ikko OH1 - Reviews
Pros: Affordable.
Build quality.
Good looking unit.
Overall pleasant tonality.
Just a nice affordable sound.
Cons: Cable tangles.
"Case" is a flappy-thingy
Not much else except maybe tough competition at this price?
Ikko OH1($139): An entry into a different realm.

Thanks to Steve from Xtenik Audio for the use of the Ikko. All that was asked was to provide an open honest review. I would have it no other way. And as such, the unit may be returned at any time at the request of Xtenik. And as usual, I am late…apologies.

Xtenik link : https://www.xtenik.com/product/ikko-oh1/

I recently read Pinky’s excellent prose regarding reviewers and the heat generated from those who are, I will put it subtly, jealous. You know, I value his opinion and warrant an agreement with that verbiage processed in his writings. In my humble reviewer opinion, he is second to none with regard to verbiage. One would be wise to listen to his words. I am but a small fry in the ever-increasing world of “reviewers” but what I profess is a true opinion of the unit at hand. I will agree that when one finds a unit, which does not necessarily fit your listening operandi you must work extra hard. There is a certain manufacturer of which I feel this pain. As such, I must try extra hard to discern the likes, lest I make it into a b*tch-fest of disdain. Thankfully that is not the case with the Ikko.

Another acquaintance, @wiljen had the OH1 well before me and espoused its virtues of trying to break the ChiFi mold of bright signatures and multiple drivers. Here, the OH1 uses a “simple” single Knowles BA and a single dynamic driver of 10mm variety. I for one appreciate that simplicity. To me, a company, which goes this direction can focus more on the tuning since there are fewer drivers involved. Think of it as a guitar/piano duet as opposed to an orchestra. I must immediately state that this works. This is a really good unit, with a fairly. Unique look and feel. I like it.


Balanced Armature: Knowles 33518
Dynamic driver: 10mm polymer composite titanium-plated diaphragm dynamic driver
Sensitivity: 106dB

Frequency range: 20-40kHZ

Impedance: 18ohm

Cable length: 1.2m

Connector: 2-pin 0.78mm

Cable type: 4 strands of 8 high-purity oxygen-free copper-plated 5n silver-plated

Gear Used/compared:

BGVP DM6 ($199)
BGVP DMS ($159)
Shanling ME100 ($89)

Shanling M5s
XDuoo x10t ii/iFi xDSD
Dethonray DTR1
Shanling M2x

Songs used:

Too bloody many to list all, but you want songs, so there you go:

Coldplay-All I Can think About Is You
Coldplay-A Message
Coldplay-White Shadows
Dona Onete-Sonos de Adolescente
Los Lonely Boys- Heaven (en Espanol)
twenty one pilots-Trees
twenty one pilots-Car Radio
twenty one pilots-Heathens
Damian Marley-Everybody Wants To Be Somebody
Damian Marley-So A Child May Follow
Damian Marley-The Struggle Discontinues
Ziggy Marley-Lighthouse
Ziggy Marely-See Dem Fake Leaders
Mark Knopfler-Laughs And Jokes And Drinks And Smokes
Santana w/ Mana- Corazon Espinado

The new twenty one pilots album, Trench
Tedeschi Trucks Band
Big Head Todd & The Monsters-Beautiful World
Mark Knopfler-Down The Road Wherever


Coming in a typical white-sleeved box, the Ikko has a thicker than normal cover. Replete with the specs on the back, a simple picture adorns the front. I like it. Pulling the sleeve reveals a black box completed with sublimated Ikko label and logo. A stiff thicker-than-need-be envelope houses the warranty card and quick guide. Not bad. Underneath the envelope lies the IEM well protected on top, and six sets of silicon tips, “vocal” and “balanced.” Under that is a cutout housing the cable and the folding/snapped “case.” Soft but a bit small, the case is kind of refreshing to see, since it easily fits into pockets or the extra pocket of your DAP carrying case.

Overall pretty straight forward, but they at least included a case!


With a right-angled 3.5mm jack the protection is ample for bending and movement. Machine-wound, the cable is square and does not tangle. Nice to have this. An anodized metal splitter, with no cinch strap moves up the cable, leading eventually to the 2-pin cable complete with long over-ear guides. I typically do not like over-ear guides this long due to pinching, but this is a very nice mix of length and suppleness. I found no problem fitting the OH1 to my ear. I also like the blue ano color with the multi-shaped shell. Different, yet tasteful. Another appreciative applause from the crowd.

Using the medium balanced tips, the fit is very good, going deep into the canal, while providing a good seal. I like this. I have a couple of other IEM’s in-house currently and their fit is almost painful. Different shells, and different feel. This is good. I think what helps is that the rear part of the shell, on the inside is thinner, like looking down the hood of an old Triumph TR-8. Clean and shapely. No pressure was felt even with long. Listening sessions.


As per my standard, I listen to check everything out, then place the critter on my Shanling M0 (ooppss…not this time as the Li-Ion battery seems to have quite the “full tummy” so M3s it was) for a minimum of 75hrs. Checking occasionally I found the sound as pleasant as first listen.

Currently listening to Lindsey Stirling through the Shanling M5s and Tidal Premium, I get excellent bass retrieval and depth of sound. Mids are a bit behind the scene, but not lacking on thickness. With rumble on Crystalize the violin sounds simply sumptuous, as the electric bass support gives the bass excellent depth and not overly rotund thickness. I prefer sound on the warmer side of life, so this is turning into a treat.

