Tansio Mirai RGB

General Information


Tansio Mirai RGB Flaship 8EST + 9BA Hybrid TOTL HiFi Audiophile 2Pin 0.78mm In-ear Earphone IEMs with Tuning Switch


Sound Design

We know that balanced armature with electrostatic can achieve better consistency, and can obtain highly uniform smoothness and more advanced hearing sense, so we further break the limit of balanced armature, especially strengthen the low-frequency expressiveness of the open-hole balanced armature, stronger atmosphere sense, make up for the shortcomings of balanced armature's low frequency to the greatest extent, and make the overall sound of earphones more coherent, greatly raised the upper limit of the sound level. Eight electrostatic drivers on one side allow the sense of space and layering of sound to achieve an incredible new height. Super strong sense of presence and air makes listening to music relaxed and enjoyable.

Appearance design

The high light luminous glass tube is hand-made to form RGB effect, which forms a strong contrast with the starlight black panel. It can absorb natural light and shine for a period of time. It can also use the complimentary custom ultraviolet flashlight (which needs No. 7 AAA battery) to irradiate and quickly produce high brightness luminous effect.

Packaging design

The main body is made of walnut box with warm texture, and the built-in earphone bag is handmade. It is made of Italian vegetable-tanned leather, which is the first layer of cowhide tanned with natural plant dyes. The surface of the leather retains the grain and luster of the leather itself, making it natural and primitive. Vegetable-tanned leather skin will change color with time, the color will show different effects as the time of use increases, which is a way of “raising skin”. Under the "feeding" of time, slowly forming signs of aging is it cannot be reproduced, which is also the charm of Vegetable-tanned leather. The packaging also contains illustrations drawn by the founder of TSMR, as well as product introductions, instructions, and exquisite metal accessories boxes to further increase the layering of the packaging.

Collocation recommendation

When debugging this earphone, we refer to the following devices for tuning

1: IPHONE 13 PRO MAX+ AudioQuest decoder DragonFly Cobalt

2: Lotoo Paw Gold Touch player

To get the original listening experience, you can use standard cable + standard medium green silicone eartips +020 standard tuning


Model: RGB

Driver configuration: 17 drivers (4 Sonion open-hole for ultra-low frequency, 4 Knowles for middles frequency, 1 Sonion for high frequency, 8 Sonion electrostatic for ultra- high frequency)

Frequency division design: 4-way crossover, 5 channels

Impedance: 26Ω@1kHz

Sensitivity: 106dBL/mW

Passive noise reduction: 26dB

Frequency response range: 5-80 kHz

Technical application: cavity opening-hole optimized low frequency technology, ultra-fine copper tube optimized low frequency technology, switch tuning technology

Tuning mode instruction

0 means push down, 1/2/3 means push up

Mode 1:
100: Bass enhancement mode

120: Mixed tuning

Mode 2:
020:All balanced mode

103: Mixed tuning

Mode 3:
003: high frequency enhancement mode

023: Mixed tuning

123: Mixed tuning (lowest impedance)

18 months warranty

Latest reviews


Headphoneus Supremus
Engineering beauty - a micro-detail monitor
Pros: - Good bass/mid/treble balance with switches to customize
- Excellent soundstage presentation and layering
- Light and comfortable
- Fun RGB light and engineering result to look at
- Nice practical package
Cons: - Treble could be fatiguing depending on music
- I wish there were more macro dynamics and depth


Tansio Mirai RGB picked my interest for it’s Traillii-like configuration boosted by a whopping 8EST drivers. I heard good things about previous models (Spark & Land) but never had a chance to hear them. I figured this might be a good time to try, and I figured I might as well jump to the TOTL offering – RGB.


This was my first-time purchasing from Penon Audio (Hong Kong). I ordered it on Thursday and it arrived the following Tuesday in the US. You get minimal notices and updates by today’s online shopping standard, so slight anxiety at first. It was all good once things got moving with DHL. I will be more confident ordering from Penon next time.

The Package:

Many TOTL comes with a big package which I am not a big fan of. RGB comes in a very compact package but it is functional, luxurious, and well-executed. I really like this packaging style. The box measures about 7in (18cm) wide.





