Efficient Driver Configuration. A 10MM specialized dynamic driver is responsible for bass, and a custom balanced armature driver is responsible for mids and highs. Which not only makes up the bandwith but also brings hexa a smooth high frequency performance. _ New Generation DLP 3D Printing Technology. The DLP 3D printed cavity from HeyGears is equipped with its own medical grade high transparency resin, internal coloring and delicate surface grinding process. _ Excellent Measurement. Hexa has appropriate bass gain and high frequency amplitude response covering certain HRTF characteristics. Hexa offers a more sufficient bass diving and the connection between bass and mids is more natural. _ High Quality Cable. Four strands of high quality silver plated cable, combined with the universal 0.78 2Pin interface, achieves excellent sound quality, and expands the possibilities by changing cable. _ Earphone Specification : Driver : 1 Dynamic Driver + 3 Balanced Armature Impedance : 20.5Ω±15% @1kHz Sensitivity : 120dB/Vrms @1kHz THD : THD≤1% @1kHz (94dB) Frequency Response : 8Hz-40kHz