DUNU Falcon Ultra

Name: DUNU Falcon Ultra
Brand: DUNU

Two nozzles in the box, and reviewers who used different ones came away describing two different earphones.

The 2023 DUNU Falcon Ultra, a single 10.7 mm dynamic-driver IEM with a lithium-magnesium alloy dome and two screw-in tuning nozzles. It supersedes — and is not — the older, discontinued Falcon Pro, and it sits above the cheaper Titan S2 and Kima 2 in DUNU's single-DD line. Sold in two finishes that share the same driver and tuning: the original polished Klein Blue stainless steel at $239.99, and the later Meteorite Titanium edition at $219.

OverreviewIn-Ear Monitor13 sourcesas of 2026-08-20

The DUNU Falcon Ultra is a roughly $220 in-ear monitor built around a single 10.7 mm dynamic driver — DUNU's second-generation ECLIPSE design, with a lithium-magnesium alloy dome and a ring-type magnet assembly borrowed down from the far pricier Zen. It arrives in polished stainless steel, with a modular cable that ships with both 3.5 mm and 4.4 mm plugs, a large case, and a spread of ear tips generous enough that reviewers spend as much time on the box as on the sound.

It also ships with two screw-in nozzles — one steel, one gold-plated brass — and that detail turns out to explain a surprising amount of the argument about it. Measured on two independent rigs, the two nozzles are identical below about 2 kHz and roughly 2–3 dB apart from 4 to 10 kHz. Reviewers who fitted the steel one and reviewers who fitted the gold one were, in a real sense, not reviewing the same treble.

The overview

A single-dynamic-driver IEM at around $220, near-universally praised for build, cable and accessories, and for a low end whose control and texture almost nobody criticises. Sources agree the shells are comfortable and light for their metal construction, that the driver is easy to power but scales audibly with a cleaner source, and that the finish scratches and shows fingerprints. They divide on three things: how deep the bass really goes, whether the top end sparkles or bites, and whether the stage is ordinary or close to holographic. The first two splits track the nozzle fitted; the third tracks how much power the source is giving it.

Where they agree

Build, cable and accessory bundle are repeatedly called class-leading for the price
The low end is well controlled and textured — nobody accuses it of bloat or one-note bass
Small metal shells that wear light and suit small ears, despite ~10 g per side
Easy to drive from a phone, but audibly better on a cleaner, more powerful source
The polished finish scratches and shows fingerprints, and the connector is MMCX

Where they split

How deep the sub-bass reaches — impressive rumble to some, polite to most
Whether the treble sparkles cleanly or turns hot and tiring at volume
What the signature even is — warm and U-shaped, or neutral-to-V and not warm at all
Whether the stage is ordinary for the class or close to holographic

The verdict, mappedEvery aspect on one axis — criticized to praised. Hover a point for its spread; click to jump.

CriticizedNeutralPraised

By aspect — in detail

Bass

Contested · 8 src

Sources split on depth, not quality: everyone calls the low end controlled and well textured, but roughly two-thirds describe the sub-bass as polite rather than deep.

Measured

Both rigs put the bass shelf near +8 dB at 20–40 Hz relative to 500 Hz, with mid-bass (100–200 Hz) around +4.7 dB — a sub-bass-led shelf of moderate depth. The nozzles change it by only about 0.3–0.4 dB.

⚠ vs. listeners — Several reviewers describe the low end as mid-bass-focused, yet on both rigs sub-bass sits roughly 3 dB above mid-bass. The shelf is real but modest by current bass-forward standards, and it is set against an unusually strong 2–4 kHz lift — so the bass reads quieter next to the vocals than its absolute level suggests.

Where it splits

sub-bass digs deeper than expected31%

“Sub-bass is deeper than expected with very good rumbles.”
Suman Sourav Meher, The Headphone List

excellent quality, but modest sub-bass reach69%

“Sub-bass doesn’t kick very deep and has a moderately fast decay”
James, Headfonics

Treble

Contested · 8 src

The sharpest split, and a mechanical one: sources are near-evenly divided between a top end that sparkles cleanly and one that turns hot or tiring at volume.

Measured

The steel nozzle measures about 2 dB hotter at 4–5 kHz, 3 dB at 5–6 kHz and 3 dB at 8–10 kHz than the gold — a delta the two rigs reproduce to within 0.1 dB. Above 10 kHz both roll off, sitting 3–6 dB below the 500 Hz level.

⚠ vs. listeners — The disagreement tracks hardware rather than ears. A listener on the steel nozzle and a listener on the gold are hearing a genuinely different upper range, so both camps can be right at once — and one owner who finds the set fatiguing pins it to 4–5 kHz on the steel nozzle, exactly where the measured gap sits.

