"Robust Materials" for a Robust Sound Magnalium Diaphragm DLC Gasket

With the FD15, we are sincerely bringing you into a new realm of sound. The all-new FIIO FD15, as the successor to the FIlO FD5, introduces a truly high-end driver designa magnalium diaphragm DLC gasket driver. By innovatively combining these two materials, not only does the FD15 deliver a spacious and relaxed natural sound, but it does so while achieving new heights in the reproduction of musical detail for truly transparent sound.

Magnalium diaphragm - A scientifically calculated blend of magnesium and aluminum that features high hardness and low distortion when moved for clear, detailed treble.

DLC gasket - DLC diamond-like carbon is known for being both rigid yet flexible, which means less breakup during movement and ultimately higher-quality sound.

Reinventing Sound with FD15 W-Shaped Gasket

FIIO's pursuit of acoustic excellence knows no bounds. The FD15 boldly embraces high-end audio design principles by introducing the W-shaped gasket design to earphones. Compared to conventional diaphragms of the same size, the FD15 boasts a 30% increase in effective vibrating area. With a larger effective diaphragm area and greater amplitude, the core acoustic unit can store more sound energy, delivering a denser and more solid listening experience.

Mid-Range Vocals, Simply Purely Good

Quality materials yield quality sound, and HiFi is no exception to this principle. The FD15 features a thoroughly refined mid-range, with genuine innovation in the usage of materials and new technologies. Once again, we strive to adhere to the philosophy of simply providing great, pure sound.

A Different Kind of "Big" 13.8mm Large Dynamic Driver

The FD15 explores higher levels of core audio performance by increasing the diameter of the dynamic driver to an astonishing 13.8mm. Compared to its predecessor, the FD5, this results in an increase in effective diaphragm area of approximately 40%. Moreover, the larger the dynamic driver, the more air it can push through, thereby improving the efficiency of electroacoustic conversion at its source. This enhancement elevates the overall quality and scale, allowing mid-frequency vocals to feel as if they are right next to the ear.

A "Sound" Entry into Excellence Ø8.6mm Long Voice Coil

Based on perfessional design principles, the voice coil diameter of the FD15 has been increased from the FD5's @6.2mm to Ф8.6mm. The longer voice coil copper wire directly enhances efficiency and power capacity, resulting in improved transients. The result is a cleaner, more natural sound that fully allows you to fully appreciate its charming mids.

Reliable Enough 1.5t External Magnet Design

The driver structure is of course one of the most important parts of a dynamic driver earphone. The FD15 draws inspiration from innovative acoustic concepts and adopts a powerful external magnet design. The magnet volume has increased by about 69.5%, and the magnetic flux density can reach up to 1.5T. This abundant and uniform energy supply ensures that this high-end driver consistently works well.

"Tesla Valve" Bass Enhancement Acoustic Design

Inspiring new acoustic thinking, with special attention to immersive bass. The FIlO FD15 takes the lead by incorporating the F.T.B.S. 'Tesla Valve' bass enhancement acoustic design. Thanks to the high-precision powder metallurgy process used in creating the FD15, the length, angle, and quantity of channels within the earphone cavity are specially calculated to achieve a Tesla valve fluid structure that significantly enhances bass extension. Experience truly deep yet detailed bass.

Greatly Detailed for a Truly High-End Listening Experience, Frontal Acoustic Prism

Within the FD15 is a frontal acoustic prism, which not only retains the widely acclaimed ocals from the FD5 but also helps to adaptively adjust the all-new driver and enhances high-frequency diffusion. Specifically, engineers have added a specially designed acoustic filtering device at the front of the driver. When sound waves pass through, this acoustic device effectively addresses the subtle sound delay caused by different sound wave paths, achieving adaptive phase consistency and thus precise control over sound waves.

