FiiO FD3 Earphones hi-res 1DD in-Ear Monitors MMCX Connector Flagship-Level DLC Diamond Diaphragm 4 Strands of high-Purity monocrystalline Copper Wires (Black) Condition is Open box. Shipped with USPS First Class Mail. [Flagship-level DLC diamond diaphragm, for an amazing, powerful sound]: The FD3 headphones benefits from the numerous advantages of FiiO's new dynamic driver. The diaphragm is made of Diamond Like Carbon (DLC) which is both impressively rigid and helps to reduce unneeded distortion yet also surprisingly light, allowing the driver to have excellent transient response. The result is a driver with excellent sound quality and minimal distortion with the added bonus of being ultra-sensitive. [Flagship-grade acoustic prism, take your breath away]: The acoustic prism so effectively used in the flagship FD5 for great sound quality is also featured in the FD3. Like with the FD5, the acoustic prism system brings numerous benefits such as eliminating high frequency standing waves, enhancing overall sound wave diffusion, and even effectively solving the problem of time delay caused by sound wave propagation path in the cavity. This all leads to marvelous sound quality. [Better sound with semi-open design,makes you less tiring and the sound less forced]: The semi-open design of the FD3 based on FiiO's patented technology for balanced air pressure within brings several advantages. Not only does such a design lead to more natural sound, but it also effectively protects your hearing by balancing air pressure within the FD3 leading to less pressure on your eardrums. [2.5D film coating glass faceplate] The unique celluloid panel is covered with 2.5D film coating glass for a pure yet fresh transparent look. And the aluminum-magnesium alloy of the body makes the FD3 exceptionally light, making it easier and more pleasurable to carry around. And the aluminum-magnesium alloy main body is made in an industrial process combining five-axis CNC processing and hand polishing. [Well-equipped just for you] The well-received interchangeable sound tubes also make an appearance on the FD3, The cable adopts an expanded MMCX connector for easier cable changes; the curved audio plug design makes it easier to plug into; and 4 strands of high-purity monocrystalline copper wires for a total of 120 wires make your music and vocals simply vivid. Let our new earphones make your inner perfectionist be happy with the ability to dial in your sound perfectly. The well-received interchangeable sound tubes on the FiiO FD5 wired earphones that so well symbolize it as a flagship also make an appearance on the FD3 heaphone. While the outer diameter of the sound tubes is the same, the inner diameter differs for each sound tube. You could trust FiiO all the time, this time we also using a newly designed 12mm flagship-level dynamic driver for FD3 and FD3 Pro wired headphone. Inside the FD3's striking shell lies a driver with a robust magnet of 1.5 Tesla magnetic flux paired with an ultra-fine copper-clad aluminum Japanese Daikoku voice coil for an amazing, powerful sound. Flagship-grade Acoustic Prism The acoustic prism system, eliminating high frequency standing waves, enhancing overall sound wave diffusion, and even effectively solving the problem of time delay caused by sound wave propagation path in the cavity. This all leads to marvelous sound quality that will surely take your breath away.Striving for perfection The aluminum-magnesium alloy main body is made in an industrial process combining five-axis CNC processing and hand polishing. The pin-point precision of machinery and the delicate touch only possible by human hands come together to create a phenomenal piece in the FD3 earphones.Form and function arc into one The FD3 headphones has a simple, yet beautiful appearance based on the theme of curves. The unique celluloid panel is covered with 2.5D film coating glass for a pure yet fresh transparent look. And the aluminum-magnesium alloy of the body makes the wired earphones exceptionally light, making it easier and more pleasurable to carry around.Better sound with semi-open design The semi-open design of the wired earphones based on FiiO's patented technology for balanced air pressure within brings several advantages. Not only does such a design lead to more natural sound, but it also effectively protects your hearing by balancing air pressure within the FD3 leading to less pressure on your eardrums. This makes your listening experience less tiring and the sound less forced.The earphones cable of FD3 The earphones cable adopts an expanded MMCX connector for easier cable changes; the curved audio plug design makes it easier to plug into; and 4 strands of high-purity monocrystalline copper wires for a total of 120 wires make your music and vocals simply vivid.Earphones cable and plugs of FD3 Pro The FD3 Pro IEMs comes with an exclusive cable made of high-purity monocrystalline silver-plated copper, with 8 strands of 19 wires each for a total of 152 wires braided together in Litz Type 2 style. In addition, the cable features left blue and right red markings for convenience as well as interchange audio plugs, allowing you to freely switch between 2.5/3.5/4.4mm plugs depending on your source. With this cable, every music note has never been clearer!Extensive set of accessories (1) Balanced ear tips*3 pairs (SML) (2) Bass ear tips*3 pairs (SML) (3) Vocal ear tips*3 pairs (SML) (4) Foam ear tips*2 pairs (5) Cleaning brush*1 (6) Carrying case*1 (7) MMCX assist tool*1 (8) Interchangeable sound tube*1 pair (9) User manual*1