Instead of using the so-called fancy diaphragm material, we used the most common 6 microns thick PET diaphragm into the driver on KZ EDCX. At the same time, we use four layers of the voice coil to enhance its output performance. Additionally, we by adjusting the height of the voice coil to accurately adjust the location of the high-frequency formant, by adjusting the damping to control the sensitivity of low frequency, by adjusting the size of the driver’s cover aperture to control the height of the ultra-high frequency formant, by compressing the volume of the internal space of the driver to control the position of the 2-3 kHz formant and assist in controlling the position of the ultra-high frequency formant. We finally completed this driver through the above technical adjustment and compared similar products’ FR curves and distortion data to ensure that KZ EDCX can compete with those high-priced and so-called professional Hi-Fi dynamic lEMs.