https://www.innerfidelity.com/content/headphone-measurements-explained-frequency-response-part-one Hi Garuspik, This article from innerfidelity has the methodology to analyze headphone response, I think the 300Hz test is the best, because even with ordinary microphone is possible to measure...

Hi Garuspik, I suggest another way to you have a product to sell and continue developed your headphone. You could try to find a chinese headphone to use as a donor, like supelux hd-330 ou some wood headphone from alibaba express, then you develop a 3D print model for internal parts and provide...

Hi Garuspik, Congratulations, great Project, I am developing a DIY Planar to, and thanks to open your projects to community. I think its very smart idea to use a diamagnets bars, because it’s a simple way to guaranty a magnetic field without a metallic mask to provide a magnets short cut...