I like the old DJ headphones and always used them. Heck in my youth people made fun of me because “they’re old school”. In the last couple of years they are making a coming back since the “retro” look keeps sticking it’s ugly head back.
Anyway, A while back I bought some cordless headphones and they never worked right since day one so I decided to gut them and rebuild it but as a wired pair.
Here is a typical stereo headphone wire diagram
I am thinking to build a headphone amp as well. I need to check and see if I have the parts.