BASN is a professional in-ear monitor headphones brand. Our earphone structure engineers have studied thousands of custom earphones, finally, they find one that compatible with most people. What's more, many musicians, vocalists, drummers, guitarists, keyboardists, bassists, and audio mixers are invited to refine the sound and recommend it to their band members. We name this earphone to be "Bsinger", and we have developed another series of ear monitors based on it. The triple drivers series of "Bmaster" and "MMCX", the quad drivers series of "Metalen", the five drivers series of "Bmaster 5", the planar driver series "ASONE" and "MTPro" and more. And the new IEMs are coming soon.