Dom Q’s spot - IEMs and Photography

Dunu Brain Dance – Not quite Brain Damage™, But…

Pros;

Unboxing is befitting of Dunu’s reputation, Cable, tips, case, all top notch
Clean and crisp bass response with great sub-bass rumble and texture
Mid-range detail is hitting above its price point
Treble detail is also hitting above it’s price point
Some tracks have an ethereal presentation
Wide and spacious sound stage

Cons;

The cable is a bit heavy and somewhat stiff above the y-split
The design is… different, it could be your thing, but could not be
Fit is a little tricky, short nozzle with a chunky shell
Overkill with 4(!) planars for the treble
While the bass is snappy and clean, the lower mids are a little too thin at times
Mid-range and treble timbre and tonality is a total mixed bag, it could be great, could be unlistenable
Somewhat forgettable listening experience outside of the technicalities…

Full Disclaimer; This pair of the Brain Dance is part of a tour set up by HiFiGo, so thank you to them for providing this pair for evaluation! Everything I say Is and always will be my opinion and my opinion only.

Test tracks

  • Give Life Back to Music - daft punk - Overall clarity
  • Infinity Repeating - daft punk - Lower mids control
  • Voyager - daft punk - Bass line clarity/busy track layering
  • Overnight - Parcels - mid bass punch
  • Tieduprightnow - Parcels - bass line/sibilance test
  • Justice - Neverender - Sub bass rumble and mid bass impact with treble sparkle balance
  • Daytime - Lunar Vacation - Staging/female vocals w/ heavy bass
  • Days - No Vacation - Vibe test/treble energy
  • Fruiting Body - Goon - Sub bass
  • Wavy Maze - Goon - Mid bass
  • Together - Maggie Rodgers - Female Vocals
  • Slide Tackle - Japanese Breakfast - Sibilance test/consonants harshness
  • Decode - Paramore - Vibe test/stage depth
  • Vinta - Crumb - Stage depth/layering
  • Kim’s Caravan - Courtney Barnett - Female Vocals/resolution test
  • Small Poppies - Courtney Barnett - Distorted Guitar
  • Lifelong Song - Men I Trust - Sub/mid bass texture
  • One and Only - Adele - Female Vocals/consonants harshness test
  • Waves - Wild Painting - Overall Enjoyment and stage depth/width/Bass guitar speed
  • Not the One - Highnoon - Female Vocals
  • Cowboy Killer - Varsity - Layering
  • Alone in My Principles - Varsity - Distorted female vocals
  • Summer Madness - Kool & The Gang - Treble Harshness
  • They Are Growing - Renata Zeiguer - Mid bass impact

Sources

  • Apple Music Streaming Hi-Res Lossless when available → SMSL MDA1 RAW → SMSL SH-9 or Schiit Midgard
  • iPhone 16 Pro Max wired or BT → FiiO BTR17 (No PEQ)
  • iPhone 16 Pro Max wired → Fosi DS2

Purchase link (Un-affiliated) - https://hifigo.com/products/dunu-dk3001bd?srsltid=AfmBOook530rt2Y7rPCQVui31hvvuixuFIUwmf1-cm6Ar2ep9lKpqcLr

Tech Specs;

Price - $499.00
Model: DK 3001 BD (BrainDance)
Cavity Material: Aerospace-Grade Aluminum Alloy
Net Weight: Approx. 8.1 g (per side)
Frequency Response: 5 Hz - 40 kHz
Impedance: 26Ω
122dB/Vrms (@1kHz)
Sensitivity: 108dB/mW(@1kHz) 122dB/Vrms (@1kHz)
THD: <0.5% @ 1 kHz
Dynamic Driver: Flexible Surround Bio-Diaphragm Dynamic Driver for Low and Sub-Bass Frequencies x 1
Balanced Armature Drivers: Custom Midrange Balanced Armatures x 2
Custom High-Frequency Balanced Armatures x 2
Planar Drivers: Custom Micro Planar For Ultra-High Frequencies x 4
Cable: 4-Core Secondary Refined High-Purity Furukawa OCC Copper
Cable Length: 1.2 m ± 0.1 m
Connector: Patented Catch-Hold MMCX Connector
Plug: Q-Lock MINI Modular Plug System
Includes Two Interchangeable Plugs
(4.4mm Balanced, 3.5mm Single-Ended)

Happy 2025, everyone!

