I am not sure how they came off its almost like they were punched out with a hole punch. I could easily hear and discern every instrument and they were separated perfectly. You can use it in single or dual mode which I really like. Great new style, excellent fit, super comfortable, stylish that go with a variety of dress codes. I wear these every day in my top earlobe hole. I was hopeful and skeptical and just knew Id have to send these back. I am someone who is always shopping in the $20-30 price range for headphones. They fit very well and had very good battery life. ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????100?????????????????????????? It jams into my foot every time I take a step ;(.