The switches for RGB are interesting so I decided to write separately about this. It has 3 switch per side setup that is becoming quite popular – my FAudio Mezzo comes with similar switches. First, regardless of L/R piece, the switch is identified 1/2/3 from left to right (i.e. they are not setup to be mirror image L-to-R). The three switches are assigned to bass/mid/treble. They don’t, however, implement a trivial boost/reduction of respective areas. Starting with the baseline 020 (default, off-on-off) setup, I heard it as follows:


100 (on-off-off): Noticeable increase in midbass warmth. Slightly reduced upper mid and treble.

103 (on-off-on): Not as warm as 100. Reduced mid forwardness. Cleanest upper mid and treble. Treble is most extended of all setting.

120 (on-on-off): Similar bass to 103. Mids are between 100 and 103. Treble is similar to baseline 020. On some music, I heard bass sound like being played in a small room. I don’t get this with other settings.

I took the measurements below and the measurements generally correlates with how I heard it. Please note that my measurements are not calibrated against other public reviewers so it is only meant to show the relative effect of switches with my unit.




General Impression:

My initial impression out of the box (020 setting) was 1) pretty good balance with mild mid to lower treble forwardness, 2) fast rising edge like piezo tweeter but with EST effortlessness, and 3) decent note weight across the spectrum. Coming from Traillii, it was immediately clear that the added drivers were contributing to the extra note weight. Out of the box, the upper treble had slightly tingy/digital texture to it but that has softened after 40+ hours of use.


I really enjoy RGB with solo acoustic guitar, singer-songwriter, and small ensemble rock/jazz/classical music. In my opinion, the fast transient response of RGB plays stringed instruments very realistically. The attacks and decay on the steel strings are done very well and reflect how I hear it when I play something like this.

For busy pop/rock/metal songs, however, RGB became a little too much of a good thing. A little too forward and hitting upper treble sensitivities.

The good news is that RGB responds well (transparent?) to cable and source changes so some of the tonal characters can be attributed to the cable/source pairing.

Some more impressions with 020 baseline setup:

  • Soundstage: Soundstage is somewhat narrow and the music is presented in a flat plane in front of me. I don’t get a sense of great depth from RGB. It is actually unremarkably normal in that instrument placement sounds accurate and the layering sounds natural. Drum components often fail when there is an imbalance between bass/mid/treble (e.g. splashy cymbals coming forward and withdrawn snare in the back). With RGB, I hear vocals, guiars/bass/keys, and drums coming from the right places, so it makes for a very natural listen. It’s not stretched out wide like Traillii, nor present extra depth like BCD-equipped IEMs. It’s all there in front of you and this will come down to individual preferences. Instrument separation and detail extraction are excellent, and I would classify as TOTL category in my view. I believe the fast transients contributes these strengths.


  • Treble: Treble is where the RGB really stands out. The 8EST treble has probably the most weighty sound I have heard from EST based IEMs. There’s good amount of meat to the bone. I hear Traillii and Xe6/Rn6 EST trebles as more airy and effortless while providing excellent resolution. RGB treble has more physicality being more forward and weighty. It approaches piezo based treble in my opinion, just not as hard. Still maintains effortlessness of ESTs. The sharp rising edge and physicality produces one of the best reproductions of steel string acoustic guitars and electric guitars. The attack of nails and picks hitting the strings comes through very realistically. Unfortunately, I can see this as a negative for some listeners who prefers smoother presentation.

  • Mids: To my ears, RGB mids have fairly elevated pinna gain area which contributes to the forwardness and the soundstage described earlier. Both male and female vocals pop out and are rendered in slightly dry but clear tone. RGB works remarkably well with singer songwriter type music and small ensemble acoustic instrumental. Instrument timbre is good, slightly on the drier side with well defined leading edge and natural but relatively short decay. Perhaps an opposite of euphonic. Instead, I’m in the music hearing details of each player.

  • Bass: Bass is neutral and present on RGB. This is certainly not a bass canon. I would say that it is a typical BA bass with slight warmth. Bass is also fast with good amount of micro-details. It doesn’t thump and dance like a DD. It’s a neutral bass that is there to seamlessly support the music.

