Ni Coated Magnetic Balls
It is well known that the good or bad of speakers can affect the style of the entire sound system. Good speakers have their own personality. The sound quality of the speakers in the sound system is restored as a restore device, and the sound quality is directly expressed by the speakers. In other words, the speaker plays a decisive role in the overall sound system, while the magnet plays a decisive role in the speakers. The rare earth neodymium permanent magnet is a very good material for making the speaker.