Where it splits

sparkles without turning harsh57%

“The areas that can cause harshness are carefully smoothed out, without compromising the intensity of vocals and high-pitched notes.”
James, Headfonics

energetic enough to bite or fatigue43%

“It’s not that the notes are not well rounded, it’s the extra bit of height and energy that can cause a little bit of discomfort.”
Suman Sourav Meher, The Headphone List

Tonality

Contested · 8 src

Well liked by nearly everyone, and described completely differently by them: warm and U-shaped to one half, neutral-to-V and not especially warm to the other.

Measured

Both rigs trace the same outline: a roughly +8 dB sub-bass shelf, +4.7 dB mid-bass, a dip through the lower mids, a large 2–4 kHz pinna gain (+9.4 dB on the steel nozzle, +7.7 dB on the gold) and roll-off above 10 kHz. How warm it reads depends almost entirely on the nozzle.

Where it splits· split roughly even

warm, U-shaped, bass-led

“The Falcon Ultra is the one that has the most focus on bass, specifically midbass, out of the models I have tried”
SenyorC, Acho Reviews

V-shaped or neutral-leaning, not really warm

“the upper mids are clearly elevated, which contributes to a laid-back, V-shaped impression that strengthens vocal clarity”
James, Headfonics

Soundstage

Contested · 8 src

Contested and source-dependent: about half call the stage ordinary for the class, half call it unusually big or near-holographic.

Where it splits

ordinary width for the price54%

“Soundstage is probably just north of average. It’s not huge but at no point does it feel congested or claustrophobic.”
SenyorC, Acho Reviews

big, immersive, close to holographic46%

“The depth thanks to the bass paired with the competent resolving ability makes the Falcon Ultra a very immersive and nearly holographic listening experience.”
kesobie, AudioNotions

Mids

Moderate · 7 src

Broadly the most-praised range — forward, clear vocals with natural note weight — with one long-term owner dissenting that they sit too far back.

“The midrange is where the Falcon Ultra flexes its muscles the most, showcasing a firm grasp on timbre and natural note weight.”
Prime Audio

“This IEM is simply lovely for the details seekers.”
Suman Sourav Meher, The Headphone List

“The mids are pushed back slightly”
hvalle, Head-Fi

Measured

The 2–4 kHz pinna gain measures +7.7 to +9.4 dB over 500 Hz depending on nozzle — a forward upper midrange on both rigs.

⚠ vs. listeners — The one reviewer who hears the midrange as recessed is describing it relative to the bass shelf; in absolute terms the graphs show a large upper-mid lift, not a dip.

Comfort

Moderate · 7 src

Small, light-wearing shells that most reviewers call outstanding — including for small ears — with one report of the fit refusing to sit stably across many tips.

“The shells feel extremely comfortable and secure in my ears.”
Prime Audio

“this is probably one of the most comfortable small IEMs I’ve ever worn”
kesobie, AudioNotions

“I did struggle a bit with the stability inside the ear, I can’t blame it on the tip because I did try a lot of tips”
Suman Sourav Meher, The Headphone List

Build

Strong consensus · 8 src

The strongest point of agreement: metal shells, cable and accessory bundle are called class leading, with the same two caveats everywhere — the finish scratches and marks, and it is MMCX.

“DUNU continues to be a class leader when it comes to build quality.”
Prime Audio

“they are both finger magnets and very very easily scratched”
SenyorC, Acho Reviews

“Build is very scratch and fingerprint-prone”
kesobie, AudioNotions

Detail

Moderate · 7 src

Resolves well for the money by common agreement, though sources range from calling it a class-leading detail set to calling its technical performance merely average.

“this is one of the most detailed IEM one can buy under $300”
Suman Sourav Meher, The Headphone List

“good detail retrieval and instrument separation but otherwise average technical performance”
Prime Audio

“It might not be the most detailed set I have ever heard yet it does a great job of making all the details available without pushing them at you with brute force.”
SenyorC, Acho Reviews

Imaging

Moderate · 6 src

Placement and separation are generally rated a strength, with a dissent that the warmth costs it some cleanliness between instruments.

“Imaging is superb with very good accuracy and precision.”
Suman Sourav Meher, The Headphone List

“Falcon Ultra maintains a high level of instrument separation while maintaining a natural roundness on instruments and vocals.”
Prime Audio

“Not the cleanest separation”
kesobie, AudioNotions

Dynamics

Moderate · 4 src

Punchy and quick in most hands, with one note that very dense, fast percussion can outrun it.

