The bass is the basic framework of the voice is the voice of the flesh, Alto, soprano voice details reflect. It is very limited, but it is the sense of the other senses of the human being! On the audio and home theater reflect the need for audio program source, the weight of the bass is only in a specific program source exists and needs to be restored, it can make the program source reduction more robust, without it, it gives people a sense of power, energy. For example, in a movie theater or in reality, we can feel the strength and energy when the plane took off when the shock, but if we do not have the home theater configuration of the home theater is not reasonable, and people can not feel the shock, but only this.