BN9 has two innovative designs:
1. The rear unit leaves a huge space for the front cavity, and through the deep excavation of the front cavity, the front volume is successfully expanded to about 10 times that of conventional headphones. This design is more conducive to the performance of overtones, making the sound more musical. (Overtones are a tiny part of the sound, but they play a vital role in musicality, not only related to the timbre, but also the analysis and charm of the sound are related to it).
The rear unit leaves a huge space for the front cavity, and through the deep excavation of the front cavity, the front volume is successfully expanded to about 10 times that of conventional headphones. This design is more conducive to the performance of overtones, making the sound more musical. (Overtones are a tiny part of the sound, but they play a vital role in musicality, not only related to the timbre, but also the analysis and charm of the sound are related to it). These designs of BN9 have the high resolution and high separation sound effects similar to those of coil plus iron in terms of sound quality. At the same time, it adheres to the integrity of the sound frequency of the single unit and the consistency of the sound phase, presenting a passionate, energetic and layered music world for music lovers.