Let’s start this off with a bang; The Dunu DK3001-BD. An IEM that I feel took a big part of the community by storm. I am so late to this party, admittedly, I got this pair in a few weeks back right before the holidays so the timing was pretty bad for getting a review out in a timely manner, the tour group I’m in has been super patient with me so, thanks guys, I really do appreciate it!

Since I’m so late to this party, I don’t think I’ll muddy up these threads with a long and drawn-out review. A lot of what needs to be said about this set has already been said so I’ll keep my notes as short as possible. This will most likely be more of a photo dump than anything else, really, sorry for that!

The non-audio-related items are really nice, I genuinely love the cable that comes with this IEM. It’s a thick, nylon sleeve on the bottom before the y-split and a traditional 2-core twist up to the MMCX connectors. The 2-core twist has a matte and smooth finish that feels premium and well made, and the nylon-sleeved section is equally premium-feeling. I love the Aesthetics and the handling isn’t too bad either. It’s a bit on the heavy side and the cable past the y-split is a little memory-prone, but I never had any issues with tangling so that’s a huge plus! The IEMs themselves are a very… unique design that really reminded me of a spaceship or a space station of some sort. They have a futuristic and almost scientifically clean design with small labels on the faceplates like a piece of machinery. If I understand correctly, both the name “Brain Dance” and the design are derivative of the game Cyber Punk, which is cool, I’ve never played the game myself but I know there are tons of people who are big fans. I love that Dunu did something different here. I know looks are highly subjective and while these might not be the prettiest shells I’ve ever seen, I can really appreciate the effort! They stand out and in a good way in my opinion.

Now, onto the sound;

Bass

The Bass is mega tight — sub-bass has a good presence, with a rumble you can both hear and feel. There’s a good amount of air being pushed by the DD in this set. Doin’ It Right by daft punk is presented really well — The song is so simple and to the point — to really appreciate it I feel like you need the right pair of transducers to represent the entire song well, all the aspects of it. The BDs do it well, albeit, less than I’d call ideal for this particular song. Fruiting Body by Goon is another sub-bass test, among other things, but just focusing on the rumble during the chorus here we can clearly hear and feel the sub-bass well in all its textured glory. Again, I’d prefer more of it to balance out the rest of the track as the mids and vocals specifically are produced in a way where they sound very airy and slightly thin, but we’ll talk about the mids later. The mid-bass is snappy, with a very quick decay. There’s texture and nuance with drum kicks, whether that be artificial or from a kick drum. It has a rounder presentation that accompanies tunings that favor sub over mid-bass, meaning, it has a fuller and deeper sound rather than a slamming one. I can appreciate this kind of presentation, it allows the mids to breathe quite a bit, especially female vocals.

They Are Growing by Renata Zeiguer sounds fantastic during the intro, the kicks have that reverb I’m looking for, they’re commanding and once the vocals and other instruments start joining the party, the mid-bass is still present but it does take a bit of a step back from the rest of the band. I’d say the bass isn’t going to satisfy bass heads but it will satisfy bass lovers. Those people who enjoy the quality rather than the quality. Some sets do both really well, In my opinion, these do the quality part really well but could use some quantity for my library. Both mid and sub-bass.

Mids and Treble

I’d say the mids and treble are where the Brain Dance starts flexing on other sets around the same price but then also falls short in some cases… Vocals are extremely detailed and slightly forward in the mix. On some songs, it sounds lovely, angelic even, but on others it might be a bit on the spicy side. Pictures On Walls by Mia Tims is genuinely a journey of a song with the BDs. The kind of production and mastering of that song was MADE for these IEMs. The extra warmth and little recession in the vocals get balanced out by the Brain Dance’s thinner lower mid-range and forward vocal presentation. But then on the other side of the coin, you have songs like Slide Tackle by Japanese Breakfast… granted, Japanese Breakfast usually masters their cuts a little hot in the upper mids and treble, but even some of my other IEMs like the Canpur CP32es which are not a warm IEM at ALL handle that song well. The BDs have that planar tonality up top that can go from sounding heavenly, detailed, and sparkly, to being way too in your face and there just simply is not enough warmth to balance it out.

The summary of it is, the details and layering are all really impressive for the price, but these are not an all-around player for my entire library because of the top end. I can appreciate the impressive technicalities, no doubt about it, but when it hinders musicality too much and swings more towards analytical without much in the way of forgiveness for hotter-produced tracks, I just have to hit the skip button. I think the mids and the treble go hand in hand with this set, which is why I grouped them together in the same paragraph, and depending on your library, neither will work for you.