Sound beyond initial:

Moving on to a more in-depth look, I find the treble to be toned nicely, without too much up top. I fail to hear much sparkle, and do wish for a bit more, but the overall depth of sound more than makes up for it. This is almost luscious, but not syrupy. Thick with strength. I find myself turning the volume up with each song. Song Of The Caged Bird almost throws the lack of treble sparkle to the wind. The electric accompaniment aids in providing a forward sound, which tends to lead the way on this song. Her violin play moving. To the back slightly, like well…a bird in the cage sitting peacefully while you read your paper.

When one considers that the OH1 is the first iteration from Ikko, you begin to wonder why ALL ChiFi companies did not do this to start…

While I find the treble to be a bit polite, I find the mids to be pleasantly semi-robust. Not rich, not polite, but pretty straightforward and a good connection between the treble and rumbly bass. The Knowles is doing its job well by providing good sound stage and the treble/mid combo aid that. Separating of instruments is more fore/aft, than left/right. Not a bad thing, but instruments, which clearly need to be left/right for the music tend to get a bit lost. I do like the separation, so this isn’t a big deal. Transcendence comes through with vibrant color all the way portraying an eagerness of sound, that makes you feel like you are indeed changing with the music. This is a great video, and together the feel of the song is darn near perfect. The OH1 provides the inspiration for your ears in this regard. Follow that with Elements and you come full circle, revived and watching the show with renewed spirit.

The bass is the highlight of this show, though. That 10mm dynamic driver does its job exceedingly well. Rumble not felt. In many more expensive pairings, but without the overwhelming sound one can easily get from lesser tunings. That depth aids in providing a width of overall sound, which counters the separation aspect. There is most definitely some height with the sound stage, at times cathedral-like. But not so overwhelmingly high that one might fear the height. It is enough to provide the basis for instrumentation. I know earlier I mentioned the left/right separation but combine the sound stage and instrumentation and you can feel good about the overall signature. The more I listen, the more I appreciate the tuning. I would call it “energetic.” A lush lilt comes through with Shadows and you get the feeling of watching Stirling dance lightly on her toes throughout the song. Vibrant would be another good term, even with that “polite” tuning up top. A very good tuning of a single BA and single DD.


Ikko OH1 ($139) vs BGVP DM6 ($199):

Not really a fair comparison, as the BGVP is now on its 7th iteration, with much more experience in IEM’s. I have liked all BGVP’s I have tried, and quickly they became one of my favorite ChiFi manufacturers. Just good solid tuning and pleasant sound combined with good to excellent ergonomics.

The difference here is that compared to the OH1, the mids seem pinched and a bit bright. Bass has better control but does not go as deep. There is sparkle up top as well. The mids caused me to turn the sound down compared to the OH1. I will also grant separation is better on the DM6. There is a clarity that the OH1 lacks. That could come down to having more drivers, and different tuning, but the DM6 comes across brighter with a more analytical sound. I like it but prefer the bass leaning OH1 overall. The DM6 just seems a bit bright in comparison.

Ikko OH1 ($139) Simgot EN700 Pro ($145):

An older favorite of mine, the EN700 Pro surprised me with a good overall signature, even if it was tuned more to neutral ears. I found the mids to be good, with vocals supple and supportive of the sound. Bass while not as present but better under control gives the Pro an overall appeal for those who want a more neutral sound, which does not offend. This is a good commuting pair, with good isolation and a design, which does not draw much attention to itself in the all-black variant. It does have a unique “grill” pattern, but I even got used to that. Offering excellent fit, and a very good cable, the EN700 Pro still warms my cockles today. Almost rumbly it is.

I still prefer the OH1 due to that superb bass and a warmer tuning signature. But I would (and will) not kick the Pro out of the house due to the strength’s mentioned above.

Ikko OH1 ($139) vs Moondrop Kanas Pro ($189):

It may seem odd to include something, which costs half again what the OH1 does, but it is worth a look. At the sub-$200 price, I am hard pressed to find a better representation of an excellent all-arounder than the Kanas Pro. Excellent ergonomics, excellent fit, a superb supple cable, which takes on the look of an albino Corn Snake, and there isn’t much to dislike here. With an ergonomic fit, which is very good, it is on the bigger side for average-sized ears. I can listen, but not for the extended sessions that I can with the OH1.

Treble is almost too polite, and lacks the sparkle of say the DM6, but due to my lack of hearing up top, I do not mind. The KP is quite good, and another fine choice for a good middle of the road sound.

Mids are a bit behind the sound, but there is a certain clarity, which brings the unit up to speed. Less bass quantity than the OH1, but better control, the KP is the clear winner with regard to sound quality. But for my tastes, I still prefer the warmer signature of the OH1. Sorry, but it fits my tastes better than the three listed here. It just does.


The Shanling M5s is a favorite source of mine. My open unabashed love for Shanling gives me the ability to critically pick apart any discrepancies. I liken this to a love affair. Once you really love someone, you know their strengths, weaknesses, annoyances, & approvals. The same to me holds in DAP’s or almost anything. Thankfully, the Shanling/OH1 combination is one in which I like very much. That bass coming from the slightly north of neutral sound of the M5s works flawlessly with the OH1, and I get a very good sense of placement. Sound stage is above average, and clarity of the Shanling is quite good. While not on par with my Opus #2, or DTR1; it is still very decent and to me underappreciated. I could (and do) happily live with this combination for everyday listening. Using the combo on my walks and runs became a staple of my use; seamlessly letting me focus on the task at hand. The fit of the OH1 made for a quite enjoyable walk/run. And the Shanling fit into my armband without protest.

