Dunu PRS6 Review – Mids First, Everything Else Second

 

General
DUNU needs no introduction at this point. They have been releasing one tribrid after another, and the DN142 and DN242 are still some of the more popular picks around their price range. The PRS6 is a different story though. It is DUNU's very first IEM to use a MEMS driver, and they have decided to launch it at $249 instead of saving the new tech for a flagship. That alone got me curious.

Inside each shell is a 6-driver tribrid setup: 1 custom 10mm dynamic driver handling the lows and sub-bass, 2 midrange BAs, 2 mid-high BAs, and 1 silicon-based passive MEMS driver for the ultra-high frequencies. Everything is tied together with a 4-way crossover that combines both physical and electronic filtering. Impedance is rated at 43Ω with 112dB/mW sensitivity.

Packaging is the usual DUNU affair, which means you get pretty much everything you need right out of the box. There is a new spacious carrying case, a cleaning tool, a 6.35mm adapter, and 4 types of eartips (S&S, gray balanced, red-nozzle and memory foam). DUNU has also thrown in an acrylic stand featuring their anime mascot. Not my cup of tea personally, but it doesn't hurt either. The stock cable is a 4-core silver-plated OCC copper cable with 0.78mm 2-pin connectors and the Q-Lock Mini modular plug system, so swapping between 3.5mm and 4.4mm takes just a few seconds.

Now, the faceplate. This is easily the best-looking IEM DUNU has made to my eyes. The faceplate is pure titanium with an ice-crystal pattern, left exposed without a resin layer over it, and the way it catches light is something photos simply cannot capture. Paired with the dark resin shell, it just looks stunning in person.

The shell is resin with a resin nozzle, and there is a small concha fin bump that helps to lock the IEM in place. Comfort is decent for me, but I did need a bit of tip rolling to get the best seal. Do take note that the bass quantity relies heavily on a proper seal, so if the PRS6 sounds thin to you, try going a size up or use a wider bore tip. No driver flex and no pressure build up was noticed on my unit.

Gears Used for This Review

• Aune S18 Evo DAC

• Aune S17 Pro Amp

• Burson Conductor Stellar

• FiiO M33 R2R

• xDuoo Link3

• FiiO K17 R2R

• Laiv Crescendo Verse

Foreword
My review is solely based on what I hear via my equipment and I never consider my reviews to be objective in any way rather a subjective approach. Do take into consideration that everyone's ear anatomy is not the same, so the psychoacoustics perception might be different as well, but i believe it will not stray too far.

Sound Impression

The PRS6 has been put through my burn-in rig for approximately 40-50 hours before any critical listening. The treble settled slightly and the upper mids sound a tad smoother compared to fresh out of the box. The overall tuning is a neutral-ish signature with the midrange taking centre stage. The bass is there to support, the treble is there to add clarity, but the mids are clearly where DUNU put most of their attention. To my ears, this is a mids lover's IEM first and foremost.

Bass

• Sub-bass extends deep enough without any obvious roll-off, but it is only mildly elevated. Billie Eilish's Bad Guy still has its low end rumble, just not the visceral kind that shakes your eardrums.

• Mid-bass is kept lean and quick. Kick drums have a decent punch with clean edges rather than a big, slow thud.

• Bass speed is good. Slipknot's Duality is handled without the drums smearing into each other, and the attack has a nice snappy feel to it.

• Texture is average. On Daft Punk tracks, the low frequency rumble can sound a little soft in definition compared to more bass-focused sets.

• Bass doesn't bleed into the mids at all, which is exactly why the midrange sounds as clean as it does.

• Bassheads, look elsewhere. This is quality over quantity, and the quantity is on the lighter side.

Mids

• This is the highlight of the PRS6. The midrange is rich, smooth and natural, with a slight hint of warmth from the linear lower mids.

• Vocals are placed slightly forward. Picture the artist 3-4 steps in front of you, close and intimate, but never shouting at you.

• Male vocals have decent body. Zhao Peng's low baritone retains enough chesty weight to sound convincing, though it is not the thickest or fullest rendition I have heard.

• Female vocals are where the PRS6 shines the most. Faye Wong sounds clean, airy and well articulated, with good texture on her delicate breathiness. Na Ying's powerful passages come through with good density without turning shouty at normal listening volume.

• The upper mids rise smoothly, around the 2-3kHz region, so vocals come forward naturally rather than being pushed by a sharp peak.

• Instruments sound natural. Guitar plucks have enough bite, piano notes are realistic, and strings have good clarity, if a bit gentle in their expression.

• Purely nitpicking, but at higher volume the upper mids can pick up a slight sheen on certain high-pitched vocals. Keep it at moderate volume and you won't have any issue.

Treble

• The treble doesn't sound dark to my ears. It sits around neutral with good clarity and enough energy to keep things lively, while staying clear of harshness.

• Do take note that I have seen some listeners describe the PRS6's treble as darker. Source pairing could be playing a part here, and my chain might be adding a little more energy up top, so take my impression with a pinch of salt.

