1 DD 4 BA 8 EST design | 8 Sonion electrostatic drivers | 4 custom Knowles BA

Lithium-magnesium alloy diaphragm dynamic driver | Electronic and physical five-way crossover | Patented S.Turbo acoustic design |Titanium construction  Mixed gold, silver, and copper cable | Exclusive serialized nameplate

3 audio plugs included

1DD 4 BA 8 EST Flagship IEMs

1 DD 4 BA 8 EST design per side

To get the best sound quality possible, the FX17 features a design of one dynamic driver, four balanced armature drivers, and eight electrostatic drivers per side. A five-way crossover has been precisely tuned to balance energy distribution among the driver and ensures each unit operates in its optimal state, resulting in a grander soundstage and more natural sound.

Eight electrostatic drivers with a truly airy feeling

Electrostatic drivers have exceptional high-frequency extension easily reaching 50kHz and sense of air that gives the listener a grander soundstage. Their downside is that their sensitivity is only 99dB/mW, which is low compared to the 110dB/mW sensitivity typically found in balanced armature and dynamic drivers - leading to the 'masking effect.' Thus, the FX17 uses 8 electrostatic units to increase sound pressure levels in order to make the electrostatic drivers more audibly perceptible as they handle the high and ultra-high frequencies above 6kHz, rather than just be for decoration.

*The masking effect refers to the phenomenon where the human ear's sensitivity to high-frequency signals within the presence of high-volume level low-frequency signals is reduced.

Four custom Knowles BA drivers

The FIIO FX17 uses two Knowles balanced armature driver composite units that handle the mid and high-frequency sounds. Each of the composite balanced armature driver units is divided into two parts, one part responsible for mids and the other for mid-high frequency – leading to denser mids and a more transparent sound and allows them to transition seamlessly into the electrostatic drivers. To achieve higher flagship-level vocal performance, FIIO, in collaboration with Knowles, custom-developed a 'Midrange Enhanced Balanced Armature Unit.' Acoustic vents have been added to the rear cavity of the balanced armature, which provide more sound energy reserves for the mid-frequency balanced armature unit to further tap into the driver’s advantages. The overall result is lush, mellow vocals that make the singer’s alluring voice seem as if it's truly right next to you.

Surging sound Patented S.Turbo acoustic design

Inspired by the turbos found in supercars, the FIIO Acoustic Center has meticulously developed the patented S.Turbo turbocharged acoustic design. It cleverly guides sound through a turbo-shaped structure to enhance the bass, making it robust and deep-extending. At the same time, it skillfully filters out excess mid and high-frequency information from the dynamic driver to ensure a smooth tonal transition between low and mid-high frequencies for a more powerful and rich sound.

Patent no.：ZL2018211416279

Resonant back cavity, acoustic balance

The FX17’s back cavity has been optimized for better sound. By damping with vents that have a diameter of only 0.2mm, the FX17 precisely controls the airflow and thus achieves air damping balance between the front and back cavities of the dynamic driver. Not only does this enhance the Q factor and amplitude of the dynamic driver, it also improves low-frequency extension, as well as enhancing mid-frequency clarity and transparency.

Electronic and physical five-way crossover

Pure titanium construction

The FX17 features a minimalist aesthetic, with a classic and natural curved cavity. The FX17’s shell ear shell cavity is made of high-density, high-strength titanium that is precisely milled from a single block and meticulously hand-polished. It is treated with vapor deposition which hardens the surface and gives it a lustrous finish, making for a beautiful display of light and shadow intertwined.

Flagship level「Comfort Zone」 Optimized wearing ergonomics

The FX17’s cable utilizes three different transmission materials – gold, silver, and copper - in order to take advantage of the strengths offered by the different materials. The gold, silver and copper are forged at over 1000 degrees and undergo secondary refining to form crystalline monocrystals to remove impurities and reduce transmission loss. Each of the three elements have their own advantages, which together result in significantly improved sound quality.

Mixed gold, silver, and copper cable

Exclusive serialized nameplate

Exclusive serialized commemorative nameplate Engraved for a truly special auditory memory

Gathered by music Resonating through aesthetics

Together we witness Eighteen years of accumulated acoustic essence

Three audio plugs included

Included with the FX17 are three swappable audio plugs – 3.5mm single-ended, 4.4mm balanced, and Type-C connector with built-in digital decoding and DSP, allowing you to enjoy high-quality audio no matter the device you are connected to.

The Type-C swappable plug features a built-in DSP audio decoding chip that supports up to 32Bit/384kHz high-resolution PCM, and balanced output. It also supports 8-band high-precision PEQ. Through FIIO's proprietary algorithm and the FIIO Control app or web interface, the PEQ allows one to simulate or correct the headphones’ frequency response curve. Additionally, one can also export, import, share, and save EQ curves.

Listen to what you love

22 pairs of ear tips included

Befitting its flagship hybrid IEM status, included with the FIIO FX17 are 22 pairs of various ear tips in different sizes* that ensure you will get a good fit with the sound signature you want. Among the ear tips included are the popular HS18, SpinFit, and HS20 liquid silicone ear tips.

 *Please refer to the packing list for details on included ear tips

Lithium-magnesium alloy is lightweight, rigid, and has a density of 1.6g/cm³ - making it an ideal material second only to beryllium for a dynamic driver diaphragm. When reproducing high-frequency signals with rapid vibrations, the lithium-magnesium alloy diaphragm has excellent mechanical properties thanks to its high internal damping – leading to significantly reduced intrinsic frequency resonance and distortion. It allows distortion to not exceed 0.2%, for a truly clean sound.

Hi-Res Audio certified

The FX17 is Hi-Res Audio certified, as established by Japan Audio Society (JAS) and Consumer Electronics Association (CEA). It is a testament to its ability to accurately reproduce audio the way it was meant to be heard.

Packing list