I think RGB is a well-executed neutral set that can be tuned via switches for a little extra flavor. If you like lots of micro-details and engagement while getting the correct instrument placements, this set is certainly worth a try.
Last edited:
I like the feature of the switches. That's really great.


Headphoneus Supremus
Tansio Mirai RGB - Leave some driver's for the other guys!
Pros: Great size and fit
Insane attention to detail
Plays well with most sources
Healthy BA bass
Exceptionally micro detailed mids
Treble extension for its treble extension
Cons: Lacks DD bass qualities being all BA
Some may prefer warm mids over super detailed
Treble detail can be overwhelming at times

Admittedly I had heard quite a bit of buzz surrounding this IEM, but I didn’t investigate it as I have been satisfied with my current line-up / burned out with the hobby and didn’t want to spring for another kilobuck offering.

Fortunately, I was afforded the opportunity to spend some time with the Mirai RGB and I must start off by saying it surprised me on many fronts.

First thing I wasn’t expecting was its size. It’s probably one of the smallest form factors in an IEM that I have seen for quite some time. Go figure, I was taken back by the size, only to look inside and see a mass of drivers quite unlike anything I’ve seen. This thing is jam packed, seriously… 17 drivers lol? Like What mate?

Then I turned it over and learned it had switches for different tuning modes. Ok, color me impressed at this point and I haven’t even heard the damn things. Now, after playing with the modes, I ultimately left it with ‘1’ switch up for maximum low-end performance which is where I found it to my liking. So, all my impressions are coming from that orientation.

I decided to run it through a few sources, such as: Chord Hugo 2, LPTG, iFi xDSD Gryphon and the iFi GoBlu (for that budget OTG listener). It scales well and I am summarizing all the sources average in my impressions.

The bass isn’t pumped out by dynamic driver’s, which is what I typically enjoy most, but it is enjoyable since it is still encompassing (especially the mid bass) and it’s very accurate. Sub bass is honestly probably at the correct elevation or presence for most tracks, but it lacks the reach, impact and textured rumble of dynamic drivers. Despite their typically slower response and reproduction rate, it’s a tradeoff that I still prefer since dynamic drivers have come a long way. However, the Mirai RGB incorporates bass well into the overall cohesive nature of the IEM. Very snappy, tight and separated.

Mid-range is a completely different experience with all the attention given to its neutral-ish tonality and micro-details. I’m guessing it has to do with that extra EST given full-range abilities to give those little extra details that push. Either way it works out to provide some extra texture in vocals, and instrumentation in that range. It’s not something that gets in the way or is in your face, its just there as a bonus. It was also something I noticed pretty immediately, which sent me on a mission to see exactly what was incorporated in the IEM to produce that. So, it wasn’t a case of, “Oh, I know that’s in there and supposed to do that”, it was the opposite. Simply put, the Mirai RGB has an incredibly detailed and seamless overall mid-range. It isn’t as warm as something like the Traillii but it avoids being sterile sounding as well.

I could definitely go on and on about the execution of the Mirai RGB’s treble. It has all the extension, detail, and air you could ever hope for in any piece of audio equipment. It’s fantastic treble as a whole but, it did come off a bit cold at times, ever so slightly lacking that warmth or richness, I personally enjoy. I am also open to being incorrect about that and just not being used to the sheer amount of treble being rendered in such detail at once. It’s not in your face or over-taking anything else, rather a philosophy of no trebles left behind. Laser precise attack and decay with all the texture, and I mean all of it. If a drummer even looks at a cymbal, you hear it. This could end up being your reference set for treble or it could be a tad bit too distracting for you. It’s glorious either way. I’d recommend “Polyphia – Playing God”, to really get a feel for the treble rendering because Clay Aeschliman dances around on cymbals like few others I have heard.


