relatively big 'walls' emitting sound (so not a point source)
The tonal change is the difference between sounds coming from the front and sounds coming from the side. There are differences which are individually different due to Pinna shapes and above 2kHz even age or 'damage' dependent.
The brain takes care of that though it knows how reality sounds and uses that as a reference.
The same is true for sounds coming from the sides.
Then there is the channel separation and how the brain handles that.
You can't compare speakers to headphones. Different horses for different coarses. Sure one can try to emulate but it will never be the same.
It's a matter of letting the brain get used to it or use DSP to try to emulate. And this too will vary individually.
Such is the case for speakers. However, again, headphones tuned flat do not sound flat due to various parts of your ear changing the sound of transducers to greater degrees when the transducers are right next to them.Anything which will cross over mids is garbage, mids account for 60% of information in audio and only reason to want some boost in highs in my case is my age.