Techs

Technicalities are, like I said, a mixed bag. On one hand, genuinely, the layering, resolution, detail retrieval, and to a certain degree, sound stage are all very impressive for the money. I’d say these can definitely trade blows with some of the kilo-buck heavy hitters of today’s market. But where they fall short is timbre and tonality and for me, timbre comes 1st. It’s a bit frustrating because on some songs, as I mentioned, these sound fantastic. Ethereal, engaging, fun… On the songs, they just don’t and I’m reminded of the 4 planar drivers which just completely takes me out of the music.

To sum this all up, I really really wanted to love the Brain Dance. I love the accessory package, particularly the cable, I think it looks the business. I think the shell design is super interesting, being ceramic-coated aluminum with a design that stands out is dope. I think more companies need to take more risks when it comes to the aesthetics of their IEMs. The bass is great, honestly, I can’t complain. If these were tuned with more, it’d be even better and I do know some folks in the community like Jay have mentioned using an impedance adapter which I think would help with my qualms on the sound but, in their stock format, the Dunu DK3001 BD can be summed up like this; Impressive technicalities with a truly detailed and sharp presentation that suffers from being overly sharpened. I enjoyed half my time with the Brain Dance with the other half being a forgotten experience.

I wouldn’t call them Brain Damage, but my volume knob has certainly seen a lot more counterclockwise movement these last few weeks using the BDs…

Thanks so much for reading and I hope everyone has a wonderful and prosperous New Year!

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If only the braindamage sounded as good as your pictures look…

Stellar write-up and pics as always brotha :fire:

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I think they should ship this with an impedance adaptor for those of us that like more low-end and can take the hit to sensitivity. Look forward to trying this one some day!

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Excellent, informative review, Dom. I know you’re not a contrarian by nature, but it is refreshing to read some constructive criticism of the BD, which has received seemingly nothing but hosannas from the community and reviewers.

Well done, man.

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Great review! It’s always refreshing to see a thorough take, you really captured the highs and lows of the experience with the BD.

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You better trademark “Braindamage”, bro, that is absolutely hilarious :sweat_smile: had to throw the little in there just in case :wink:

I think that’s a phenomenal idea, brother, I completely agree. A bass toggle would of been nice too. A little screw on the faceplate, it would have went really well with the aesthetics too!

That means a lot coming from you, Paul, thank you, brother.

I try not to be a contrarian just for the sake of being one, but rather, as fair as possible. I call em’ like I see em’!

Thanks a bunch! I’m glad you found it informative! I appreciate you reading :call_me_hand:

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Sorry for being that guy, but I think there is a common misconception in the community about what impedance adapters do and that they increase the bass as a general truth. But the fact is the only thing they do is - well - increase series impedance (exactly just like source output impedance adds to the series).

And depending on the driver config, crossover or in general the set impedance curve and the proportions of impedances in different frequency ranges it may either increase, decrease and not change the bass amount (as compared to mids/highs) at all (when the impedance curve is flat across the spectrum).

The bigger the impedance in bass range as compared to others the less the added extra lets say 10 Ohms matters proportionally.
Lets say you have a set with average flat 30 Ohms in “bass range” and flat 10 Ohms in rest of the spectrum. Adding 10 Ohms to 30 Ohms in bass is like 33% increase (and in the same time decrease in sensitivity), where adding it to the rest is increase of 100%. And the less resistance the more sensitive the set is in that range, so…

See example of this Heartfield IEM which would in fact decrease in bass with impedance adapter


This is how each frequency is affected by output/added impedance (in plus and minus dB of magnitude)

You could think of it like having a glass and a teaspoon of water and adding same size drop of ink to both. It would make the water in teaspoon much more colored and less translucent in same time as compared to the water in glass.
Does it make sense at all what I wrote, because I am not sure? :smiley:

It may in fact work with Dunu exactly as you would expect but we can’t be sure unless we see impedance curve :slight_smile:

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You’re absolutely right!

Impedance adapters aren’t going to be a fix-all solution for every IEM. To your point, with some IEMs it increases bass, but in other it could increase upper mids, treble, decrease bass… I’m not exactly sure how to tell what an impedance adapter would do on specific IEMs, but I do know it doesn’t do the same thing for all.

