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Re:Ear Speakers – Research, Design, and Evolution by Azrael3000 on Tuesday August 13, 2019 @03:20AM (#20683523)
And they are "easy" to build yourself. I wrote a guide about doing so here [0] which is based on this enormous head-fi thread [1].

0: https://github.com/Azrael3000/headphone-guide 1: https://www.head-fi.org/threads/my-diy-electrostatic-headpho...

Re:Ear Speakers – Research, Design, and Evolution by wallflower on Tuesday August 13, 2019 @02:27PM (#20688806)
Wow, very impressive to DIY! It is one thing to do speakers DIY, quite another to make headphones, let alone e-stats.

For those who are interested in entry-level, non-DIY route

Drop (formerly Massdrop) has their variant of the classic Koss ESP/950 electrostatic headphones for around $500. They sold out earlier this year.

https://drop.com/buy/massdrop-x-koss-esp-95x-electrostatic-s...