Overall, what I quickly learned was this little Mirai RGB left the same initial impressions as the Traillii did. I wasn’t blown away by anything in particular, but that was because everything is executed so well, it almost goes unappreciated or unnoticed without further listening. That to me, is a party trick in itself and one I have learned to value over almost any other trait in this hobby. The bass, mids and treble are all good but the Mirai RGB’s specialty to me, is the fact that the entire frequency range is addressed individually. It’s obvious every driver is maximized to be as revealing and detail oriented as possible. It’s not 17 drivers for the hell of it, its 17 drivers because they found a way to use all 17 individually to detail the cohesive sound they were looking for. Again, the treble does stand out a bit but not in the traditional, overly elevated position in the tuning. It’s just the nature of that frequency when you really put in the effort to make it all available.

For $2999 new they are fairly represented and for the asininely depreciated secondhand market used prices, these things will be nearly unbeatable. Unless you need that DD bass or a bit more warmth.

Personal ranks against others in the realm- I only rank IEM’s against other IEM’s that I have extensive time with and that are currently available for sale. Some demo units I have heard are subject to change. So, if some aren’t represented, those are the reasons why.

Bass: Odyssey > Rn6 > Odin > Traillii > Mirai RGB > U18s > Trifecta

Mids: Traillii > Mirai RGB > Odin > Rn6 > Odyssey > U18s > Trifecta

Treble: Mirai RGB > Odin > Odyssey > Traillii > Rn6 > Trifecta > U18s
Nice review, thanks!

Bass: Odyssey > Rn6 > Odin > Traillii > Mirai RGB > U18s > Trifecta

Wondering how Trifecta with 3 DD is ranked last for bass ?:thinking:
Just the implementation.


Headphoneus Supremus
Tansio Mirai RGB - The end Of The Line
Pros: Absolute peak of Tansio Mirai design and sound.
All resin form incorporating 17 Premium drivers per side
4 Sonion Acupass vented BAs- Accurate tight detailed low hitting bass.
4 Knowles BAs- highly refined holographic mids presentation
1 Sonion full range treble BA- Treble foundation for accuracy and detail
8 Sonion ESTs- For treble definition, air, sparkle and extension. Superior treble articulation.
Superb reference balancing with a slight lift for subbass and trebles
One of the most holographic supremely layered sounding IEMs in the world
Stunning display for vocals and instruments alike.
Airy, accurately detailed from end to end. Not a single note or nuance gets overlooked.
Highly technical, Timbrally accurate, ethereal voicing, standout imaging, superb sound separation
Scales to cable changes like crazy ( Read the review)
17drivers but not an overly large IEM. Supreme comfort with very good passive isolation.
Sounds fantastic even on a $100 source.
Surprisingly versatile for the eclectic music listener.
Arguably one of the coolest ideas for a face plate.
3 tuning switches that gives added tuning adjustments on the fly
Cons: Price?
Lacks a touch of sub bass rumble but easily makes up for it with its superior bass responsiveness, definition, tightness and speed.
Tansio Mirai RGB

RGB shown with ISN CU4 cable for a smoother meatier take on the RGB sound. Uplift in bass and mids presence with a slight smoothening of the trebles. More musical sounding.

Tansio Mirai has been making IEMs for the past 5 years, their design models traditionally are all universal and custom multi BA resin form IEMs. They have dabbled a bit into making their first tribrid in the Lands, and a hybrid with a dynamic in the Sands and their former flagship the Akiba replaced the Sparks with both IEMs utilizing a mix of BAs and EST drivers. With the recent launch of the new benchmark for Tansio Mirai in the RGB. I was lucky enough to have an audition with Tansios newest creation. This time the driver count has increased as well as its price point. Selling currently at $2,999 the leap from their former flagship the Akiba at $1,550.
You can look up the official sales pages for the Tansio Mirai RGB on Penon audio website here.

The question is does the price reflect the value of the RGB?

The quick and dirty answer to that would be an enthusiastic yes, of course that is just my opinion but going off of today's TOTL level IEM going rates. This is unfortunately the entry fee for such designs and will be very much comparable if not actually better to much pricier offerings from other manufacturers with something that Tansio has always been good at in the mix leaving the RGB to stand tall as their current high end bench mark for sound. The new RGB in design is not too different from what was already established in the Akiba. Both are using a mix of premium BAs and EST drivers. 7BAs+4ESTs in Akiba. The new RGB now uses 9BAs+ 8ESTs. Specifically 4 Sonion vented acupass bass BAs + 4 Knowles mids BAs+ 1 Sonion high frequency BA + 8 Sonion EST drivers.

