If music reproduction was 100% science, that would be correct. Unfortunately, for now (and some might even say forever), playback technology is both a science AND an art, which makes referring to a subjective expert like Mr. Harley necessary for a thorough evaluation.
Hi,
From my point of view, there is something that should be mentioned.
A DAC can probably be measured precisely because it is "digital".
A pre-amp and amp can probably also be measured more or less precisely despite them being analog.
But the main factor to "enjoy" music in the end is the "reproductor" : loudspeaker or headphone.
And measure those is quite a challenge :-(
Position of the headphones on your ear, wearing glasses, having a seal broken, having the HP too low ot too high on your head, having a bunch of hairs between the speaker and your ear... I think Amir does say it himslef when he writes that for some headphones he has problems adjusting the headphone to have a "good seal"... Just think about Oratory and how changing ears pads can alter measurments and turn a headphone from almost crap to almost perfect !
Position of the loudspeaker (close to a wall, close to a corner, next to a window, position in the room, resonances of the room...) make all measurement a little vain as how the end result will be in the end consumer's room/head. And how it will sound.
Thus, measurements are science for sure. And they tell about the capacity of a device to reproduce what's on the initial source (CD, BR, stream...).
Do they tell how you will like the sound in the end ? I doubt it.
I, for instance, do not like "heavy bass". I love deep low bass when it is controlled and does not eat up the rest of the musical message.
Measurements will tell me if a headphone will be "tailored" to my linkings... But those are just personal likings.
In the end, I almost always end up taking the reference Harman curve, and reduce the bass line slightly and I indeed achieve a sound that I like because it is "balanced"...
And measurements may of course be an indicator to "Does your device reproduce the sound as it was conceived by the engineer that mastered the record ?".
Eveything else is pure BS unless the "listener" was in the room and took part in the mixing and mastering of the record...
Regards.