Bilateral total of 12 Balanced Armature units, covering high ,mid and low triple analysis, Frequency response range is amazing up to 6Hz-47000Hz Acoustic field location is wide, accurate and natural Compared with the classic 30095 high-frequency Balanced Armature unit, the 30012 Balanced Armature has a brighter tone and high-frequency extension performance, and the high-frequency performance jumps one step!