P55 can reduce environment noise with balance,ensure the sound smooth and natural and play every note with details, having clean,transparent, noise-free high frequency part, being accurate and convincing for mediumfrequency, full and not exaggerating for low frequency. You can take anaudition of music of Taiyan Jin, the most popular singer currently. The resultis perfect and you will find the sound field of a bigger earphone is better thanthat of a smaller one. For instance, E80 can NOT create this feeling althoughit is also very good.
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