FiiO FD11 High Performance Earphones with Deep Bass and Detachable Cable (Silver)

The FD11 earphones are an entry-level offering from FiiO, boasting excellent craftsmanship and a comfortable wearing experience. Their sound quality is outstanding, with a refreshing and comfortable style that is well-suited for orchestral music, pop female vocals, and anime soundtracks, as noted by a Head-Fi reviewer.

The package contents include the headphone unit, a 3.5mm to 0.78mm 2-pin headphone cable, three pairs of HS18 ear tips in small, medium, and large sizes, and three pairs of balanced ear tips (medium pre-installed), along with a user manual.

Specifications-wise, the FD11 features a 10mm dynamic driver with a PU+carbon-based diaphragm, a frequency response range of 20Hz~20kHz, a sensitivity of 111dB@1mW (1kHz), and an impedance of 24Ω@1kHz. The stock cable is a 1.2m oxygen-free copper cable, and the single unit weighs approximately 10g, excluding the cable.

The carbon-based diaphragm in the 10mm driver ensures a highly responsive and detailed performance, allowing for quick transients with minimal distortion due to the minimal breakup during driver movement. The fine-tuned frequency response of the FD11 focuses on the dynamic driver's timbre, with a particular emphasis on vocals, making it a suitable choice for vocal-heavy, folk, and other music genres.

The symmetrical internal and external magnetic circuits, combined with the strong magnets, contribute to a quicker transient response, which benefits the treble performance. The dual-cavity dynamic driver design results in a speedy, punchy, tight, and well-defined bass response, appealing to those who enjoy a bit of thump in their music.

The C-shaped acoustic flute design is used to regulate the airflow in the rear cavity and optimize the performance of the mid-to-low frequencies. The liquid die-cast zinc alloy construction, with its slightly uneven internal surface, effectively reduces sound wave convergence and minimizes standing wave generation, leading to a purer sound.

The "double acoustic back chambers" further improve the control over the mids and lows, resulting in a mild V-shaped sound signature with a bass boost, making the FD11 a suitable choice for vocal-heavy and folk music enthusiasts.

In summary, the FiiO FD11 earphones offer an impressive combination of craftsmanship, comfort, and sound quality, catering to a wide range of music genres, particularly those with a focus on vocals and mid-range frequencies. The carbon-based dynamic driver, optimized acoustics, and sturdy construction contribute to the earphones' overall performance and appeal.

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