The FiiO FF1 earphones are not traditional in-ear headphones, but rather earbuds. Earbuds rest in the outer ear rather than being inserted into the ear canal, which many music lovers find significantly more comfortable. This is especially true when lying on one’s side, as earbuds do not apply pressure. Weighing only 3.2 grams per earphone, the FiiO FF1 is also exceptionally lightweight.

A common drawback of earbuds is their often weak bass response. To provide rich and powerful bass reproduction, FiiO has developed an Acoustic Resistance Pipe for the FF1, which enhances airflow and ensures solid bass. The dynamic driver is generously sized with a diameter of 14.2 mm, producing an energetic and voluminous sound.

The package includes six pairs of foam covers that create different sound signatures: enhanced bass, balanced sound, or a transparent, finely resolved sound with a focus on the highs. The earphone cable is replaceable and features 2-pin connectors on both earphones. The 3.5 mm plug is compatible with many portable music devices, and to use the FF1 with smartphones that lack a headphone jack, a USB-C to 3.5 mm adapter cable is included.

For those who prioritize a secure fit in the ear, the earphones can also be equipped with one of the three pairs of included anti-slip silicone rings. This makes the FiiO FF1 suitable for various applications: it does not press on the ear when lying down, provides a secure hold during sports, and thanks to the integrated microphone and cable controls, it can also accept phone calls or activate the microphone for gaming.