Excuse me,how to DIY amiron home cable? 2*3.5 to 3.5?

like this?

Do you have a multimeter on hand?
If so, plug in the jacks into each side of the headphone and measure resistance between T, R and S for each.


Looks correct to me, but as Maze said, best if you have a multimeter and confirm it yourself.

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Thanks for your reply, I’ll give it a try

Thank you very much, I’ll give it a try