Dynamic IEMs 

13.8mm large dynamic driver | Magnalium diaphragm DLC gasket driver W-shaped gasket | 1.5T magnetic flux | Frontal acoustic prism “Tesla Valve” bass  enhancement  acoustic  design  |  316L  stainless  steel shell Furukawa monocrystalline silver + Furukawa monocrystalline silver-plated copper braided headphone cable | Two colors available | Hi-Res Audio Certified

Other diaphragms

A different kind of “big”

40%

Effective diaphragm area increased by

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.

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.

13.8mm large dynamic driver

Within the FD15 is a frontal acoustic prism, which not only retains the widely  acclaimed vocals 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.

Greatly detailed for a truly high-end listening experience, frontal acoustic prism

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:

High-level comfort,

thanks to 6.7° Optimized for comfort

Specially optimized,with an emphasis on vocals Conversation with an FD15 engineer

“The FD15, in my opinion, is one of FIIO’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  be “grand”: grand sense of solidness, grand dynamics, and a grand soundstage.”

“Robust materials” for a robust sound

Magnalium diaphragm DLC gasket driver

With the FD15, we are sincerely bringing you into a new realm of sound. The all-new FIIO FD15, as the successor to the FIIO FD5,introduces a truly high-end driver design——a 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.

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.

Reinventing sound with FD15

A “sound” entry into excellence

Reliable enough

“Tesla Valve”  bass enhancement acoustic design

Inspiring new acoustic thinking, with special attention to  immersive bass. The FIIO 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.

Parts list

①---------------------------------------------Earphones*1

②--------------------------------------- Earphone cable*1

③------Balanced eartips S/M/L*3 pairs (M pre-installed)

④-----------------------------Vocal eartips S/M/L*3 pairs

⑤- -----------------------------Bass eartips S/M/L*3 pairs

⑥ --------------------------------- Foam earips M*2 pairs

⑦-----------------------------HS18 eartips S/M/L*3 pairs

⑧ -----------------------------------Storage case HB11*1

⑨---------------------------- MMCX quick release tool*1

⑩ -------------------------------------- Cleaning brush*1

⑪------------------------ 3.5/4.4mm swappable plugs*1

⑫----------Red/Black swappable sound nozzles*2 pairs

⑬------------------------------------ Quick start guide*1

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.

The FD15 is available in obsidian black and racing silver, two stylish colors for  you to choose from. Obsidian black: Subtle yet elegant, a true stable classic Racing silver: Always moving like quicksilver, with thunderous momentum

Looks can be important Two colors available

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.

Multiple flavors, choose to your taste 2 swappable sound nozzles

Basic specifications

Earphone type:  Dynamic in-ear monitors

Wearing style:  in-ear and around-the-ear

Driver:  aluminum-magnesium dynamic driver

Frequency response:  10Hz-40kHz

Impedance:  32Ω@1kHz

Sensitivity:  112dB/mW@1kHz

Cable:  4 strands totaling 480 wires of Furukawa monocrystalline copper + Furukawa monocrystalline silver-plated copper braided headphone cable

Cable length:  about 1.2m

Single unit weight:  about 12g (excluding cable)

Earphone connector:  expanded MMCX

Audio plug:  straight twist-lock swappable plug
Two colors available:Obsidian Black/Racing Sliver