In-Ear MonitorOverreview

DUNU SA6 MK2

An all-BA set that pulls the upper mids back on purpose — and three years on, the room is still split almost exactly in half on whether that reads as natural or as absent.

49 sourcesUpdated
$580Typical US price

Score aggregates reviewer opinions across topics.

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DUNU SA6 MK2

The short version

What to know.

A $580 six-balanced-armature in-ear with a bass switch, and the third revision of a set that made its name by deliberately under-shooting the usual upper-midrange lift. Sources agree closely on the physical product: a generous kit built around a modular cable sold separately for around $200, a semi-custom resin shell most find comfortable and well isolating, a wide stage, and smooth, non-fatiguing treble with far more top-octave air than the original SA6. Twenty-eight measurement rigs agree on the shape — bass roughly at the Harman shelf, an ear-gain peak that arrives early (around 2.7 kHz) and only about +5 dB tall, presence and lower treble 5–7 dB under the target, and a big lift above 12 kHz. What that shape adds up to is the dispute: reviewers split almost evenly between a refreshing, natural alternative to Harman and a warm tilt that trades clarity and vocal presence for euphony, and the same near-even split runs through bass impact and value. Most still hear the midrange itself as smooth rather than recessed, with female vocals the flashpoint.

About this product

The 2023 third pass at DUNU's Studio SA6 — not the 2020 original SA6, and not the limited-run SA6 Ultra whose voicing it partly inherits. Six balanced armatures per side (two Sonion AcuPass vented woofers, two Knowles mids, two Knowles tweeters) on a three-way crossover, plus an 'Atmospheric Immersion' bass switch. Sold as both SA6 MK2 and SA6 MKII.

DUNU's original SA6 became a mid-fi fixture in 2020 by ignoring the house style of the moment: where nearly everything at the price chased Harman's big upper-midrange lift, the SA6 eased off it, and a lot of listeners who found that region shouty finally exhaled. The SA6 MK2 is the third pass at that idea, folding in the limited SA6 Ultra's extra treble air and adding a bass switch, still on six balanced armatures and still around $580.

It is also the set where DUNU's own trick starts to divide people. The ear gain sits lower and earlier than on either predecessor, the top octave climbs higher, and the same measured shape reads to one camp as unusually natural and fatigue-free and to another as a warm, euphonic tilt that leaves vocals behind. Both camps are looking at the same graph.

A good fit for

  • Listeners who find Harman-style upper mids shouty and want that region eased back
  • Long sessions — non-fatiguing treble and a comfortable semi-custom fit
  • Anyone who wants a wide, open stage from a mid-fi set
  • Buyers who value what is in the box as much as what comes out of it
  • Rock, acoustic and male-vocal material, where the warmer tilt suits

Think twice if

  • You want forward, spotlit female vocals
  • You want dynamic-driver rumble and physical slam
  • You are prone to canal pressure, or have small ears
  • You already own an original SA6 or SA6 Ultra and hope for an outright upgrade
  • You are shopping strictly on price-performance — reviewers name several cheaper sets they prefer

The reviewer consensus

Agreement &
disagreement.

4 / 12topics divide opinion
soundstageisolationbuildbasstrebleimagingdetailcomforttonalitymidsdynamicsvalue
3 Strong agreement5 Mostly agree4 Divided opinions

Common ground6

  • The in-box kit is exceptional for the money — a modular cable sold separately for around $200, four tip types and a proper case
  • The stage is unusually wide for an in-ear; depth is the consistently named weak axis
  • Treble is smooth and non-fatiguing, with much more top-octave air than the original SA6

Points of contention5

  • Tonality: a natural, welcome step away from Harman, or a warm tilt that trades clarity for euphony
  • Mids: smooth and unforced, or recessed — with female vocals the specific flashpoint
  • Dynamics: whether balanced-armature woofers deliver true slam or a clean imitation of it

A closer listen.

12 topics · 4 divided
Left: criticalRight: positiveTighter lines: more agreement

Tonality

Leans positiveDivided opinions
Reviewer sentiment21 supporting sources
CriticalNeutralPositive

Band: opinion spread · Dot: weighted average

Sources split almost exactly in half. Everyone agrees on the measured shape — lifted bass relative to a lowered, early ear gain, plus extra air — and they divide on whether it lands as a natural, fatigue-free alternative to Harman or as a warm tilt that gives up clarity.

Measured

Across 28 IEC-711-class squig.link rigs (switch off, levelled at 500 Hz against the Harman IE 2019 target, median): the sub-bass sits about on the target's shelf (−1.3 dB at 20–40 Hz), 100–200 Hz runs +1.2 dB, then 2–4 kHz falls 4.9 dB and 4–6 kHz 7.0 dB under the target before 12–16 kHz climbs 7.6 dB over it. The ear-gain peak lands at about 2.7 kHz and only around +5 dB, against roughly +8.6 dB at 4.3–4.5 kHz for the original SA6. TechPowerUp's own bench reads it as an 8.5 dB bass shelf from around 350 Hz.

vs. listeners — The 'bassy' verdict is relative, not absolute: measured against the target the bass is about where Harman puts it, and what tips the balance is the presence region sitting 5–7 dB low. That is the same fact one camp credits for the absence of shout and the other blames for the lost clarity — Resolve calls it a trade of clarity for euphony.

Where it splits
neutral with a bass lift — a deliberate, welcome step away from Harman49%

“Tuning on the SA6 MK2 is overall neutral with a slight U-shape and some sub-bass boost.”

Headfonics
tilted too warm — clarity and the mids pay for it51%

“the overall tonal balance is shifted greatly towards the lows”

TechPowerUp
Link to this topic

The hardware

Specifications.

Checked

Design

Type
In-ear monitor
Drivers
6 × balanced armature (2 Sonion AcuPass vented woofers, 2 Knowles custom midrange, 2 Knowles custom tweeters)6BA
Tuning
Switches · 2 options
Housing
hand-poured UV acrylic resin shell, stabilized wood faceplate

Electrical

Impedance
24 Ω
Frequency response
5 Hz – 40 kHz

Connection

Cable
Detachable, 1.2 m
Connector
0.78 mm 2-pin (recessed)community-sourced: socket depth
Plugs supplied
4.4 mm balanced, 3.5 mmmodular

Manufacturer-published figures, not measurements · from dunu-topsound.com. Socket depth not published by the maker — community-sourced from hands-on reviews: iegems.nk-tran.com, techpowerup.com.

Follow the evidence

Sources 49

1–6 of 49 sources

Read with context

Limitations & method.

As of

What to keep in mind 7

  1. A read of where the reviews land as of October 2026. The SA6 MK2 arrived in April 2023 and the field around it has moved a lot since — several of the cheaper sets critics now prefer did not exist at launch.

  2. Owner scores run very high — none of the sixteen Head-Fi reviews rates it below 4.5 out of 5, and the Amazon rating comes from only nine buyers — because the people who write them are mostly people who chose to buy it. Read them next to the critical reviews, not instead of them.

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