So for those interesting I finally published my ‘audiophile’ review of the Headphone (1) : https://www.pragmaticaudio.com/reviews/2025/09/nothing-headphone-1/
Basically, it is a fantastic ANC headphone but does need some PEQ tweaks to get the sound to be perfect.
But I did find some issues (possible recently introduced as I only noticed after installing the latest firmware), specifically there Bass FR changes as the volumes get louder and the Bass Boost seems a bit broken at the moment.
These are nitpick’s though as it is a excellent headphone, especially if the Presence region is tweaked with PEQ.
The final thing that might be of interest is I fully decoded how to ‘program’ the hardware PEQ / DSP on the headphone indepedent of the Nothing X app.
The hardware implementation of the PEQ is fantastic with filter types like Low pass and high pass filters and much more volume range changes than the Nothing X app allows. I would love to see the Nothing X app updated to support the more advanced PEQ capabilties of the headphone (1) itself.