I thought I'd post this here since there's a lot of discussion around this headphone.
I find the E3s to be a bit brighter than Amir's measurements. There's a bit of extra heat in some vocals and distorted guitars sometimes have some edge to them. When I took a look at other reviewer's measurements, I noticed that some seem to pick up a bit of extra energy in the ear gain region from around 2k to 5k. Oratory1990, GadgetryTech, and DMS all appear to show this in their data, while VSG, Amir, and Jude don't.
I'm obviously no expert, but there could be a number of reasons for this:
- HRTF variation among different measurement setups and people
- Different positions for the headphones on different rigs. I know some people take multiple measurements with different positioning to get a feel for how the headphone changes, while others may not
- Minor sealing differences. I believe Dan has said these are more susceptible to seal issues than other headphones, though I could be mistaken so don't take that as gospel
- Unit-to-unit variation, though Dan Clark seems to have pretty good driver consistency
- It could be something as simple as how different people choose to display their data.
Whatever it is, I've found that my experience with the E3 matches the way Oratory has measured it, so I took his data and plugged it into AutoEQ. Here's what it looks like (I have smoothing turned on):
View attachment 391798
The blue line is the Harman 2018 target, while black is the actual measurement. It's still obviously very close to the target (stunningly so, as Amir and others have pointed out), but you can see the extra energy in the areas I was talking about above. I can also detect these peaks/valleys when I run test tones, so they're not just measurement quirks.
I then used AutoEQ's custom EQ function to develop the following filters.
This is the result:
View attachment 391800
This makes the sound just a bit smoother overall and helps lessen some of the extra bite that can exist on some vocals and guitar tracks. I don't bother EQing the rest of the frequency range as I don't notice the deviation from Harman in those areas as much in the treble. The small drop from 600 to 2k or so can also a bit of spaciousness to the sound, which can be a positive thing for headphones.