HeadphoneOverreview

FiiO FT3

Name: FiiO FT3
Brand: FiiO

Open-back sub-bass no HD 600 can reach — and a top end that one camp calls smooth and another calls a reason to EQ.

36 sourcesUpdated 2026-10-17

$220Typical US price

Score aggregates reviewer opinions across topics.

The short version

What to know.

An open-back over-ear built on a 60 mm dynamic driver at 350 Ω, launched at $299 and last sold around $220. Sources agree on the fundamentals: an aluminum build and accessory kit well above the price, a linear midrange, and sub-bass extension that five measurement rigs put 11–14 dB above an HD 600 at 20 Hz. They also agree it leaks freely, that the 3 m cable is too long for a desk, and that it is best paired with a capable amplifier. Beyond that the record splits. Treble is a three-way argument — smooth, bright-but-fine, or hot enough to fatigue — and the rigs show why: the FT3 matches an HD 600 at the ear-gain peak but runs 3–8 dB hotter between 7 and 10 kHz, while sitting close to the Harman target. Tonality divides into a warm-neutral, Harman-shaped camp and a cool, analytical one; soundstage into wide versus compact; detail into resolving versus average. Pads move it measurably (suede adds bass and lower-treble lift; protein leather is flatter and leaner), and the small, round pad openings are the most common comfort complaint.

About this product

The 350 Ω version — a 60 mm dynamic driver with a beryllium-plated gasket and DLC diaphragm in an aluminum-alloy open-back frame (105 dB/V, ~391 g), shipped with suede and protein-leather pads, a 3 m Furukawa cable with swappable 3.5 / 4.4 mm plugs plus 6.35 mm and XLR-4 adapters. FiiO also sells a same-priced 32 Ω FT3 that is a different headphone: an aluminum-composite diaphragm instead of beryllium, hybrid pads in place of the protein-leather set, a 1.5 m cable and 110 dB/V, and reviewers who have heard both describe it as warmer and more V-shaped. Both come in black or white. Not the planar FT5 or FT1 Pro, the closed wood-cup FT1, or the later FT7 / FT13.

The FT3 was FiiO's first real over-ear headphone, launched in spring 2023 at $299 after fifteen years of the company being known for players, amplifiers and IEMs. It is built around an unusually large 60 mm dynamic driver, angled toward the ear and wound to 350 Ω, in an all-aluminum open-back frame with a self-adjusting suspension strap. The box holds two pad sets that measurably change the tuning, a 3 m Furukawa cable with swappable plugs for every common output, and a hard leather case.

It arrived in the bracket long owned by Sennheiser, Beyerdynamic and HIFIMAN, and the reception was warm but never quite unanimous. The build, the accessory haul and a bass extension no open-back at the price had been managing are close to settled. The arguments are about the top end, about whether its presentation is warm and Harman-like or cool and analytical, about how big it sounds — and about pads whose 55–60 mm openings some ears simply don't fit. By late 2026 it had largely sold through at US dealers.

A good fit for

Listeners who want real sub-bass from an open-back without giving up a linear midrange
HD 600/650 owners who want the same broad neutrality with bass extension underneath it
People who value build and accessories — metal frame, hard case and every plug in the box
Tube-amp and high-output-impedance users: at 350 Ω the tonal balance barely moves with source impedance
Pad-rollers, since the two supplied sets land in measurably different places

Think twice if

You are treble-sensitive and won't EQ — a real share of listeners find the 7–10 kHz region tiring over long sessions
You have large ears or wear thick-framed glasses — the round ~55 mm pad openings turn it semi-on-ear for many
You want a warm, lush, full-bodied presentation; a sizeable camp hears it as cool and analytical
You need isolation, or want to listen anywhere near other people
You only have a phone or a weak dongle and won't add an amp
You want the warmer, bassier, easier-to-drive tuning — that's the 32 Ω FT3, a different headphone at the same price

The reviewer consensus

Agreement &
disagreement.

5 / 12topics divide opinion

1 Strong agreement6 Mostly agree5 Divided opinions

Common ground8

Sub-bass extension that is genuinely unusual for an open-back — 11–14 dB above an HD 600 at 20 Hz on five measurement rigs, and it takes a large EQ bass boost without strain.
An all-aluminum build and accessory kit well above the price: hard leather case, two pad sets, and 3.5 / 4.4 mm plugs with 6.35 mm and XLR-4 adapters on one modular cable.
A linear, clean midrange — the part of the tuning that changes least when you swap pads.
The pads are a real tuning control: suede adds bass and some lower-treble lift; protein leather is flatter and leaner.
Excellent channel matching, confirmed on retail units by more than one bench.
Open-back with essentially no isolation and heavy leakage both ways — a quiet-room headphone only.
The 3 m cable is too long and tangle-prone for desk use; nearly every source that mentions it says so.
Best with a capable amplifier, and unusually tolerant of tube and other high-output-impedance sources.