The Dethonray DTR1 on the other hand would be one I would most likely not take out on the runs/walks very often (I have since picked up a Shanling M2x for that purpose) but would because the sound is exemplary. The DTR1 still amazes me for pure sound quality. I find it hard to beat at the price (comparable to the M5s), and for pure sound an amazing value. If one can live without the frills, then this very well could be the one. Combined with the OH1, the pair is archetypal of a pair costing several hundred more. This is most definitely due to the DTR1, but many times the IEM cannot scale up with the increase in sound quality. Here it does and does so without fuss. I find myself reaching for the OH1 and another more often as a result. I still savor my TOTL IEM’s, but for everyday use, this is the most prosperous pairing I currently use.

I spent the least amount of time with the XDuoo/iFi combination because the DTR1 was so good. But knowing that for a little bit more the above pairing could be a competent replacement forced the issue. The ability to add bass and go 3D with the xDSD gives one the ability to receive a sound, which is almost the same as balanced, adding that holography, which balanced does. Here it does the same, but is a bit more subtle. I’m not sure if that was a limitation of the OH1 or not, but it did not hinder a sound, which to me was second to the DTR1. To me, the x10t ii is on par (very close) to the DTR, when run singularly through. A competent amp such as the iFi’s I use. Taken in that vein the combination would be an extraordinary example of a portable go-to triumvirate. With the ability to tailor sound more than the others, this would be a commuter’s dream. Excellent battery life, excellent sound, and affordable IEM’s to boot. The sound, which would hover in my ears during that commute would be rich, full of bass and have that added layer of holography, which would fill the volume of commuting choice. Need more mid-presence? Dial in the 3D. Less bass? Turn the xBass off. I found the stack combined very well, and as per my statement above regarding the DTR1 have made the OH1 a regular in that listening cycle.

Coming late to the party was a recently purchased Shanling M2x. Even though I have the M5s, which can stream Tidal and use it for my walk/runs; I am wary of using something so dear to me in case of some “happening.” As a result, the M2x is now my most regular when walking/running due to having what I will call 75% of the M5s sound, at 50% of the price. A very fair trade-off in my book. With less richness, the sound of the M2x is not as “thick” or detailed as the M5s, but that is to be expected. Using one less chip, there is less electronic magicry going on. I did not find myself suffering too much as a result. I found the sound of decently presented vocals, combined with an unobtrusive treble to be quite acceptable and this has quickly moved up my food chain of listening. Plus, to note that the combination can be had for less than the price of either the M5s or DTR1 is astounding. An excellent and affordable pairing for all-around use. I applaud both.


Many have moved on to the OH10 and almost forgotten the OH1. This is a place where, as a slacker-reviewer I can reinvigorate the presence of a very good IEM or other piece of gear. Knowing the quality of sound presented here makes me wonder indeed what the OH10 sounds like (very, very good according to numerous outlets), while still reveling in the OH1. The fit is among the best I have tried. The cable is quite acceptable as well. I love the off-centered look of a shell from the ocean. Interesting stuff. But it is the sound, which keeps me coming back. The bass is taut, present and not overwhelming at all. There is no muddiness or congestion. The mids ring true, with female vocals sounding especially impressive and the treble hits at the right spot for me. Not much sparkle, but no over-exuberance either. It does not hit peakiness. There is the right amount of lift and one, which I can listen to for long sessions without fatigue.

Overall, the OH1 is a very impressive package. One I can highly recommend and not feel bad about doing so. This is a keeper and an entry into the Ikko brand for which I am thankful. There is another brand of which I have heard their “entry” model, and I hold both in the same regard, tops at this point and a bit upward. If these are the entry level models now, I can only. Imagine what the higher models sound like. I will have to find a pair of the OH10 and find out.

Thanks to Steve and Xtenik for the sample Ikko OH1. It is understood that the unit may be asked for at any time but is mine to keep otherwise. This is a really fine unit, and I recommend a listen.

Pros: Well articulated, detailed sound
-Highly natural tonality despite the hybrid drivers
-Comfortable, seamless fit
Cons: Included pouch is too small
-Short nozzles might be an issue for some
IKKO OH1 Meteor Review: Affordable sensation

A fresh-new portable audio brand, IKKO released their first IEM product named OH1 with a rather friendly pricing, marked for $139. Back then when I first stumbled across an article introducing the new brand called IKKO, to be honest, I didn't have much interests or expectations as I thought it was just another Chi-Fi brand. Sometime after that, I've got a chance to give OH1 a try and spoiler alert, I was rather amazed by it.


It's true that IKKO is a new brand and OH1 being their first IKKO product, but this didn't really seem to be their first time producing an IEM. I had doubts about them being newbies and got curious about their background, but couldn't find any detailed information.

I later got to know one of the guys from IKKO and asked for any introductions for their brand. He replied that they had a decent amount of experience doing OEM for other companies, so I suppose that gives us some incites. This all long story can be summarized in one sentence - zero expectations before, full of surprises after. Anyhow, let's get into the review and take a look at the specs and its sound.


OH1 comes in a small, well-packed box. Earphone and the accessories are nicely presented as well. Other than the earpieces, OH1 comes with a stock 3.5mm cable, 3 pairs of vocal eartips, 3 pairs of balanced eartips, a soft pouch, and some paperwork. Nothing particularly eye-catching from the accessories, but comes with all the essentials.

One complaint to address would be the pouch being a bit too small. The earphone does fit in the pouch but feels tight and won't give much protection at all. I'm definitely going to need another case either for better protection or in case I pair these with a custom cable.


Earpieces are made of metal alloy and have a solid build. They feel quite light-weighted and ergonomically shaped. Nozzles are rather on the shorter side but provide a proper seal and comfortable insertion. I much like the comfortable, light fit these provide.

OH1 has a hybrid configuration of 2BA+1DD, housing a Knowles 33518 dual BA for upper frequencies and a 10mm polymer titanium DD for the lows. The earpieces are terminated with non-recessed 0.78mm CIEM 2pins as well as a nozzle diameter of T400-T500.

