Received my SE6 a few days ago. What a masterpiece. A few points I can make 1. SE6 is a natural sounding iem. The bass has very high quality and dives very deep but the energy does no pass to the low-mid to give a warm sound. I think the upper mid is slightly recessed (at least compared to the bright/v-shaped ones), so the sound is more cool and serious than energetic and engaging. The treble extends very well, even to compare with a18t. 2. The real strength of SE6 is the preciseness of its sound, both spatially and temporally. You can feel the sound initiating from an exact point and decays naturally to its surrounding with time, just like a ripple from a stone tossed in water. This allows SE6 to have a very large, accurate sound stage (3D) and high resolution while the sounds are yet well mixed -- trying to avoid terms like holographic because I have no intention to advertise. 3. SE6 is very sensitive to the source, and is power hungry. I once thought its decay at upper treble was too much, until I realized that my Hugo2's high-freq roll-off filter was turned on (lmao, especially considering that many ppl complained the filter had no actual function). Seems they spent some real effort on tuning so that you are more likely to screw things up rather than to improve. The difference between lossy and lossless music is larger on SE6 than other iems I listened. I don't think SE6 performs well on common portable devices (e.g. iphone). It just sounds without its sound signature. Even on Hugo 2 I have a bit issue with its dynamics -- should be better to match with its outstanding transient response. It is questionable whether this piece is really designed for portable music.