What does coaxial sound mean?

Coaxial sound generally means that the bass unit and the midrange unit * * * use a sound cavity. Simply put, the midrange speaker and the woofer overlap. Many earphones are just like this, which is not novel and has no advantages. It is just because it is difficult for a small box to have all the speakers and it is unwilling to clean and sacrifice the alto or bass unit. It is a compromise way invented.