The new FiiO FF3S adopts aluminum alloy as the earphone cover, with matte surface treatment; compared with its predecessor, the whole visually presents a deep and delicate high-level texture; in addition, the aluminum alloy material gives the FF3S a lighter wearing experience, with the weight of a single unit of only about 3.9g, which is more sensitive to the human ear, the subtle change in weight can significantly reduce the pressure on the ear canal, FiiO FF3S compared to FF3, the weight of a single unit is reduced by about 52%, which makes it easier for long-time listening. Compared with FF3, FiiO FF3S is about 52% lighter than FF3, so you can listen to it for a long time.

FiiO FF3S is equipped with a beryllium-plated dome + PU suspension diaphragm moving coil combination, beryllium-plated diaphragm has high rigidity, lightweight features, reduce diaphragm split vibration, reduce non-linear distortion; and the choice of PU material as the suspension edge, its high internal resistance characteristics make the sound of the low frequency more bouncy and tough, the mid-frequency part of the human voice is transparent, the high frequency is more translucent.

• Impedance: 45Ω.
• Frequency response range: 20Hz-20kHz.
• Sensitivity: 105dB.
• Max input power: 100mW.
• Termination plugs: 3.5mm/4.4mm.
• Earphone pins: 0.78mm x2
• Cable length: 120cm approximately.
• Weight: 3.9grams.