That makes for an increase in the driver count from 11 drivers to a crazy 17 drivers. Now we all know the idea of more drivers does not necessarily mean it will have “better sound.” But what if all them drivers were utilized and tuned with a purpose for maximum ability and sound? You figure that would be the goal for anyone that makes such products but one aspect I can understand from the designers of the RGB is that with each successive release. I have steadily seen an upgrade in sound from their prior releases. Now with the absolute best I have ever heard in the RGB. After hearing the RGB and going through the paces for my impressions here, I can clearly understand why they are charging the premium price tag to attain a set.

Another question would be, does the driver count alone warrant doubling the price?

No, but then the RGB is not just about increasing the driver count and calling it good. There is a clear purpose to the madness in the RGB sound design. In the personal audio industry, advancement and refinements to sound is always good but the negative aspect of advancement is that the cost of getting such advancements will increase. Today's high end IEMs for me anyways have to be a lot of things. It has to be refined in all parts of its sound, the sound has to be memorable and more importantly it has to have versatility or it will be relegated to part time use. Don’t know about you but I can’t be spending 3K level money and have an IEM you only use on occasion for some types of music and not others is my point. It has to be one of the best sounding IEMs at any price and separates itself from the mid fi 1k or even 2K priced level IEMs.

Does the RGB do that?

This is the question I will try to answer with this preview/review.
The new RGB is a leap in its design, tuning and sound from the smaller company that is Tansio Mirai. This is coming from a person that has listened and scrutinized just about every single release they have brought out to the masses, including their former flagship the Akiba.

Listening to the RGB is clearly a memorable experience and it doesn't matter if you're listening from a cheap $100 dap to a $3K one. There is something special about the sound of the RGB that makes it clearly worthy of its asking price.

So the difference for the RGB vs their former flagship the Akiba. More drivers is the first thing to stick out, going from 11 to 17 per side. The part that sticks out the most for the RGB design to me is the use of 8ESTs. 8 my friends. Traditionally 4ESTs are used for the upper treble region to give the trebles a defining finish, shine, sparkle, extension and air. I have IEMs that use 2ESTs vs 4ESTs and I have to admit as long as the tuning aspect for the IEMs are in line. I really can’t tell too much of a difference going from 2 to 4ESTs. Can’t say if there is a defining difference going from 4EST to 8ESTs but what I am hearing from the RGB sound has to be one of the airiest spacious sounds I have ever heard from an IEM. And perhaps that is what the RGB sound does the best. Its sense of air has to be among the best for IEMs at any price and I am talking about the entirety of its sound, not just the treble.


The RGB is different from the other EST infused IEMs I have reviewed and owned, something about using more ESTs here for its upper treble. Better efficiency, better overall tonal coverage perhaps? Better articulation, which could be the results of dedicating what looks like two out of the 5 sound tubes/ tubing in the nozzle for the ESTs alone. That is another difference between the Akiba and the RGB. 5 sound channels or sound holes out the nozzle vs 4 in the Akiba. The reader about the RGB does not indicate what part of the frequency each sound hole is dedicated with but upon careful inspection of the make up and nozzle of the RGB. There are 3 sound holes that seem to be dedicated just for the treble presentation of the RGB. Which when hearing the RGB for its treble presentation makes a lot of sense.

One for the full range treble Sonion BA, and two sound bores, a set of 4ESTs per bore. I am guessing each EST bundle was tuned to cover more of the overall treble aspects of the RGB. For example one set to work in conjunction with the treble BA for the lower to mid trebles and another set of ESTs just dedicated for the upper trebles. Again a guess on my part. Why would you need 8ESTs for just the upper trebles with two sound tubes is my question?. In any case, why all this attention on the treble design aspect of RGB?. It is because the treble of the RGBs is what makes the RGB stand out from other high end IEMs. It isn’t just a wall of treble if that is what you're worried about. It is the RGBs ability to pick off the tiniest, faintest nuance of micro details with all of its extension, effects and definition in a full dimensional manner. What that does for stringed instruments and even for vocal performances is quite astonishing. You can say this is how a true high end IEM should portray treble.