Cable / Eartip matchings

The included stock cable is made of silver-plated OFC. The color on the connectors matches with the earpiece color, giving a nice universal look. I usually don't expect much on the stock cables from this price range but this one seems to be pretty decent in quality, working well with the sound. Feels very light and flexible, not causing any microphonics.

The stock cable already achieves enough performance and I can see IKKO paid good attention to this. If you're still looking to get a custom cable, I'd suggest copper cables (PW No.5, etc).

For the eartips, the included vocal eartips slightly reduces the lows and bring the mids closer the ears with more air to it. Those who are looking to get more density and hardness on the lows would be better to go for the included balanced eartips.

Though my favorite eartip matching would actually be JVC Spiral Dots. This one seems to be achieving the widest headroom while showing good strength on both lower and upper frequencies and I'd suggest others to try too.

Sound impression: Lows / Overall signature / Soundstage

Ikko OH1 presents a very harmonic and musical sound with a slightly w-shaped signature. Lows approach in a very calm and gentle manner but with a clear and active presentation. Strong groove and extension, however tightly controlled.

It's a very neat presentation and I'm pretty darn impressed to get this quality of bass for the price - and I'm of course saying this considering the price, but this is the type of bass I'd call "premium".

Both textures and reverbs don't feel cheapy and the bass maintain a weighty, virtuous manner. OH1 shows just about the right amount of bass, neither feeing boomy nor lacking. Gives me an impression that IKKO tried to highlight the details from the ultra-low as much as the sub-bass would do.

It also forms a natural, relatively large spreading bass presentation. The soundstage and the wideness are just about mediocre, but not on the lacking side. Though the height and depth are pretty nice, forming more like an oval-shaped headroom.

Sound impression: Mids / Highs / Separation

Mids are pulled a bit forward while keeping intact with the lows. OH1 shows a gradual and natural flow, and while I usually said that expression when mids are nearly in collinear position with the lows, mids here are clearly presented forward than the lows. Vocals have a crispy bite with shiny surface texture. The seamless tonality is another part that I enjoy from OH1.

Yes, there are lots of hybrid IEMs which managed to get natural mids and all that, but if I count in the price, it's quite impressing. The snappy, crunchy bites from the BAs are well backed up with body supplied from the dynamic driver.

Not possible to detect any spikes or sibilance either. The tonality seems to be on-point and shows a stable, airy, and smooth flow throughout the mid-frequency.

Highs show thinner yet even crispier bites with fast and gentle snares. They take a step back from lows/mids and slightly dimmed in brightness but clearly reveal the small treble details and splashes. It's an ideal choice for those who want all those treble details without getting your ears fatigued too easily.

The good air from the mids continues on the highs, so the atmosphere doesn't feel stuffy either. The separation is very nice and manages to analyze the sound into thin layers.


I like the way how IKKO is heading with their products. Everything seems well prepared, from the packaging all the way to the sound. This one will be a reliable and safe choice for those who are looking for a well balanced, w-shaped sound signature.

Now that I know OH1 performs very well for its price, I'm curious to try the new OH10. Glad to see IKKO jumping into the IEM market with a good start and looking forward to seeing what they have to offer us in the future.

Visit www.aboutaudio.org and follow on Instagram / Facebook for exclusive contents!

Thanks to Xtenik for providing OH1 in exchange for an honest impression/feedback.
I am not affiliated with either IKKO or Xtenik and none of my words were modded or asked to be changed.
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Pros: Impactful low-end; superb build; small & light earpieces; comfortable; great allrounder.
Cons: Recessed mids.

You find a series of previously published photos of the Ikko OH1 HERE.


An earphone with a warm, deep-low end oriented, refined, V-shaped sound with treble adjustable according to personal preference.


Ikko is an interesting new Chinese audio company and the OH1 is their first earphone.


Taken from the Ikko website.

You find more information on Ikko Audio’s product page.


In the box are the earpieces, cable, two sets of eartips (narrow-/wide-bores), and a soft, velvety pouch for storage.

One of the most attractive features are the robust, beautifully CNC machined metal earpieces: they are light, ergonomically shaped, feel well between the fingers, and they fit well in my ears without sticking out. Comfortable. For unknown reasons, they feel so well that I love to handle and therefore use them. The braided cable works, it is not the sexiest (reminiscent of Knowledge Zenith cables), but it also not any worse than the one that comes with a Sennheiser at four times the price. A matter of taste.


Provided was a set of “balanced” tips (narrow bores) and one for “vocals” (wide bores). I found the main difference in the treble extension, and used the wide bores for testing as the narrow bores subdued/muffled the high notes quite a bit.

I used the iPhone SE and the included largest vocals (= wide-bore) eartips which yielded the more even, balanced sound for my ears.


JK’s tonal preference and testing practice

The IKKO OH’s sound settles on a warm and robust foundation, with a good extension into the the very-low end. The main slam comes from the very low end together with some rumble. The bass remains reasonably controlled down into the sub-bass and gets only slightly fuzzy towards the very low end, which emphasizes the rumble. Overall, the low end adds a comfortable temperature to the image, which is probably the OH1’s strongest point.


The lower midrange is pushed back somewhat by the bass. Both male and female voices are warm and organic, and by themselves clear but I wished they were a bit thicker/denser, smoother, and more detached from the bass. The combination of low-end and lower midrange works very well for rhythm sections such as in Metallica or Rammstein: the OH1 produce a solid, satisfying wall of sound. The upper midrange/lower treble, while detailed, can get a bit too forward at times. Cymbals in the 7 kHz area are defined nicely. Treble, though well resolving, is rolling off a bit early: good for sensitive ears.

