The KZ AS24 earphones feature an enhanced electronic frequency division. Improved electronic frequency division has further optimized the continuity and smoothness of triple frequency. Combined with a brand-new reed structure design, it shows you a full-bodied and authentically natural sound quality. We specifically designed a "Trident" reed for HiFI earphones, which is more accurately centered between the magnets. This design can enhance sound density, reduce distortion, and achieve better transient performance. They have one tuner on the top and one on the side of the chamber, each with four level switches. Flipping the switches allows you to freely adjust and control your earphone's low, medium, high, and ultra-high frequencies. The earphone's cavity model was designed and finalized based on the big data of many users' auricles and ear canals, providing listeners with a comfortable wearing experience. It is made of lightweight and skin-friendly resin material, which is comfortable to wear for a long time.