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i,d like to know too
This is simply astounding. I built a few planar headphone drivers using my 3d printer/ some N50 magnets a number of months ago... Not as cool anymore, I didn't see this thread....
The quality of your work is inconceivable!!!
Hello! Sorry for couple of month without updates!
Finally yesterday I've received my custom membranes for 10 pairs of headphones. They vary from 34.8 to 35.3 ohm. I consider this to be a good result.
Macro shot of traces. You can see what quality I've finally achieved.
Also I've made a first set of inner parts from fiberglass plastic.
My custom ordered magnets will be installed in them
Membrane itself will be glued here:
Ordered 300 pcs of N52 grade neodymium magnets. Expensive, but worth it.
Test assembling without membrane
Force of magnetic repulsion is HUGE
I hope you like my work. Tomorrow I'll assemble membrane and magnetic system in headphone cup
I like this work! I was considering buying some custom magnets too. I am working on a small in with a larger magnet company (in China), but I am kind of curious about how you got yours. I was thinking about etching my own pyralux (good call!!!!) material, but it seems like you are able to get them fabricated elsewhere? I was toying with either a photoresist etch (better) or 3d printing a removable trace on the copper (faster). So cool to watch this unfold...
I've ordered my custom pcb on pyralux in local factory in Ukraine. Trace is 0.25 mm wide. Not really good idea to make it on your kitchen
Wow, stunning work.
It's certainly been worth the wait. Looking forward to the next update
Thanks. A few more photos how I assemble mebranes for left and right channel.
I'm proud that I achieved a big square without any compromises. That took me a long time.
Very nice and beautiful work. By the way, how thick is your spacer?
3mm per side
Wow. That's a lot thicker than electrostatic's.
Yes, but it can move much more air.
Yes, I understand. You also don't have to tension your diaphragm so tight and you get better bass that way too.
How thick are membranes?
12 um capton + 7 um copper.
Sure you understand You're the author of the most outstanding DIY esl headphones!