I have always thought it is the treble tunings for hybrid IEMs and its ability or the lack thereof, is what makes or breaks an IEM presentation. In the RGB we simply get an astounding ability to pick off details with one of the best balanced and extended treble presentations in the industry.

RGB and the new Penon vocal cable. Vocal cable highlights pinna gain. Excellent cable to help with vocal clarity. It is more of a silver plated copper type cable but one that enhances mids. For vocal lovers this cable is for you on just about any IEM.

The use of more ESTs and how Tansio is utilizing all these drivers now presents with the type of treble that is some of the most articulate, airy, supremely defined, timbrally rich, textured and extended better than just about anything I have ever heard. If you're a high end treble fan. You have to seriously take a good look into the RGBs. No question these are my new benchmark for what can be achieved with so many precision drivers in the RGB.

I know some folks do not like the coloration coming from ESTs. EST sheen? EST sparkle is a bit different than BA sparkle and again a bit different than dynamic treble sparkle. I suppose it is less shiny vs emitting a type of sheen, a shine. More ghostly in origin, but there is an undeniable transient and dimensional factor for EST treble that is more than addictive. It is the reason why today's highest end IEMs use EST drivers.

The treble is mostly in line with the rest of the signature and is always in control but is ever so slightly elevated to be at a similar level forward wise to the mids. Tansio has always tuned with a bit of an elevation for the treble portion of its tunings so the RGB here is no different. It does show the bulk of its treble emphasis from around 4-8Khz, its 6 to 8Khz moderate elevation is actually done tastefully with no spikes but also with no dips which adds an ever so slight edge to treble notes. This treble tuning highlights the trebles with a clear defining edge to bring more of a reference level of treble definition. The upper trebles has a gradual drop off that reaches to the skies with a peak at 16khz for a bit of an extended sparkle. The treble here is supremely balanced and definitely brings a high end sound to any track you're listening to. Overall tonal character is clean and accurate vs being bright. Treble control is insanely great parallel to the quality of your tracks.

The treble has so much to do with how we perceive a sound the RGB gives the end user a tunable experience. If you feel the need for more trebles the #3 treble switch adds a slight increase in the trebles by a few dbs. The option is there but for my own personal sensibilities the treble on the off position is better balanced with the rest of the signature.

And then there is its ability to scale immensely to cable changes.

RGB and Effect Audios Code23- This was my absolute favorite combo of the bunch. Suberb dynamics, grander stage, even more holographic than the stock tuning allows.

Cables make a difference for high end IEMs. This is the reason why IEMs like the EE Odin, Oriolus Traillis were made and tuned with premium high end cables that cost $1,300 by themselves. Which would explain why upgrading the cables for these sets is more of a challenge.

The RGB on the other hand was tuned with what is essentially a $50 level silver plated UPOCC cable in any termination you need when ordering. When reading that statement I know that can come off as a negative. But in reality, this is actually a benefit. Especially for cable enthusiasts. Let me explain.

Nothing wrong with this particular cable in fact it is actually a nicely resolving throw in cable at the price point. However I can clearly tell the limitations of the cable pairing just by trying out a few of my higher end cables. Silver plated UPOCC cables in general actually enhance trebles, detail and help with the technical aspects of IEMs they are used for and while the stock cable here does a great job showcasing what the RGB initially sound like. It is because it was tuned with a relatively low cost cable that the RGB here clearly scales for the much better using higher end aftermarket cables.

RGB with ISN Solar - Imaging gets an uplift, richer tonal character, enhancement to stage.

I tested the RGB using some of my best IEM cables and the results brings the RGB into yet another realm in sound. My quick and dirty cable testing clearly proves the RGB scales to better cables.

Cable rolling is highly recommended to get the absolute best out of the RGB. More copper based if you would like some added warmth, meatier textures and an increase in dynamics. More silver based if you want to keep that highly technical refined sound with the widest stage possible. A mix of both if you want all of it.

Standard RGB silver plated UPOCC bottom. Cadmus 8 wire top.

So the standard included cable was what I used for this report but just know the RGB has some immense potential for how you would like to hear them based on my cable testing.

