Originally Posted by
sscywong
Standard 3.5mm plug works for Y and PEY seat
For J you need the triangular two leg plug (don't know how to describe it correctly but hope you understand what I mean...)
This is the type:
https://www.amazon.com/VONOTO-female...dphone+adapter
They are pretty easy to find online because a number of airlines' premium seats require two-pronged headphones. (I assume to discourage theft of the two-pronged headphones the airline supply to premium passengers?)