Some times sounds like static. Not sure what it could be.Además de su bonito diseño lo más importante es la fidelidad del sonido.Good, detailed sound for the money. Bass is very tight, but a bit lacking. It can be increased easily with an EQ tough. The highs are pretty smooth.Crystal clear in all frequencies and base is just rightThe reviews had me expecting bass, but bass response is completely inferior to the $30-50 JVC, Altec Lansing, and EarFun earbuds I've used for several years. However, the midrange and high frequencies are clean and very pleasant for choral and acoustic music as long as I don't push the volume. I won't buy them again.I use this on stage while keyboarding with a worship band and couldn't be happier!The sound quality of this product is a little low compared to westones and alclairs(which is why the 4 stars). I prefer alclair, they are the industry standard in my opinion. But if you're a musician on a budget these will get the job done.These are very good IEM’s! As you can see cables are 16 core silver plated copper...well made and supper flexible for comfort. Ear tips are Spinfit for comfort and fit. The DAC is Dragonfly for using my cellphone and tablet for portable sound ;) ??