FiiO FT5 90mm Open Back Planar Magnetic Headphones


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A sonic revolution in headphone technology

Welcome to the FiiO FT5 90mm Open Back Planar Magnetic Headphones, a breakthrough in personal audio that combines cutting-edge technology with unparalleled comfort. FiiO's first set of planar magnetic headphones, they feature large 90mm drivers, a feather-like 6um ultra-thin diaphragm, and high-end micron-plated aluminum-silver alloy coils. 

Ride the lightning: Planar magnetic drivers

Planar magnetic technology brings together the best of dynamic and electrostatic headphones, offering rich detail and incredible power. The FT5 leverages a large 90mm planar magnetic driver, utilizing 20 neodymium magnets per driver to give your audio a life-like quality rarely found in headphones.

Whisper-thin yet durable: 6um ultra-thin diaphragm

Balancing sound quality and reliability can be a tricky feat. But FiiO nailed it with a 6um ultra-thin diaphragm that is both resilient and capable of producing high fidelity sound. Tested extensively to find the ideal thickness and material, this diaphragm proves that bigger isn't always better.

Micron-plated aluminum-silver alloy coils

The FT5's design emphasizes meticulous attention to detail, particularly in its coil construction. FiiO’s selection process for materials involved comprehensive testing, leading to the choice of a lightweight aluminum alloy intermingled with silver. This composition was chosen for its ability to improve conductivity. Such precise material engineering aims to deliver an auditory experience that not only satisfies but surpasses the standards of audio enthusiasts.

Magnet harmony: 20 neodymium magnets per driver

By carefully balancing 11 magnets inside and 9 outside the driver, the FT5 achieves a harmonious magnetic field. This optimized setup leads to a consistent driver movement and significantly reduced distortion, offering you a higher fidelity sound experience.

Power without the bulk: High sensitivity and easy to drive

Gone are the days of lugging around bulky equipment just to get the most out of your headphones. With a high sensitivity of 110dB/1 Vrms@1kHz, the FT5 can be powered effortlessly by portable players. Now you can take that concert hall quality sound with you, wherever you go.

Supreme comfort: Lightweight magnesium aluminum alloy construction

The FT5’s body is made of a lightweight magnesium aluminum alloy, giving you the comfort needed for extended listening sessions. The material is 64% as dense as traditional aluminum alloy, ensuring that the headphones stay comfortable, even during long listening stretches.

Wide-open spaces: Open-backed design

If you're looking for headphones that provide a vast soundstage and treble resolution, the open-back design of the FT5 has you covered. The carefully engineered structure ensures that you’re immersed in your music.

Interchangeability at its finest: 4 types of audio plugs

Offering a versatile array of audio plugs, including 3.5mm/4.4mm interchangeable plugs and 3.5mm to 6.35mm and 4.4mm to XLR-4 balanced adapters, the FT5 is ready to connect with your existing setup without any additional hassle.

2 types of earpads

Choose between suede and protein leather earpads for a tailored listening experience. Whether you're looking for a balanced sound or a wider soundstage, the FT5 offers you the luxury of choice.

Product highlights

  • Large 90mm planar magnetic driver
  • 6um ultra-thin diaphragm
  • Micron-plated aluminum-silver alloy coils
  • 20 neodymium magnets per driver
  • High sensitivity and easy to power
  • Lightweight magnesium aluminum alloy construction
  • Open-backed design
  • 4 types of audio plugs
  • 2 types of earpads


  • Headphone type: Open planar magnetic headphones
  • Frequency response: 7Hz-40kHz
  • Driver type: 90mm planar magnetic
  • Driver material: PAR diaphragm + aluminum alloy coils
  • Impedance: 36Ω
  • Sensitivity: 
    • 110dB/rms (@1kHz)
    • 96dB/mW (@1kHz)
  • Max power input: 2000mW
  • Weight: About 456g (excluding cable)
  • Earpad pressure: 4.0N±0.3N
  • Cable length: About 1.5m
  • Cable material: 392 wires of high-purity silver-plated monocrystalline copper
  • Cable connector: Dual 3.5mm plugs on headphone end, with swappable audio plugs

What’s included

  • 3.5mm interchangeable plug*1
  • 4.4mm interchangeable plug*1 (pre-installed at factory)
  • 6.35mm male to 3.5mm female adapter*1
  • XLR-4 male to 4.4mm female balanced adapter* 1
  • Leather storage case*1
  • Velvet bag*1
  • Protein leather earpads*1 pair
  • Suede earpads*1 pair (pre-installed at factory)
  • Headphone cable* 1
  • User manual*1

Apos Promise

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