Introduction Since there isn't too much info out there on the Tripowin Olina SE, I figured it would be helpful to add a review here. I'm going to skip the packaging etc...and just focus on the main factors: sound, fit/comfort, and comparison. I was perfectly happy with the sound sig and performance of the Etymotic ER4SE, but I needed an IEM that I could use for extended amounts of time during work as I found myself in an environment with quite a bit of noise (construction, loud neighbors). Unfortunately, the ER4SE's fit is horrible for long hours...