Specially Optimized, with an Emphasis on Vocals Conversation with an FD15

"The FD15, in my opinion, is one of FIlO's most balanced in-ear monitors, vocals-wise. But why do I say that? Because it produces a dense, perfectly lush vocal performance. It magnetically captures the voices of both mid-range and low-frequency singers, truly conveying the emotions within the voices without sacrificing resolution. With i ts large dynamic driver unit and structural design, the FD15 delivers deep and cohesive bass - making instruments like drum sound solid and powerful. While it may not be the last word in detail in ultra-high frequencies like the very best multi-driver balanced armature earphones, but in dynamic and complex musical passages the treble remains perfectly clear. The FD15 is also a good example of exhibiting the qualities expected from a magnesium-aluminum driver, with a large soundstage. In s ummary, if I had to choose one word to describe the FD15, it would "grand" : grand sense of solidness, grand dynamics, and a grand soundstage."

High-Level Comfort, Thanks to 6.7° Optimized for Comfort

All-around excellence, with professional attention paid to every aspect. Besides just achieving high-quality sound, we place great emphasis on long-term user comfort. We continuously improve and optimize the ergonomic design of our headphones to create an enjoyable and enduring high-end HiFi experience.

Carefully Adjusted Sound Nozzle

Based on user feedback and multiple optimized solutions, engineers have precisely adjusted theangle between the sound nozzle and the wearing surface long the Y-axis, raising it by 6.7° while maintaining the length of the nozzle. This allows the earphones to better fit into the ear canal, significantly enhancing both wearing comfort and stability.

Curved MMCX Connectors

The typical rigid right-angled cylindrical MMCX shape has been transformed into a more ergonomic curved shape that better accommodates a wider range of ear sizes. When worn around the ear, this design eliminates the discomfort caused by the earphone pressing against the back of the ear - another example or professional attention to details.

Optimized Frontal Contact Surface

Through precise measurements and optimization, with the FD15 we have narrowed the contact area between the front of the IEM and the ear. This ensures a better fit, reduces movement caused by caps and minimizes friction - resulting in even more comfortable wearing. Just one more example of our attention to even the smallest of details.

High-End Quality, Without the High-End Price 316L Stainless Steel Shell

Silver light flashes by, swift as a shooting star. The FIlO FD15 creatively combines a fresh design language with a closed-back acoustic design, utilizing carefully placed design surfaces flourishes to create an elegant and ever-changing play of light and shadow. To achieve this effect, the FD15 is made with 316L medical-grade stainless steel, which thanks to powder metallurgy sintering means the IEM is durable. It further undergoes meticulous hand-polishing and PVD electroplating for a premium finish, for a mirror-like visual sensation. Let its texture emotionally resonate with you.

Visibly Great, Audible Awesome

Cut through the markups and get access to affordable high-quality cables. Since being featured with the FT3, cables made from Furukawa' s high-purity monocrystalline copper have been sought after by audiophiles around the world. The new FD15 also uses these cables, and comes standard with a Furukawa monocrystalline copper + Furukawa monocrystalline silver-plated copper braided cable. The cable consists of four large strands, each made up of 100 copper wires and 20 silver-plated wires for an overall total of 480 wires, which is unparalleled in its class. With a cross-sectional area of 22AWG and having undergone 1050°C high-temperature smelting, the included cable is truly of high-end quality but at an affordable price.

Multiple Flavors, Choose to your Taste 2 Swappable Sound Nozzles

With the FD15, gain access to more sound profiles. The FD15 comes with two pairs of swappable sound nozzles, allowing you to customize the sound to your tastes and music preferences.

Specifications:

General Specifications:

• Model: FD15
• Type: 1 dynamic driver
• Balanced Armature: N/A
• Dynamic Driver: 13.8mm DLC + Magnesium aluminum alloy diaphragm
• Frequency Response: 10-40kHz
• Sensitivity: 112dB/mW (@1kHz)
• Impedance: 32Ω
• Plug: Interchangeable 3.5/4.4mm plug
• Cord Length: 1.2m
• Weight (per ear unit): About 12g
• Detachable Cable Design: Yes (Standard MMCX)