Created this EQ profile for the Nothing Ear (2024) based on the frequency response of the Hisenior MEGA5EST.

Of course it doesn’t sound exactly the same but to my ears it’s a major improvement on the stock nothing sound.

Enjoy

6 days later

Not bad, but using 5128 measurements will be much more accurate as they reproduce the human ear with much better detail.

That’s how your EQ graphs on 5128 - I’ve uploaded a 5128 measurement of the Nothing Ear so you can refine your EQ more accurately. Digitised it off the SoundGuys review and I think they might have overemphasised the bass a bit but the rest sounds consistent to my ear.