I always appreciate the scientific explanations for the hobby, you made sense and didn’t come off as pretentious! I think you’re just sharing your knowledge which I always appreciate!

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Perfectly written and explained. In this exact post that you quoted, it was regarding a specific IEM where we know what he impedance adapter does, both from graphs and listening😊

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Well, I must have missed the memo on that being tested in real life for Braindance :slight_smile: I just see the impedance adapter being mentioned a lot as a solution for “bass-light” sets and wanted to help in adding a doubt if that would be working no matter the circumstances

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The only way to be certain is to have the measurement of impedance across the frequency range, which is not very easily doable at home and not done almost at all in most reviews I know of.

One particular source is reference-audio-analyser.pro website I posted pics from in previous post, but it has not a very big database of measurements :+1:

Ed: or, well, one can test and measure FR in real life obviously. It is a sign rhat I am more into theory than practice recently :man_facepalming:

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Given the state of the Discovery thread currently - how refreshing to mix technical knowledge and subjective experiences without an issue and with a genuine want for understanding - withholding any bias/personal motivations.

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Sincere question, as I want to learn: What are the advantages of using an impedance adapter over parametric or analog EQ?

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Generally speaking - there isn’t any… unless your a dongle size queen :man_shrugging:

(Well more seriously perhaps if you had an amp with a very high output impedance and your trying to balance there is a case but that will not apply to 99.9% of people and using a voltage divider to lower amp impedance is actually a better way of achieving this)

In general if your doing this for sonic quality / you will have far more control with PEQ

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Appreciate the speedy, informative reply, mate!

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Assuming that the imp adapter changes things exactly like you want it, and you compare that solution to PEQ. There are no advantages except not needing to use something compatible with PEQ. Disadvantages are for example, it probably cost you more to get the imp adapter than PEQ, you now have a longer/heavier cable and that volume will be lower now.

Of course this is with the assumption that the adapter does exactly what you want, in most cases you have MUCH better control via PEQ.

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Thanks for the explanation!

Yes, my comment was based on graphs and opinions I’d already seen with this IEM and impedance adaptors. Wish I could’ve shared them in the post but don’t remember where they were :sweat_smile: somewhere in the labyrinth that is the HeadFi Discovery thread I assume :skull_and_crossbones:

Oh, here it is from @Jaytiss ! Thanks :slight_smile:

Pretty serious right-tilt.

@pk500 for people who don’t want to mess with EQ software, impedance adaptors can be a nice convenience. They can also lower the noise floor on noisy sources. You won’t get that effect using EQ, because EQ is always “lowering” the relative output of the DAC signal, meaning you need to up the amplification and will be more exposed to your source’s noise floor. This isn’t a big deal on modern digital sources (I’ve only noticed the noise floor on my old iPods, when using sensitive IEMs).

However, you always pay a price with efficiency (your amp has deliver more power to have give the same SPL when using an impedance adaptor). EQ also requires, more power, but it’s more flexible so there could be cases where you get the desired effect with less degradation of efficiency. That’s nit-picking though.

Okay, just to put this simply: if you’re up for setting it up, EQ is pretty much always the better option over relying on impedance adaptors.

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No you are absolutely right, and I am afraid many people don’t know that! Your explanation was excellent. Someone posted a graph of BD stock and with impedance adapter, but I can’t remember who….:sweat_smile:. @VIVIDICI_111 @Jaytiss, was it one of you??

Edit: Should have read the rest of the thread before answering!! :sweat_smile:

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I’m so late to this discussion, which I really appreciate btw, guys. Correct me if I’m wrong, but doesn’t EQ (in most cases) degrade SQ compared to physical modifications like dampeners/impedance adapters/filters over nozzles etc.? I am genuinely curious.

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Without any scientific background and only speaking from my own experience there is zero degradation in sound quality when using EQ…the opposite is true for me…If you know what you are doing or at least know how to use the tools that help you with equalizing the sq only gets better.

Of course the drivers need to be of good quality and the changes in a reasonable frame.
Also you should use a negative preamp to avoid clipping.

I usually try out presets from www.autoeq.app or use the AutoEQ function on squiglink and then make some minor adjustments if needed.

In the most recent case i auto eq´d Cadenza12 to the HBB2022 target which is perfect for Hip Hop, Techno and as an allrounder for not so critical listening sessions, but for more gentle, clarity focused music and more critical listening i just lowered the bass by 2db…so simple, so effective

I tend to have two EQ profiles for the IEMs i own.

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