Open omega is my attempt at making a passive dynamic headphone that closely adhere's to the DF-HRTF of the B&K 4128C with a 10db downward slope from 20hz-20khz. The headphone was originally designed to be made via SLS. I've simplified elements of the design and assembly, making it easier to build at home. Video instructions and more info: https://youtu.be/d9SyIJi44J4?si=MpKiYIesISI80hwy

I want to add that Capra has made a 3D printable headband that works with omega. You can find it here: https://www.printables.com/model/1108653-capra-headband-v3/files