So I have yet to disassemble these headphones but if I have the headband in any adjustable position I can have a hand on each speaker, rotate (supinate) the right speaker so that your palm is facing away from your face and rotate (pronate) the left speaker so that your palm is facing opposite of the right. Full signal gets the right side playing as soon as I do this twisting motion. It only works one way and not the other for me.
Im getting there with it. I just need to begin disassembly to isolate the issue but I had to share this with everyone.