“It’s has very good dynamics and control, hitting upper bass notes cleanly is not an issue.”
Suman Sourav Meher, The Headphone List

“The driver’s super agile, breezing through those high-speed tracks like a champ.”
Prime Audio

“When more fast percussion instruments come into play, the Falcon Ultra may struggle slightly to keep up”
James, Headfonics

Isolation

Moderate · 3 src

Adequate rather than a strength — the vented shell trades some isolation for openness, though the metal housing still blocks a fair amount.

“The vented design of the Falcon Ultra enables a more natural and spacious sound presentation, albeit at the expense of slightly reduced isolation.”
James, Headfonics

“Passive noise isolation is good too, as the stainless steel housings block out a good amount of external noise.”
Prime Audio

Value

Moderate · 6 src

Widely called strong value for what is in the box, with a dissent that at full price the field has moved on since 2023.

“It is an IEM that performs very well at a very reasonable price.”
SenyorC, Acho Reviews

“what it brings to the table as a whole is a lot more than what the asking price suggests”
Suman Sourav Meher, The Headphone List

“In conclusion, the DUNU Falcon Ultra is an excellent IEM for the money.”
Prime Audio

Best for

Listeners who want one box with everything — modular cable, tips, case — and no further shopping
People who value bass quality and control over sheer sub-bass quantity
Small ears, and anyone who finds larger resin shells unstable
Anyone happy to swap nozzles to tune the top end to their own sensitivity

Skip if

You want a big sub-bass shelf — the measured shelf is real but moderate
You are treble-sensitive and unwilling to fit the gold nozzle
Raw stage width is your priority; separation is the stronger suit here
You dislike MMCX, or want a finish that shrugs off pocket time

At a glance

↳Consensus

83 / 100weighted mean across 13 sources — an aggregate, not a single verdict

↳Type

IEM

↳Sources

13 · 6 classes

↳As of

2026-08-20

↳Owner rating

4.5/5 · 20small, self-selected sample — skews high

Where to buy

DUNU Falcon UltraAmazon

Sources13 reviews across 6 classes. Weight reflects expertise × independence; echoes collapsed.

s1DUNU Falcon Ultra ReviewHeadfonicsEditorial2023-08-14w0.95
s2DUNU Falcon Ultra Review — Synergy, comparisons and verdictHeadfonicsEditorial2023-08-14w0.95
s3DUNU Falcon Ultra Review : Ruling its ClassThe Headphone ListEditorialaffiliate2024-05-23w0.80
s4Review - Dunu Falcon UltraAcho ReviewsEditorial2024-01-28w0.95
s5DUNU Falcon Ultra ReviewPrime AudioEditorialaffiliate2023-12-24w0.80
s6DUNU Falcon Ultra Meteorite Titanium Review: 22 Years of GoodnessAudioNotionsVideo2024-05-18w0.85
s7Frequency response measurements — Falcon Ultra, blue and gold nozzlesAcho Reviews squiglinkMeasurementw1.00
s8Frequency response measurements — Falcon Ultra Blue and Goldcqtek squiglinkMeasurementw1.00
s9DUNU Falcon Ultra — Reddit review aggregateRedditRecsCommunityaffiliate2026-08-20w0.75
s10DUNU Falcon Ultra — owner reviews and rating aggregateHead-FiOwnerunknownw0.70
s11Dunu Falcon Ultra - the best bass on IEMhvalle, Head-FiCritical2026-04-24w0.60
s12DUNU Falcon Ultra: A magical Bird of Prey!Jamsblast, Head-FiOwner2025-03-30w0.55
s13Dunu Falcon Ultra Titanium review and comparisonsmars chan, Head-FiOwner2024-04-29w0.55

Limitations & method

A read of where the reviews land as of August 2026 — the sub-$300 single-driver field moves fast, and several rivals here have been replaced since.
Most of the published reviews date from the 2023–24 launch window, when the set was new and priced higher than it often sells for now.
Owner star ratings skew positive, since they mostly come from people who chose to buy it.
Which nozzle a reviewer fitted changes the top end by two to three decibels, and not everyone says which one they used — so some of the disagreement above is really a hardware difference.
Bass and stage impressions shift with tips, seal and how much power the source gives it; a phone and a desktop source do not present this earphone the same way.
The two finishes, Klein Blue and Meteorite Titanium, share a driver and tuning but not a price, so reviews of one are read here as applying to both.

Consensus-of-sources synthesis · as of 2026-08-20 · not a measurement verdict or ground truth.