At first, when I bought these IEMs, they worked fine, and I didn’t feel the need to adjust the EQ however, that could come down to personal preference. After having them for a couple of weeks, they continued to work amazingly well. Then my friend, who also recently bought a pair, mentioned that the superglue on his ear tip came off. He warned me that it might happen, so I was cautious. A couple of days went by without any issues, but suddenly, the audio in my left ear cut out, and I haven’t been able to get any sound from it since. This really disappoints me regarding the build quality. As I said before, they sounded amazing, but the fact that the audio in one ear no longer works is frustrating.