Its excellent refined treble presentation brings a bit of extra to the entirety of the sound.
The RGB has an airiness to the sound like a good open can in the ear. A weightless clean holographic quality to the sound that surrounds what you're hearing. Yet it clearly has a definition in layers that is among the top of its class. This and in conjunction with reference like balanced tuning and the RGB is clearly showing me it is a worthy flagship contender in the ever increasing kilobuck IEM class.

But the RGB is a flagship and flagship IEMs have to have all that makes it a high mark for IEMs. Using 4 high end Knowles mids BAs vs 2 BAs for its mids in the Akiba, its mids presentation clearly lives up to the flagship moniker. It is an all encompassing and fully dimensional type of mids presentation that seems to be difficult to produce without using multiple precision drivers for the region. When I say dimensional. It presents a fully layered airy sound with differing levels and scales of sound with auditory cues coming from the X the Y and the Z axis of your favorite tracks. Again something to the 5 sound bores of the RGB that is contributing to its presentation.

Mids shows supreme dynamic shifts, excellent accurate timbre and world class imaging with a level of holography for IEMs that clearly shows it is a top-level IEM. What has been the hallmark of the Tansio Mirai IEM is their ability to tune with excellent height of sound and we get that with the RGB. I have IEMs with wider stage, I would still describe the RGB as a wide sound stage IEM but where it separates itself from the many is you get so much substance inside that stage that it is sometimes overwhelming in a good way. The height of the sound is a tall as it is deep. The depth of sound is another aspect that is very good on the RGB. The stage aspects will clearly be enhanced with better cable pairings. But the base sound has its foundation based on one of the most spacious airy sounds I have heard for any IEM. I have always loved the tonal character of the Sonion BA vs Knowles BAs. But the 4BAs used for the RGB has to be some of the best I have ever heard. Accurate tonality for the mids are extremely important to me and beyond that it portrays that accuracy in a holographic manor and this is what I meant by the RGB being memorable.

The layering of the mid bands is simply musical immersion. So much space in between your music yet amazingly cohesive. Music clearly sounds out of your head and more based on the venue of the recording. This is where the magic happens my friends and that air continues the sound foundation all the way down to the bass end. It's clearly separated forward mid and back projection of sound brings a complete holographic imaging of the sound that is among the best I have ever heard. Vocals project on a different plane vs the instruments, Inside the instruments the percussion is at a different level than the string section, background vocals are again on a different plane of existence.

Once you hear it, you can’t unhear it. Everything else fails in one capacity or another. The way the RGB dissects the layers is simply remarkable.

The RGB is my new benchmark for technical achievement for IEMs. Its sound separation and its imaging is nothing short of breathtaking. It will produce the sound imaging in space that you had no idea about. This is the reason why they cost so much among the myriad of other reasons why these are flagships. It is the technical aspect of the RGB that is world class and there is something to be said about an IEM that can reproduce the same tracks you have heard over and over again in a new light. That will be the new RGB.

“This sounds like I am right in the recording.”

These are the words of a coworker friend that was the 2nd person in all of the US of A that got to hear the RGB for the very first time. And that in a nutshell describes how the RGB sounds like. Live music sounds like you're in the audience in the front row. A stunning achievement by Tansio Mirai. BA timbre is there but what makes up for it is just how floaty and dreamy the entire sound gets. Each sound layer has something going on and this is this aspect that really separates the RGB from your traditional hybrid IEMs. Its mids have excellent note weight not too heavy or thick and nowhere near thin. It seems to be the goldilocks of presence. Presents a clean neutral overtone but with excellent timbrally accurate precise sound across the board.
Stringed instruments and vocals have always been the forte of the Tansio Mirai IEM and in the RGB. It is simply sublime.

Classical and orchestral scores have so many dynamic shifts and strings that soar into the skies. If this is how classical music was supposed to sound like. Sign me up and I am not a classical music listener. But then it does rock pop and bass genres amazingly well.

Then there is the bass.