Points of contention7

Treble: smooth and refined vs a little bright but fine vs peaky and fatiguing — and it measures near the Harman target while running hotter than an HD 600 above 7 kHz.
Tonality: warm-neutral and Harman-shaped vs cool, analytical and sterile.
Soundstage: wide and spacious vs compact, linear and short on depth.
Detail: resolving for the price vs merely average, with some of the clarity coming from treble lift.
Dynamics: lively and punchy vs polite and short on slam.
Comfort: easy all-day wear vs pads too small and shallow to fit larger ears or seal properly.
Drive requirement: 'needs a serious amp' vs 'fine off a decent portable source'.

A closer listen.

12 topics · 5 divided

Left: criticalRight: positiveTighter lines: more agreement

Choose a topic

Treble

Leans positiveDivided opinions

Reviewer sentiment21 supporting sources

CriticalNeutralPositive

Band: opinion spread · Dot: weighted average

Sources split three ways. The largest group hears a smooth, refined top end; a second hears it as a little bright but never piercing; a third — including the one pinna-less bench and several owners who reached for EQ — finds it peaky and fatiguing over time. The measurements explain the spread: close to the Harman target, but clearly hotter than an HD 600 above 7 kHz, so how it lands depends on what you compare it with and how loud you listen.

Measured

Against Harman OE 2018, oratory1990's GRAS data keeps the treble within about ±3 dB with either pad (suede +2.9 dB at 5 kHz and +3.1 dB at 12 kHz). Against an HD 600/6XX measured on the same rig, five pinna rigs agree the FT3 matches it at the 3 kHz ear-gain peak but runs roughly 3–8 dB hotter between 7 and 10 kHz. DIY-Audio-Heaven's unsmoothed flatbed reads peaks near 5 kHz and 9–10 kHz around a 7 kHz null plus a short-lived 10 kHz CSD resonance; Kuulokenurkka says the tall 11 kHz peak on its own rig is mostly a fixture resonance and puts the real one near 2 dB.

vs. listeners — The bench that reads the treble hottest has no artificial pinna, and its owner says so: the 7 kHz null 'may not be as ‘bad’ as the measurements show because the pinna would ‘lower’ the effect.' The pinna rigs agree the energy above 7 kHz is real but modest by the Harman yardstick — which is why the same top end reads as 'smooth' to listeners coming from Harman-tuned gear and 'bright' or 'sharp' to those coming from an HD 600.

Where it splits

Smooth and refined — an even top end that belongs on a more expensive headphone.46%

“The smooth treble reproduction also feels like it belongs to a much more expensive set of headphones too”
TechPowerUp (VSG)

A little bright and energetic, but not harsh or fatiguing.32%

“The treble is crisp and energetic with plenty of micro detail retrieval on tap and while it is a little bright and not that forgiving, you wouldn’t call it piercing or fatiguing.”
Ichos Reviews (Petros Laskis)

Elevated and peaky — impressive at first, then sharp and fatiguing.22%

“Treble is elevated and ‘sharp’ sounding and not very refined, a bit grainy.”
DIY-Audio-Heaven (Solderdude)

Link to this topic

The hardware

Specifications.

Checked 2026-10-17

Design

Type: Open-back over-ear
Drivers: 1 × 60 mm dynamic (Beryllium-plated gasket + DLC diaphragm)
Tuning: Pads · 2 options
Housing: aluminum alloy construction, lightweight hollow design

Electrical

Impedance: 350 Ω
Sensitivity: 105 dB/V≈ 100.4 dB/mW
Frequency response: 7 Hz – 40 kHz

Connection

Cable: Detachable, dual-entry, 3 mcommunity-sourced: detachable cable
Connector: 3.5 mm
Plugs supplied: 3.5 mm, 4.4 mm balanced, 6.35 mm, 4-pin XLRmodular

Physical

Weight: 391 g

Manufacturer-published figures, not measurements · from fiio.com. Detachable cable not published by the maker — community-sourced from hands-on reviews: diyaudioheaven.wordpress.com, ichos-reviews.com, headphonecheck.com.

Follow the evidence

Sources 36

Read with context

Limitations & method.

As of 2026-10-17

What to keep in mind 7

A read of where the reviews land as of October 2026 — the FT3 launched in spring 2023, and FiiO has since filled the shelf around it with the FT1, FT1 Pro, FT5, FT7 and FT13.
Most reviews were written at the $299 launch price; it later sold for about $150–220, and by late 2026 US dealers list it as sold out or discontinued, so a used or grey-market unit may be the realistic route.
The two supplied pad sets change the sound — suede adds bass and a little treble lift, protein leather is flatter and leaner — so two honest reviews can be describing different-sounding headphones.
Fit matters more than usual: the round pad openings are small, and a pad that doesn't seal fully can cost a lot of the measured sub-bass. Your ears and glasses may decide how this sounds as much as the driver does.
Treble impressions depend on what you're used to: it sits close to the Harman target but is noticeably livelier above 7 kHz than an HD 600.
There is a second, same-priced FiiO FT3 at 32 Ω with a different driver and pads; impressions of one don't transfer to the other.
The owner star rating comes from a small Japanese set of eight; the US retailer and forum ratings are smaller still, and all skew toward people happy enough to keep it.