FiiO - FD1 Single Dynamic In-Ear Monitors

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Product Details from the Brand

FD1 Beryllium-Plated Single Dynamic IEM

Beryllium-plated dynamic driver | N50 two-way magnetic circuit
Balanced pressure relief technology | Celluloid faceplate
4-stranded high-purity monocrystalline copper cable | Strong bass

Flagship-grade beryllium- plated diaphragm driver

With Fiio's typical flagship-grade headphone technology, the FD1 dynamic driver is made of high-end beryllium, known for being light, thin yet extremely rigid. It brings you a sense of movement and power, shaping majestic sound performances.

4 times more rigid than steel
3/4  lighter than titanium
12km/s sound velocity

Two-way magnetic circuit design

Powerful driven capacity The dynamic driver is designed with an N50 two-way magnetic circuit having a 55% magnetic flux promotion and nearly 1 Tesla of magnetic field intensity compared with the traditional single magnetic circuit. The double magnetic flux activates forceful driven capacities that enable energetic, robust bass performances and even full and delightful transient responses.

Patented balanced pressure relief technology

The beryllium diaphragm coupled with the two-way magnetic circuit design allows improved bass acoustic pressure and deeper bass explosion. Plus FiiO patented balanced pressure relief technology, the pressure is able to stay in a balanced state after precise counting and adjusting. All of these features ensure non-distortion for large dynamics, natural and elastic bass. You can comfortably enjoy hi-res music for a really long time with no burdens.

Gold-plated retaining ring stable vocalization unit

The FD1 is meticulously designed with a gold-plated aluminium alloy retaining ring and sound tube for each unit, beautifying the FD1 and simultaneously providing way stable cavity for the audible unit, achieving incredible sound quality.

Great sound, just want to listen as much as possible

The loose and atmospheric bass, clearly transparent mids and high-resolution treble, are specially tuned with relatively balanced distributions. The overall tuning is a more popular style. Easy to drive and compatible with ranges of devices, the FD1 fully shows up the charm of music with details.

32Ω Impedance
109 dB Sensitivity

Real gorgeous goodness
Unique celluloid faceplate

The faceplate is inlaid with rich-layer celluloid materials specially chosen for its unique texture and style, each of which contributes to the glossy FD1. Alongside with the low-key golden FiiO logo, the whole FD1 is coming with glittering and translucent light.

4-stranded high-purity monocrystalline copper cable

Included with the FD1 is the cable made of braided Litz wires, 30 cores per strand, 4 strands in a total of 120 cores. Each Litz a wire is insulated from each other, ensuring better audio transmission performance under the naturally-occurring yet adverse "skin" and "proximity" effects. What this means for actual listening is improved bass, hauntingly realistic vocals, as well as obviously promoted sound quality.

Lighter to release burdens from your ears

The ergonomic design, combined with lightweight elements finally achieves comfortable-wearing feelings. With each unit weighing in at a mere 4.5g, it is put on your ears like it is nothing there.

Considerate in every tiny detail

01 Aluminium alloy sound tube
02 0.78mm 2-pin connectors
03 Gold-plated 3.5mm plug
04 Left blue and right red unit markers
05 Technical metal splitter

Abundant accessories

Balanced eartips (large*2, medium*2, small*2)
Bass eartips flarge*2, medium*2, small*2)
Memory foam eartips* 2
HB1 carrying case*1


  • Frequency Response 10Hz~40kHz
  • Driver Type Beryllium-plated diaphragm
  • Impedance 32Ω@1kHz
  • Sensitivity 109dB@1mW
  • Input Power 100mW
  • Connector 0.78mm 2-pin
  • Cord Length About 120cm
  • Weight 4.5g (single unit)

Product Reviews

FiiO - FD1 Single Dynamic In-Ear Monitors

Customer Reviews
4.0 Based on 1 Reviews
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Jeremy C.
United States United States
Well Worth the Buy

I got the FD1 to replace the v-moda remix earbuds I had been using for the past 10 years. They work well on a laptop and even better on an AK Jr. They even work well plugged into the entertainment system on a airplane. The earbuds feel really light in the ear, and at higher volumes the noise isolation is sufficient even on an airplane. The first unit I received was defective (the right earbud was not working). The replacement came sometime later. Kudos to audio46 for their customer service.


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