FiiO FT5 Open-Back Planar Magnetic Headphones
The FT5 brings open-back planar sound into a headphone that is easier to drive and easier to enjoy.
When Detail Alone Is Not Enough
Planar headphones are often chosen for speed, scale, and low distortion, but some can feel demanding to power or too analytical for long listening. That can turn a technically impressive headphone into something that gets admired more than played.
The FiiO FT5 takes a more musical route. It uses a large 90 mm planar magnetic driver, open-back construction, and a carefully designed cable and accessory package to create a headphone that feels spacious, detailed, and inviting without needing an intimidating amplifier setup.
Why We Chose the FT5
We chose the FiiO FT5 because it makes planar magnetic listening more accessible without making it feel stripped down. The 36 ohm impedance and 96 dB per mW sensitivity help it work with capable portable sources, while the 90 mm planar driver gives it the scale and speed that make this category so appealing.
It also arrives as a complete listening package. The included 4.4 mm balanced cable, 3.5 mm plug, 6.35 mm adapter, XLR-4 balanced adapter, protein leather pads, suede pads, and storage case make it easier to match the headphone to different sources and listening preferences.
What the Specs Won't Tell You
Planar Speed With a Warmer Musical Shape
The FT5 gives music the fast response and separation people expect from a planar headphone, but it does not feel like a cold detail machine. Notes have body, bass has texture, and long sessions feel easier to stay with.
Big Headphone Sound Without a Difficult Setup
The high sensitivity and moderate impedance make the FT5 friendlier to portable DACs, DAPs, and compact desktop setups than many planar designs. It still rewards a better source, but it does not demand a large system before it starts to make sense.
A Complete Kit for Source Matching
The cable and adapter package lets the FT5 move between balanced portable players, desktop headphone amps, and standard headphone outputs. That makes it easier to experiment with sources and hear how the headphone changes as the rest of the chain improves.
Expert Consensus
The Headphoneer described the FT5 as musical rather than strictly neutral, praising its warmth, clarity, and inviting presentation.
Headfonia noted that the FT5's low impedance makes it easier to drive than many high-performance headphones.
The Audio Two Verdict
The FT5 is a strong step when open-back listening, comfort, and musical flow matter more than chasing a perfectly flat graph. It pairs well with FiiO's better dongle DACs and portable players, especially the KA17, M21, and M33 R2R. The appeal is simple: it gives you the scale and speed of planar headphones in a package that feels approachable and well thought out.
The Industry Take: "Musical, not neutral." — The Headphoneer
Tech You Can Hear
| What You Hear | Why It Happens |
|---|---|
| Fast, open sound with better separation between layers | Large 90 mm planar magnetic driver |
| Cleaner transient response and lower driver blur | Approximately 6 μm ultra-thin diaphragm |
| More authority without needing a huge amplifier | 36 ohm impedance and 96 dB per mW sensitivity |
| A wider sense of space around instruments | Open-back acoustic structure |
| The headphone changes naturally with source upgrades | Included balanced and single-ended connection options |
Technical Highlights
- 90 mm open-back planar magnetic headphone
- Approximately 6 μm ultra-thin diaphragm
- N52 neodymium magnet system with up to 1.5T magnetic density
- 36 ohm impedance and 96 dB per mW sensitivity
- Frequency response: 7 Hz to 40 kHz
- High-purity silver-plated monocrystalline copper cable
- Protein leather and suede ear pads included
Why Choose Audio Two
Audio Two ships across Canada. If you don't have access to a proper high-end dealer in your city, this is your way in — real expertise from people who've heard the system, matched the electronics, and can guide you through a decision this size.