Soundstage is average in width, and it has good height with some depth. Sense of space is good, too. The listener is always close to the stage. Timbre is also good: although the OH1 is a 1+ 1 hybrid, it sounds more like a dynamic driver earphone. Instrument placement is excellent but resolution is only average (owing to the boosted sub-bass).


The IKKO OH1 sport a fuller, warmer and more organic sound than the brighter, holographic, less bassy perceived Simgot EM2. They also have better timbre/natural sound for classical music. The OH1 are warmer, that is less neutral, than the Moondrop Kanas Pro, at least in the mids and treble. Midrange more refined in the MKP and same with treble.


Three differently sounding earphones with similar frequency responses.


These earphones are for the road: they are light — and sturdy to throw in your backpack, comfortable, and the warm, robust low end helps blocking out ambient noise. Although they are not perfect in their technicalities (which earphone is?), they are fun to handle and to listen to. A well-rounded package.


The pair of the OH1 was provided by IKKO for my independent review — and I thank them for that.
This review was originally posted at https://audioreviews.org.

Our generic standard disclaimer

About our measurements

Pros: Good quality build on the shell
A musical and energetic sound signature that can be well-received
Detachable cable
Cons: Treble rolled-off slightly too early
A hard case improve the overall unboxing experience
Chin slider should be implemented on the cable
The nozzle can be too short to create a good isolation
With the release of OH1, IKKO brings a listening experience fit for a audiophile with the simplest approach while keeping the build quality uncompromised.

This review is originally posted on Headphonesty. I bought this pair of IEMs at full retail price. This is not a sponsored post, but an honest review written from a consumer’s point of view. Dollar to performance ratio is included below.

IKKO is a new in-ear monitor (IEM) manufacturer and the IKKO OH1 is their first release. It first caught my attention with its unique “gem-like” appearance.With its eye-catching blue alloy metal housing, the OH1 will bound to catch attention on the street. It could even be the winner of the IEM beauty contest.

However, sound performance will be the main focus for most of the audiophiles. Will the sound quality be compromised due to the focus on the physical appearance? We will find out more in this review!
Instagram 2.jpg

The packaging of OH1 is relatively simple. The logo and the photo of the IEM are printed on a white color sleeve. Due to its minimalistic design, it can be easily spotted when placed on the shelf of any audio shop.
Unbox 1.jpg
A white sleeve with IKKO logo and the photo of the OH1.

Removing the sleeve, there is a black cardboard box with the IKKO logo printed which contains the pair of IEMs and all the accessories.
Unbox 2.jpg
Removing the white sleeve, there is a black cardboard box with IKKO logo printed.

Opening the box, the shiny and metallic faceplate of OH1 will catch your attention immediately. The glossy and metallic surface of the IEMs had me bedazzled. Apart from the IEMs themselves, you’ll also find:
  • 6 pairs of silicone ear tips
  • 3 pairs for balanced sound signature
  • 3 pairs for vocal-focused sound signature
Removing the top layer, you’ll find a soft pouch containing the 0.78mm 2-pin 3.5mm unbalanced cable for the IEMs.
Unbox 3.jpg
Attention-catching OH1 with ear tips make their presentation when the box is opened.

Accessories 1.jpg
Accessories contained in the box.

A closer look on the soft pouch

Technical Specification
  • Sensitivity: 106dB
  • Impedance: 18 Ohms
  • Connector: 0.78mm 2-pin
  • Frequency range: 20 - 40kHz
  • Driver configuration: Single Knowles 33518 balanced armature (BA) driver and single 10mm dynamic driver
The faceplate of the OH1 is very attractive - shiny, metallic and three-dimensional. The blue shells is made of advanced lightweight alloy.

The unique faceplate makes for easy recognition, even from far. This could be the only IEMs in the market who have this type of design.
Close Look 2.jpg
The unique faceplate allows easy recognition.

On top to the shell, you can find the 2-pin connector. The 2-pin connector is protected by a layer of transparent plastic. This increases the overall strength of the connector and boosts the confidence of the users when installing and removing the detachable cable.
The 2-pin connector on OH1.

The nozzle is relatively short as compared to other IEMs. Luckily there is a lip on the nozzle that can hold the ear tips else it would be a huge challenge when performing tips rollings. There is a metal gauge on the nozzle to prevent ear wax from entering the IEMs.
The nozzle is protected by the metal gauge.

For each shell, there is a vent on the inside and another vent on top. These vents are designed for preventing driver flex.

Driver flex is when the driver bends due to the pressure of air against it. Usually, it occurs when you're inserting the IEM into your ear and air in the shell creates pressure to bend the driver.

This design is very common for IEMs that utilized dynamic drivers. Thanks to the two vents, I did not experience any driver flex when wearing these IEMs.
Vent 1.jpg
First vent is located on top of the shell

Vent 2.jpg
Second vent is located in the inner side of the shell

The stock cable provided by IKKO is a 4 core twisted 5N oxygen-free copper (OFC) silver-plated cable. The 0.78mm 2-pins connectors used color to differentiate the side - Red for right and blue for left. There are heat-shrink transparent ear guides that improve the fitting significantly.

However, there is no chin slider on the cable else it would be closed to perfect.

The cable is terminated with a 3.5mm unbalanced right-angled jack. There is a strain relief to increase the durability of the jack. Nicely done on the cable!
Stock cable for OH1.

The right-angled 3.5mm unbalanced jack on the cable.

2 Pin.jpg
2-pin connector on the cable.

Fit and Isolation
The fitting of OH1 is average for me. I would appreciate a deeper insertion. All the stock ear tips provided cannot give me the deep insertion. With Final Audio Type E ear tips installed on OH1, it gives me the best isolation and fitting.

The 2 vents on the shell allow noise to enter even the isolation is good.

