The FiiO FH5S is an in-ear headphone featuring four drivers. Each earpiece houses two Knowles balanced armature drivers and two dynamic drivers. This combination ensures that the FiiO FH5S covers a wide frequency range, presents a large and accurate soundstage, and delivers a dynamic, powerful, and detailed sound. FiiO has also exercised the utmost care in fine-tuning, perfectly matching the four drivers. The result is a sound with robust bass, clear vocals, and exquisite highs, making it enjoyable even after hours of listening. For those who wish to customize the sound to their personal taste or a specific music style, there are three switches on the earpiece that allow direct control over the playback of bass, mids, and highs. The design is semi-open, which gives the soundstage a particularly spacious quality, allows for fatigue-free listening, and gives the FH5S a distinctly elegant appearance with its rose gold grilles in a black aluminum-magnesium housing. The headphone cable is made of high-quality silver-plated copper wires, and conveniently, two connectors (3.5 mm, 4.4 mm) are included, allowing the FH5S to be used with many portable playback devices. The cable is routed over the ear, ensuring that the earpiece sits perfectly in the ear and that the weight of the cable does not pull the earpieces down. The package includes five different types of ear tips. The ear tips have a significant impact on the sound of the headphones. FiiO has taken this into account and included a wide selection of ear tips with various sound signatures and sizes. A practical storage case is also provided.