Instruct: Classify Amazon reviews into positive or negative sentiment
Query: One ear gone out of the box

First of all, as soon as these arrived, only one ear worked. And Amazon said they couldn't exchange them, so I returned them for a refund.These were purchased for work, so I could keep all the noise out and the music in. It seemed -- with one ear, mind you -- to do a pretty good job of keeping noise out, but when I took them off, I could clearly hear the music from a good foot away.The sounds was quite warm and rich, but obviously I can't give a proper review as they weren't entirely functional.