I find some noise leakage and affected me quite significantly when I am commuting. Isolation will be compromised when more vents are implemented to reduce the driver flex.
Close Look 3.jpg

The OH1 is not a power-hungry IEM but with sufficient amount of power, it can unleash its potential, especially on the dynamic driver.

While test-driving the OH1, I chose to pair it with Chord Mojo. This assures that OH1 receives sufficient power to perform at its best.
Pairing up OH1 with Chord Mojo

OH1 is a fun sounding IEMs. What do I mean by fun here?

"It is energetic and the musicality produced gives the user a sense of life."

The presentation is slightly smoothened so that it is not too technical and analytical but the details are maintained uncompromised.

The soundstage for OH1 is averagely wide and surprisingly deep. The depth could be caused by the performance of the dynamic driver. This allows OH1 to create an amazing layering over the track and I really love it. The averagely wide soundstage yields an engaging performance of OH1.
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"If every IEMs in the market has a secret weapon, then lows responses will be the secret katana for OH1."

The lows extended deep and create rumble when the bass kicks in. Due to the extension, the bass has a good layering with mids and highs.

The pace of lows for OH1 is considerably fast. It kicks inaccurately and the decay is handled precisely. It is balanced between analytical and warm - giving it an emotional yet detailed body in the lows.

The lows are full-bodied. This can be observed when listening to the saxophone. A lean body in the lows can lead to off tonality in Jazz due to a lack of capability in presenting a natural tone of the saxophone. This is as easy as ABC for OH1 and I love it a lot.
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IKKO OH1 on Chord Mojo

As mentioned earlier, the OH1 is able to produce a musicality that gives the user a sense of life. This sense of life shows in the mids. The vocals are breathy and spacious. With the smooth transition from the lows to the mids, it gives OH1 a lush sounding in the mids. It does not get affected by the lows due to the good layering.

"The vocals are staged slightly behind the lows - this is my favorite staging method."

This makes OH1 a suitable choice for those who listen to pop and hip-hop. It is good for the vocals to be staged slightly backward so that it does not sound shouty which might cause fatigue. It is very well-controlled.
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This is the part where I has a bit of doubt in. The treble rolled off a little too fast for OH1. This makes the overall sounding in the highs a little unnatural. This reminds me of my Campfire Audio Nova which has a similar issue. Fortunately, OH1 treble extension is not as bad as the Campfire Audio Nova but I would appreciate the treble to be extended slightly more so that the overall sounding can be more airy and natural.

"Although the rolling off of the treble troubles me, I still find the OH1 manages other areas pretty well."

There is no congestion in the highs due to the sufficient amount of the air. There is some slight emphasis on the highs that can be peaky for those who have low treble tolerance. I have a good tolerance towards treble so I find it comfortable even after long listening.
IKKO OH1 can even be recognised with its shadow.

The IKKO OH1 is a great choice for beginners that are looking for an audiophile level IEMs. The price can be steep as compared to other Chi-Fi brands in the market such as Tin HiFi and Knowledge-Zeith (KZ). However, the excellent build and sound quality can justify its price tag.

OH1 retails for USD$139. It can be purchased on Amazon. There will be no other color options for OH1.

Here is a new emergence of an IEM manufacturer that poses a threat to other manufacturers. I wish to see more amazing works from IKKO. I’m thankful that there is another good alternative for beginners who wishes to enter the world of audiophiles.
Pros: Build quality, bass performance, solid mids w/ good detail, great clarity and separation, very open
Cons: Carrying case doesn't keep earpieces separated, can be harsh in upper mids, U shape is definitely not a reference tuning.

Disclaimer: I was sent the IKKO OH1 as a review sample by Patrick Lin after having a conversation about IKKO products on facebook. If you have an interest in IKKO products, please visit their website, or facebook. IKKO products can be purchased from Amazon here or purchased from Xtenik here.

Unboxing / Packaging:

The box has a white slip-cover with the ikko logo and earpiece adorning the front and specs on the rear. inside is a black pressboard lift-top box again sporting the Ikko Logo. Immediately under the lid, we find an envelope that contains the warranty card and instructions. Beneath that, the earpieces are revealed in a foam tray at the upper end and the two sets of tips also housed in foam in the lower portion. Beneath the tips hides the soft case with the cable inside it.

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The kit included with the OH1 is fairly thorough, with 6 sets of tips (3 each vocal and balanced in SML), a soft carry case, the instructions and warranty card, and the cable. Overall, for an IEM at this price level, the kit is equal to or better most brands and falls behind only ibasso (hard case) and Fiio (kitchen sink in kit). I would have liked to see the pouch offer a pocket to keep the two earpieces from touching when in transit to prevent scratches.

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Shells are cast aluminum anodized uniformly in a deep royal blue in a teardrop style. Size is medium-large but depth of the shell is thinner than most which helps with getting good insertion and seal from a relatively short nozzle. Unlike most models at this price point, nozzles are part of the inner shell and not a separate piece. I commend Ikko on doing this the harder way as that means more internal and external polishing of some pretty tight spaces to get the anodizing right and the sound channel correct. Nozzles are at the lead edge of the shell with a forward and upward rake and have a pronouned lip. Venting is a single port behind the nozzles on the interior of the shell and one on the upper surface of the shell between the two pin connector and the L/R designation. Both earpieces have the Ikko logo and name along the rear of the shell and are very tastefully done.