• No sibilance and no metallic timbre at normal listening levels. Treble sensitive folks should still be comfortable with this.

• Hi-hats are crisp and well defined, even on busy tracks. Cymbals have good presence and decay naturally without lingering too long.

• Metallica's Lux Aeterna keeps up well with the fast cymbal work, every crash and hi-hat hit staying distinct rather than smearing into each other.

• The MEMS driver is where things get interesting. It is not there to throw sparkle at you. Instead, it helps a lot with the spatial cues. Instruments sound very accurately placed, and you can pinpoint exactly where each element is coming from. To my ears, this is the biggest contribution of the MEMS driver, and it is a very welcome one.

Soundstage / Imaging

• Stage is average in size. Width is good, height is decent, but depth is limited, which makes it sound slightly 2D-ish at times.

• The presentation is more intimate and in your head, rather than an expansive hall like effect. YungBlud's Zombie Live from Bludfest sounds engaging but lacks the sense of space a live recording deserves.

• Imaging is the strong point of the technical department. Instrument placement is very precise, which I credit largely to the MEMS driver, and it also explains why DUNU is pushing this for gaming.

• Instrument separation is decent. On Hans Zimmer's Why So Serious, the layers remain distinguishable, but busy passages do get a little crowded due to the limited front-to-back layering.

• Detail retrieval is decent, not class-leading. Macro details are clear, micro details are presented in a softer, more natural way. Technicalities are not the main highlight of the PRS6, and that is fine because it was never meant to be a detail monster.

Driveability

• Aune S18 Evo DAC + S17 Pro Amp: Clean and transparent pairing. Bass gets slightly tighter and the stage opens up a little in width. Noise floor is pitch black.

• Burson Conductor Stellar: Adds a slight warmth injection and more body to the low end, making male vocals sound fuller. Lovely for long vocal sessions.

• FiiO M33 R2R: The R2R presentation smooths the upper mids further, making the PRS6 very relaxing and easy to listen to. Imaging is slightly softer compared to the Aune stack though.

• FiiO K17 R2R: Good balance between the two above. Tonal density improves, but don't overdo the volume as the upper mids can get slightly hot.

• xDuoo Link3: Drives it with no issue at all. Sound is slightly less refined than the desktop stack, but you are not missing much.

• Laiv Crescendo Verse: Clean and composed pairing with good dynamics. A nice match if you want to keep the PRS6 neutral.

Comparison
Dunu PRS6 vs Thieaudio Hype 4 MKII ($249 vs $399)

Build & Design: The Hype 4 MKII uses a CNC-milled aluminium shell, which feels sturdier but also heavier in the ear. The PRS6's resin shell with the concha fin is lighter. Both come with modular cables, and both cables are of good quality. Aesthetically, the PRS6 wins hands down. That titanium faceplate is just in a different league.

Bass: The Hype 4 MKII runs 2 dynamic drivers with Thieaudio's IMPACT2 subwoofer system, and you can hear it. The sub-bass is slightly more rumbly and the punch is noticeably stronger and more physical. The PRS6 is leaner and lighter, though still quick and clean. If bass impact matters to you, the Hype 4 MKII takes this.

Mids: This is where the PRS6 takes it. The Hype 4 MKII's midrange is cleaner and leaner, but it is not as rich and lush. Vocals on the PRS6 have more body and sound more emotionally engaging, especially female vocals. To my ears, the PRS6 is simply more enjoyable for vocal-focused music.

Treble: Both are clean and well extended. The Hype 4 MKII has slightly more sparkle up top, while the PRS6 is a tad more composed. Where the PRS6 stands out is how precisely instruments are positioned, thanks to the MEMS driver.

Soundstage & Technicalities: The Hype 4 MKII is slightly better here. Its stage is slightly more open, separation is cleaner, and detail retrieval is a notch above. It doesn't run circles around the PRS6, but the difference is there when you switch back and forth.

Verdict: The Hype 4 MKII is the better all-rounder with stronger bass and slightly better technicalities. But it also costs $150 more. If you listen mostly to vocals and you value rich, natural mids over everything else, I would personally go for the PRS6. It gives you the part that matters most for vocal lovers, at a much friendlier price, plus a faceplate that looks far more expensive than it actually is.

Final Thoughts
The PRS6 is not an IEM that tries to do everything. It does not chase the biggest bass, the sparkliest treble or the widest stage, and its technicalities are average for the asking price. What it does is deliver a rich, smooth and natural midrange that is genuinely enjoyable to listen to, wrapped in one of the most beautiful faceplates I have seen at this price. The MEMS driver doesn't go for flashy sparkle, but it earns its place by making instrument positioning very accurate, and that is a smart way to use it. As it stands, the PRS6 does everything alright, and it does the midrange really well. 

The Dunu PRS6 was sent over by DUNU for the purpose of this review. Big thanks to the DUNU team for the support and opportunity as always.

Head over to their store if you are interested in getting a pair:

• DUNU | PRS 6 — Non Affiliated