Instruct: Classify Amazon reviews into positive or negative sentiment
Query: These "stereo" headphones only work in "mono" mode most of the time

It seems the pin is improperly designed - jiggling it in the ipod or laptop sometimes helps the sound come out in both ears, then it randomly and extremely annoyingly flops back to mono.Superb sound, but what good is great sound if a basic thing like getting sound in both ears does not happen?They replaced the pair I bought with a fresh pair, same problem. I tried it across several media, ceteris paribus, same problem.Don't throw your money away on these. Shame, because in the 10% of the time it works in both ears, the sound is stupendous!