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Bass details are handled by a 10mm titanium plated dynamic driver while higher frequencies are handled by the Knowles 33518 balanced armature driver. The 33518 is a newer Knowles driver that is targeted at hearing aids and audio above 1kHz per Knowles. Some will recognize this pairing as being similar to the Fiio FH1 that also uses a 10 mm dynamic coupled to the 33518. The Magaosi also uses the 33518 in a more limited role as the mid driver between 22955 (CI) Bass armature and the 29689 (ED) treble armature. Nominal impedance is listed as 18Ω with a sensitivity of 106dB/mW which makes the OH1 easy to drive using low powered sources like phones and tablets. I did find the OH1 scales well but was more than adequate when used directly from an android phone or iPad.


The cable is well done with all metal accents anodized to match the color of the earpieces and color matching is spot on. the Jack is a 90º style that I prefer with a metal barrel and a black plastic strain relief above it. The cabling itself is a 4 strand silver plated 5n oxygen free copper in a double helix (two wires twisted, then pairs twisted) from jack to splitter. The splitter is also a blue metal barrel with each pair of the helix exiting to the earpieces. Terminations have a pre-formed earhook without memory wire and end with metal cased .78 mm bi-pin connectors. Right is duly marked with a red ring. If there is a complaint here, the bi-pin connector on the iem is raised and the connector on the cable does not have a matching recess which makes the connection look a bit different than most other models. Overall, a well done cable with nice accents to match the earpieces. Now about that matching chin slider? (wish it had one).

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Two sets of tips are provided, one marked vocal and the other marked balanced. Perhaps oddly, I found the vocal tips to be a bit more balanced and used those for the bulk of my listening notes.


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Bass is the star of the show on the OH1 to me. The OH1 has better than average extension at the low end and sub-bass is not only good in quantity, it is also good in quality. Not boomy or loose, but tight, clean, and with better detail than expected. Attack and decay are both better than expected with decay being only slightly slower than attack and still faster than expected for a dynamic driver. In that respect the OH1 combines the best features of dynamic driver bass with the control of BA bass. Sub-bass is foward of mid-bass (a preference for me) but detail and character remain consistent as you climb through the range. Mid-bass shows no bleed into the mids and no bloom at all making this one of the cleanest two driver hybrids I have heard as the point between mid-bass and mids is usually where the hand-off between dynamic and BA takes place and more often than not the point at which coherency falls apart or a perceptible bass bleed is present.


As we move from the bass into the mid-range, the transition is fluid with no major drop-off or large spikes. Mids are slightly behind the bass but not enough to even call it a recess. Tonality is quite good which proves that Ikko has done more to tune the BA driver than the previously mentioned FH1. Vocals show good clarity for both lower registers and upper with a mild push forward of upper-mids that gives female vocals just a touch more presence than lower voiced counterparts. Details are quite good and timbre on vocals is as well. Timbre on upper strings is a bit on the hot side and can come across as slightly brassy at times. Guitar is particularly well rendered with both acoustic and electric sounding lifelike and energetic.


As we climb from the upper-mids into lower treble, we almost immediately plateau and stay put at the same level for most of the treble range. This is in stark contrast to many iems that are a ball of spikes when looking at frequencies above 2kHz. The OH1 does a good job with giving snare enough edge to be credible but not sounding sharp or harsh. Overall, the treble feels quite laid-back and easy to listen to for extended sessions. Clarity is good with a solid level of detail in the lower treble and then as it climbs into the higher ranges, detail and output begin to taper off pretty steeply above about 10kHz. This makes for some air and sparkle while remaining non-fatiguing and polite. The only drawback is as tracks get more complex with lots of treble-heavy parts, the OH1 can get a bit overwhelmed and sounds a bit thick. This isnt a common issue, but something to know is a possibility so if you listen to a lot of treble-intensive works, you may wish to audition before purchase.

Soundstage / Imaging:

Soundstage has good depth (better than expected) and width (as expected) with the balance being slightly in favor of width. While not as 3d as some, there is some sense of height and instrument positioning benefits. I didn't find any congestion to the stage and with width favored no tendency to place instruments behind each other instead of next to each other. Binaural recordings like the Cowboy Junkies trinity session that I enjoy do a good job of showing off the stage and imaging capabilities of the OH1. Overall imaging is class leading and competes well with models significantly above its price point. Spatial cues are well rendered which makes the OH1 good for movie watching and maybe gaming although I am not a big gamer so cant speak directly to that point. Layering is also quite good and I didn't find that it bogged down or thickened as tracks got busier and more complex.


Fiio FH1

With both sharing a 10mm dynamic and the same BA driver this is a natural comparison. With a $75 price difference maybe a bit less so, but lets do it all the same. Both share a similar bass forward tuning with good slam but the OH1 notches the win for better control and depth. Both are good, but OH1 is better. Mids are very similar and again, this is more a matter of degree than difference with a slight edge going to the OH1 for better transition from bass to mids and a bit more energy in the upper mid-range. Treble is again about equal, but here I had trouble picking a clear winner as the two are more similar than not.

Build-wise the OH-1 is the more polished product and both have solid cables. The kit on the FH1 is better due to the addition of the pelican case and 2nd cable for use with a phone.

NiceHCK M6 (DMG Vented filter)

The M6 is a bit brighter and has a sharper edge to its sound than the more relaxed OH1. This makes the OH1 sound more natural while the M6 at times sounds a bit strained and/or clinical and dry. Mids are more forward on the M6 which again is mixed. On some tracks the forward mids helps the M6 feel more engaging with strings in particular, but on others that forward push can result in a more strident tone and some sibilance at times.

Build-wise, both are quite good but quality of anodizing and cable go to the OH1 as the clear winner.

Magaosi X3

Again, I referenced the X3 earlier as sharing the mid-range driver with the OH1 so this is a natural comparison. Bass slam goes to the OH1 without doubt as does low end extension. Both models exhibit very good control of the bass so on that count we will call it a draw. Mids are good on both and very similar but for me strings are a bit better on the X3 where the timbre is a bit more natural. Highs are similar on both as neither has fantastic top end extension but the OH1 sounds less rolled off where the X3 has a lack of air at the high end.

