FiiO FH5s 2BA+2DD Quad Driver Hybrid In-Ear HiFi Stereo Earphones MMCX High Purity Cable Replaceable Plug 2.5mm/3.5mm/4.4mm (Black)

[All-new acoustic design] 12mm beryllium plated diaphragm + PU gasket dynamic low frequency driver. This driver has deep, powerful and controlled bass. 【6mm Beryllium Plated Dynamic Mid-Frequency Driver】Improved sensitivity, smooth coherency and reduced distortion --Time-tested Knowles TWFK-30017 high frequency balanced armature, clean and soothing vocals and exquisite treble. [Semi-open design of rear cavity] Quickly relieves air pressure in the ears - leading to more comfortable and longer listening sessions. 【3 Sound Adjustment Switches, 8 Types of Sound】FH5s electronic crossover technology allows you to precisely adjust the sound with 3 sound adjustment switches. Impedance, bass, mid, and treble adjustments vary depending on the music you listen to and your preferences. [Twist-lock swappable plug] Twist-lock swappable plug allows you to switch between 2.5mm/3.5mm/4.4mm heads, covering a wide range of scenarios.