The FiiO LC-2.5, LC-3.5, and LC-4.4D are high-quality audio cables designed for audiophiles and music enthusiasts. These cables are intended for connecting audio devices, such as headphones or amplifiers, to various portable audio sources. Each model corresponds to a different connector type: LC-2.5 uses a 2.5mm balanced connector, LC-3.5 uses a standard 3.5mm single-ended connector, and LC-4.4D employs a 4.4mm balanced connector. These cables are typically constructed from high-purity OFC (Oxygen-Free Copper) to ensure optimal audio signal transmission and minimal loss. The design may include braided or twisted wiring to enhance durability and reduce interference. The connectors are often gold-plated to improve conductivity and corrosion resistance. The overall build quality emphasizes flexibility and longevity, making these cables suitable for both everyday use and portable applications. The FiiO LC series is compatible with various music players, DACs, and amplifiers, providing versatility in connectivity options while catering to different listener preferences.