These things are really good, excellent build quality, beautiful appearance, but the sound is dull and lifeless. After comparing to many other headphones I have, the sound is not competitive in this price range. Many sub-$30 hybrids sound better. Tri i4 sounds very dull. Bass is limp. Means don't inspire. The sound stage is really very narrow for this price. On the other hand, the high frequencies are amazing! Man, the Knowles driver really sings! The highs are so crisp, bright and detailed BUT AT THE SAME TIME SMOOTH! That aspect is great. But the bass and mids can't keep up. Maybe a better dynamic driver will fix this problem. Maybe an extra ba too? Anyway, I couldn't justify the price. I had to go back.
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