FD15
Single Dynamic Driver In-Ear Headphones
with Detachable Cable and 3.5mm/4.4mm Terminations

The FiiO FD15 in-ear monitors deliver impressive sound, appealing build quality, and comprehensive accessories at its accessible price point.
It introduces a new magnalium diaphragm DLC (diamond-like carbon) gasket driver. By combining these two materials, not only does the FD15 deliver a spacious and relaxed natural sound, but it does so while transparently reproducing musical detail.
Purchases from Bay Bloor Radio include a 1-Year Warranty from FiiO Canada, with local repair/replacement without the need for international shipping.
13.8mm dynamic driver
The FD15 explores higher levels of audio performance by increasing the diameter of the dynamic driver compared to its predecessor. 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 conversation 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.
Magnalium diaphragm DLC gasket
The FD15's new dynamic driver features material innovation:
- Magnalium diaphragm – a scientifically calculated blend of magnesium and aluminium that features high hardness and low distortion when moved for a 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.
W-shaped gasket
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.
Φ8.6mm long voice coil
The voice coil diameter of the FD15 has been increased to Φ8.6mm. 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.
Tesla Valve for bass
FD15 incorporates the a "Tesla Valve" patented bass enhancement system. 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 fluid structure that significantly enhances bass extension. Experience truly deep yet detailed bass.
Swappable nozzles
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.
- Red nozzle - enhances bass, gives lusher vocals, and overall a more emotional experience.
- Black nozzle - enhances high frequencies, making it easier to pick out details, for genuinely clear treble.
Stainless steel shell
FD15 creatively combines a fresh design language with a closed-back acoustic design, utilizing carefully placed design surface 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, with a mirror-like visual effect.
Comfortable design
FD15 features a carefully angled nozzle, curved MMCX connectors, and a carefully-sculpted shell designed to minimize contact with the skin. This ergonomic attention to detail makes the IEMs more comfortable to wear over time.
Comprehensive tips
FD15 includes an incredible 13 pairs of ear tips, each different in size and material to allow you to find your favourite. The translucent black silicone tips are balanced in their sound, the red and black silicone tips emphasize the bass, the red and white silicone tips puts additional focus on vocals, while the foam tips maximize isolation. These four types of ear tips each come in Small, Medium, and Large sizes.
Next-level cable
Cables made from Furukawa’s high-purity monocrystalline copper have been sought after by audiophiles around the world. The new FD15 uses the LC-RC 2024 cable, with four large strands, each made up of 100 copper wires and 20 silver-plated wires for an overall total of 480 wires — unparalleled in its class. With a cross-sectional area of 22AWG and having undergone 1080° high-temperature smelting, the included cable is truly of high-end quality but at an affordable price. In addition, the cable features left blue and right red markings for convenience as well as unique interchangeable audio plugs, allowing you to freely switch between 3.5/4.4mm plugs depending on your music source.
What’s included
- FiiO FD15 In-Ear Headphones
- LC-RC 2024 Cable with 3.5mm and 4.4mm interchangeable terminations
- Balanced ear tips (S/M/L pairs)
- Bass ear tips (S/M/L pairs)
- Vocal ear tips (S/M/L pairs)
- Foam ear tips (2 pairs)
- HS18 ear tips (3 pairs)
- Storage case
- Cleaning brush
- MMCX quick release tool
- User manual
- Interchangeable sound nozzles (2 pairs)
- Quick Start Guide
- 1-Year Warranty, administered by FiiO Canada and Bay Bloor Radio (no international shipping required)
Specifications
Driver Type
13.8mm dynamic
Impedance
32ohm @ 1kHz
Sensitivity
112dB/mW (@1kHz)
Frequency Response
10Hz ~ 40kHz
Cable Length
approx. 120cm
For hygienic reasons, there are no returns on earphones once opened.
All our earphones are available for personal demonstration in-store. We encourage you to try before buying to ensure satisfactory sound, fit, and functionality.
If an item is defective upon receipt, please notify us within 30 days of purchase so we can arrange an exchange. For issues following 30 days, we will work with you and the manufacturer within the scope of each brand’s warranty and service policies.