FiiO - FH11 (Ex-Demo Unit)

In their pursuit of creating the perfect dynamic driver, the FiiO development team took inspiration from the materials used in their high-end FH15 and FF5 IEMs. This led to the creation of a 10mm carbon-based diaphragm dynamic driver for the FH11. The carbon-based diaphragm with a tensile strength of 9 times that of a steel and 1/4 lighter than beryllium ensures a highly responsive driver capable of handling rapid transients with minimal distortion, thanks to its ability to maintain stability during movement. To complement the dynamic driver's sound characteristics, the FH11 incorporates a custom-balanced armature driver dedicated to reproducing the treble region with exceptional resolution. This armature driver delivers clear sound and adds a touch of warmth, contributing to an enjoyable listening experience for music enthusiasts.

Hybrid IEMs, like the FiiO FH11, are skilfully engineered to create a seamless integration of various drivers, enabling each driver type to showcase its strengths. To accomplish this, the FiiO FH11 unit is cleverly divided into three chambers at the rear, with a damping control system in place. This ingenious setup prevents air pressure changes between the chambers from affecting one another, effectively reducing distortion for each driver. As a result, the drivers operate more independently, leading to improved bass extension and responsiveness, ultimately enhancing the overall audio performance of the IEMs.

Apart from the innovative conch-like design of the FH11, there's another remarkable feature - the C-shaped acoustic flute - contributing significantly to the sound quality, especially in the bass region. As air flows through the FH11's internals, the C-shaped acoustic flute enhances the air's viscosity and lowers the resonance frequency. This improvement improves the quality of both mid-bass and sub-bass frequencies. Consequently, you can experience a more cohesive and powerful rendition of sounds like drums beating, providing a truly immersive and engaging listening experience.

Concerns about the harmony between the balanced armature and dynamic drivers in the FH11 are understandable. Yet, the FiiO development team has dedicated significant effort to ensure a seamless and pleasant listening experience with these drivers working together. The carbon-based dynamic driver delivers powerful and atmospheric bass, adding an impressive dimension to the music. Meanwhile, the custom balanced armature driver expertly handles the high frequencies, emphasising specific points like 14kHz and 18kHz to allow you to appreciate the brilliance of instruments such as the flute and cymbals. The result is a smooth and enjoyable sound that combines the best of both worlds.

FiiO drew inspiration from the "conch" for the FH11's design, crafted using zinc alloy, lending it a unique and flowing appearance. The zinc alloy undergoes die-casting, polishing, and electroplating, resulting in a durable and stylish build capable of withstanding everyday use. The die-cast shape also creates a slightly uneven internal surface, effectively reducing sound wave convergence. As a result, standing wave generation is minimised, leading to a purer and more refined listening experience.