It worked sometimes, but was very fussy about the fit. If not far enough then no sound in one channel, but also if I pushed in too far in the same. Either one channel only, or both channels but apparently just in mono. Mostly if I fiddled around, I could get it right, but now whatever I do, I can't get it to work properly. I've tried reversing the cable, and fitting it to both right and left ear cups but same problem. As I say, no problems with the Chinese cable.