FIIO FD3 Silver (FIO-IEM-FD3-S) [Ships from an authorized Japanese retailer, includes serial number] FIIO Wired Earphones, Dynamic Driver IEM,

[Newly designed 12mm dynamic driver with DLC diaphragm] The newly designed 12mm dynamic driver combines a powerful magnet with a magnetic flux density of 1.5 Tesla and a voice coil made with ultra-fine copper-clad aluminum wire from Daikoku, Japan. The diaphragm also features the same Diamond-Like Carbon (DLC) diaphragm found in higher-end models. Its exceptional rigidity reduces unwanted distortion, while its ultra-lightweight construction ensures excellent transient response. The DLC diaphragm, combined with a magnetic circuit delivering superior driving force, minimizes distortion and boasts ultra-high sensitivity, resulting in a high-performance driver. [Acoustic Prism System for Ideal Acoustic Characteristics] The highly acclaimed Acoustic Prism, first used in the high-end FD5 model, is now also included in the FD3/FD3Pro. Developed from technology used in acoustic tuning in the speaker field, the Acoustic Prism System, now used in earphone drivers, offers many benefits, including eliminating high-frequency standing waves, enhancing sound wave diffusion across the entire frequency range, and effectively solving delay issues caused by the sound wave propagation path within the cavity. [Semi-open design reduces pressure on the ears and promotes a more natural sound] FIIO's unique semi-open design effectively releases pressure inside the cabinet, allowing the driver to move more smoothly and produce a more natural sound. In addition to benefiting sound quality, it also effectively protects your hearing by balancing the air pressure inside the ear canal and reducing pressure on the eardrum. This reduces listening fatigue and allows for longer listening times. [Sound control with user-replaceable sound tubes] The replaceable sound tubes used in the higher-end FD5 model have also been adopted for the FD3/FD3Pro. By switching between two types of sound tubes with different inner diameters, you can adjust the sound to suit your environment and preferences. We recommend selecting the larger inner diameter tube (black) if you prioritize detailed reproduction of high frequencies, or the smaller inner diameter tube (red) if you prioritize a well-balanced, soft sound. *The smaller inner diameter tube (red) is installed as standard. [A hand-finished aluminum-magnesium alloy body creates a luxurious appearance] The faceplate features a celluloid panel covered with 2.5D film-coated glass, creating a luxurious and transparent look. The aluminum-magnesium alloy body of the FD3/FD3 Pro is manufactured using a process that combines 5-axis CNC machining and hand polishing. The high precision of precision machining and the delicate touch of artisans combine to create a simple and beautiful exterior with a curvaceous design. [Includes a meticulously designed, four-strand, 120-core high-purity single-crystal copper cable] The FD3 comes with a cable featuring MMCX connectors and four sets of high-purity single-crystal copper wires for a total of 120 cores. The gold-plated L-shaped 3.5mm plug reduces strain on the plug and reduces the risk of breakage.