Appreciate our good buddy tgx78 for the graph

It isn't the fact that it is utilizing some high end Sonion acupass vented bass BAs, 4 to be exact but more so what they did to extract a bit of extra from these well regarded Sonion bass woofers. The balancing is reference in that there is no part of the sound that encroaches or oversteps another. And I have read all the complaints about BA bass. Yes there are a few shortcomings for BA bass and I get it. You're a purist for bass. Need that full bottom end and textured rumble to really enjoy your music.

Tansio utilized a few tricks to upgrade the bass department. The acupass BAs are vented which shows in the back end of the RGB.

Then they added a fine copper tubing going from the Bass BAs to your ears out the nozzle. This copper tubing presents with a narrowest of bores out of the 5 out the nozzle and this seems to really focus and channel the bass to enhance its ability. Default bass or no bass switch lacks a bit of lower bass emphasis for my own taste which is quickly remedied with the switch on. This adds a nice 3dbs increase for the lowest registers for bass. Does not seem to affect any of the glorious mids so I much prefer the bass switch on vs off. The mids switch was on from the get go so I leave it on as it was tuned with the switch in the on position. Lastly the treble switch is there if you would like a bit more of the world class treble aspect of the RGB.

I have heard plenty of vented bass BAs and the use of similar Sonion bass BAs on numerous sets but there is something to the narrow copper tubing on this one. Bass seems to have an edge on definition and tightness from other sets using similar drivers. In fact the bass end does not struggle at all to keep up with the glorious mids and treble aspects of the RGB tuning. It clearly keeps up with just how defined the entire sound is. Bass texture is enhanced, its decay seems to be more realistic. It sounds surprisingly capable with bass genres that need a bit of extra in the bass for it to sound correct. It isn’t just the extra thump you get with the switch, it is its ability to portray any type of bass in a correct manner. These are to me, some of the best bass I have heard from a vented BA bass. Sure I prefer dynamic bass presentations but when the bass end is this good. I am more than ok with what Tansio has done with the bass end of the RGB as it enhances and compliments the overall sound. It reaches deep and scales amazing with every bass enhanced tune I tried it with. It does a fantastic job of staying away from the hollow bass quality of lesser BA bass sets. Its sub bass rumble is where I feel it could be better but overall the bass end is not missing much if at all. Its ability showing accurate tonal character mixed with speed and tightness brings about a fantastic complimentary bass for a TOTL IEM in the RGB.

In the end, the RGB is a fantastic achievement from Tansio Mirai. We use that descriptor of a holographic sound when describing high end IEMs but the RGB does it on such a euphoric level which ends up being a presentation that leads to pure music addiction. Its airy detailed treble presentation is now my new benchmark for treble tunings on EST based IEMs. It's no longer a matter of can the RGB pick off details. It will do that but way behind your head or forward outside the front of the head or way to the left or the right. If an IEM is measured by just how immersive the sound quality is. Then the RGB here gets a 10/10. The RGB is a clear accomplishment from Tansio and as much as they learn from prior offerings. I can’t imagine what they have in store in the future. This is one up and coming company to look out for as they clearly know what they are doing. It is one of those sounds that will leave you wanting to hear just one more track in the wee hours of the morning while the family is asleep. It is that benchmark IEM that you will compare numerous others to, to find their shortcomings. It is the one IEM that can show you what you have been missing with your other IEMs. It is the one IEM you can sell off all your others and be happy with. It is the one.


I appreciate you reading my mad thoughts about a very nice sounding and accomplished IEM and in case you was wondering why the RGB is called the RGB. That's because it has luminescence lighting bars in the face plate that activate with sunlight or the ultraviolet flashlight it comes with to illuminate the RGB lighting. Brilliant and different from your traditional face plates. This is cool and all but wait till you hear them.
Last edited:
Thanks for the review. They look exceptional.
  • Like
Reactions: Dsnuts
@Abdullah Bin Madhi I don't think Tansio Mirai will stop making more affordable options. The RGB just happens to be their flagship model everyone makes at least one top end IEM that is the RGB for Tansio Mirai. I am 100% certain they will continue making newer IEMs that will be much more affordable. Keep tabs on the Tansio Mirai thread and or Penon web site.
Such a special review........showcasing sonic attributes never before described! I have read it at least three times. Lol
  • Like
Reactions: Dsnuts


There are no comments to display.