FiiO FH15 Hybrid In-Ear Wired Earphones with 3.5mm/4.4mm MMCX Cable (Black)

The 10mm carbon-based diaphragm dynamic driver in the product is designed to provide exceptional performance. The carbon's lightweight, strong rigidity, and high internal resistance allow the dynamic driver to quickly start and stop movements, responding efficiently to changes in the input signal.

With a diaphragm that is 9 times stronger than steel, this large 10mm dynamic driver delivers impressive sound quality. Compared to Beryllium, the same volume of the carbon-based diaphragm is 1/4 lighter, showcasing its superior properties.

For the mid frequencies, the FH15 employs a custom Knowles ED-30262 BA driver, which produces lush vocals and a more musical sound. The treble is handled by two Knowles RAD-33518 BA drivers, capable of high treble resolution and capturing every detail in the music, resulting in an airy and truly immersive sound.

To optimize the frequency response, a custom notch filter has been implemented. This filter improves the response between 1 kHz and 4 kHz, resulting in denser-sounding mids that give vocals and instruments more realism without sounding thin.

The S.Turbo patented design is used to hit the desired mid and treble sound goals for the FH15. This design filters the higher frequencies produced by the bass driver through a low-pass filter, reducing the frequency response overlap between the bass and mid drivers. This ensures more coherency between the different drivers and a more balanced frequency response, leading to a cleaner and more natural sound.

The FH15 also features interchangeable sound filters, providing users with the flexibility to customize their listening experience:

• Red filter: Enhanced bass, for a bold sound
• Black filter: Balanced sound, transparent and clear
• Green filter: Exquisite treble, highly resolving

The tuning of the FH15 approaches the Harman curve for in-ear headphones, with a particular focus on the lower midrange. This tuning provides a more natural and organic sound, making the FH15 an excellent choice for a wide range of music genres.

In terms of the overall frequency response, the FH15 delivers excellent performance. The 5-6 kHz region is smoothed by the notch filter, ensuring that the resolution and clarity are maintained without any harshness.

Accessory-wise, the FH15 comes with a silver-plated monocrystalline cable with interchangeable plugs, allowing users to further customize their listening experience.

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