Headphone equalization

[grammefriday]

I have been reading a number of headphone reviews and quite a few have mentioned that equalization is needed for headphones to get the best out of them. Pardon my ignorance but can someone enlighten me on this matter? 

Thank you

[stereodave]

Basically it's boosting or attenuating various frequencies to compensate for a given headphone's output, or just to adjust the output to suit your own preferences, such as boosting lower bass. The supposed ideal is not a flat frequency response, see the link about the Harmon Curve:

https://headphonesaddict.com/harman-curve/

 

[BugPowderDust]

If you are using roon there is also this: https://blog.roonlabs.net/how-to-roon-optimizing-headphone-audio-with-opra/