Build-wise, this is quite a clash, the clear acrylic of the X3 with its sound tubes has a lot of appeal, but so does the polish of the OH1. The kit is better on the X3 with its included hard case and bluetooth cable, but at $45 more, those items could be purchased separately for the OH1.

Moondrop Kanas Pro

The Kanas pro is way closer to neutral than the OH1 which has a much more V shaped (nearly U shaped at times) signature. Bass is far more the star of the show with the OH1 than with the KP while mids are fuller on the KP, Treble is a bit more forward on the OH1 which gives the OH1 a bit more air and sparkle than the KP. The KP has a bit more detail especially in the mids and lower treble. Both share a sort of laid-back effortless delivery, but for me the KP is slightly better at it.

Build-wise both are stellar and both cables are equally good. The OH1 does have the advantage of weighing about 1/2 what the KP does so may be more comfortable for long wear.

Thoughts / Conclusion:

First off, my thanks to Patrick and Ikko for sending me the OH1 to try. I found the OH1 to be a great way to launch a new company into the busy audio landscape and it shows a level of capability well beyond what one would expect from an introductory model. From the polished shell to the mature tuning, the OH1 has all the hallmarks of a seasoned product and competes well at its price point. For those who like sub-bass rumble and a polite treble, the OH1 should be on your list to audition. I've been using mine for a solid week as I write this review, and think they will likely retain a spot in my work lineup now that I am done writing. For those times when you just want to relax and listen, they make a great companion.
Pros: Incredible lower bass performance, clear mids, good imaging, deep soundstage, soft and transparent treble, high quality construction, beautifull design, easy to drive, good value
Cons: upper treble roll off, mids take second seat in bassy music, timbre can lack details sometime


SOUND: 8.5/10
DESIGN: 9/10
VALUE: 8.5/10


IKKO is a newcomer in Chi-fi world, and a mysterious one, we don’t know exactly where they came from and what there audio engineer team is, but we can guess it’s from Shenzhen as most of iem companies. One thing sure, the first product they lauch will not stay a mystery.

An hybrid earphones with a high quality 10mm polymer titanium dynamic driver and the use of excellent Knowels 33518 balanced armature make this OH1 stand appart in term of drivers implementation at budget price.

But that’s not all, the built quality too stand appart, with sumptuous blue alloy metal housing sculpted like a precious stone, the OH1 will sure make turns head on the street and win lot of iem beauties contest whatever the price range.


As i’m not that sensible to the look of an earphones but more about its comfort and especially sound rendering, did the OH1 is just a looker without the soul or a real audio enthusiast luxury at a very competitive price?

With a really talented dynamic driver for the low and excellently articulated balanced armature for mids and highs, I can say without a doubt that we have here a very capable and well tuned contender.

I will try to explain in next review the multiple reasons that confirm IKKO company have a promising futur.


PRICE: 140$usd

ikko OH1 1BA + 1 Dynamic Driver 2-Way Hybrid 2Pin 0.78mm Detachable HiFi In-ear Earphone


Lightweight all metal cavity

  • Ergonomic design based on auricle big data

  • Only 6 grams on one side, creating a unique sense of comfort
Dual titanium driver

  • Knowles 33518 supply comfortable high frequency and ultra high frequency

  • 10mm polymer titanium diaphragm dynamic to create the transient and dynamic
High purity OFC silver-plated cable

  • 2-pin 0.78mm detachable design

  • High purity OFC silver-plated cable, both high frequency extension and low frequency strength
Seamless design

  • Quiet and flexible, wide and comfortable

  • Compatible with the sense of hearing of OH1

  • Deep and ethereal special blue

  • Crafted with a Meteorite carved metal shell
Aviation grade alloy acoustic cavity

  • It is made of advanced lightweight alloy to ensure the hardness of the cavity and better control the weight of the earphone. Combined with the acoustic driver design of the dual titanium driver, the internal harmonic resonance distortion is reduced, and the sound is more delicate and natural.
1BA+1DD Hybrid

  • Knowles 33518 balanced armature and 10mm polymer composite titanium-plated diaphragm dynamic such as piano black and white double-key like a heavenly match, so that the sound shows a natural dynamic, low-frequency fullness without loss of elasticity, high-frequency transparent natural, sound delicate and elegant .
Ergonomic wearing design

  • Based on rigorous ergonomic design principles and massive simulation of wearing test data, ikko finally designs the best cavity shape for the ear canal and even the entire auricle, while weighing only 6 grams on one side, making it comfortable to wear and External noise isolation is at the leading level in the industry.

  • Balanced Armature: Knowles 33518

  • Dynamic driver: 10mm polymer composite titanium-plated diaphragm dynamic driver

  • Sensitivity:106dB

  • Frequency range:20-40kHZ

  • Imdepance:18ohm

  • Cable length:1.2m

  • Connector;2-pin 0.78mm

  • Cable type:4 strands of 8 high-purity oxygen-free copper-plated 5n silver-plated

  • ikko OH1 earphone

  • Pouch

  • 6 pairs of slicone Eartip


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UNBOXING is a very delectable experience, wich inaugurate a generous amount of accessories. All here is about quality. The black box show the IKKO OH1 housing like a jewellery presentoir, and just looking at them watered your mouth. Eartips are presented nicely too. And when you pull over this, you discover a nice carrying pouch with a glorious twisted 2pin cable with blue and dark grey color that match perfectly cobalt color housing. Yep, this is the kind of unboxing experience that make you think you invest your money in a wisely choosen product.

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CONSTRUCTION is simply jaw dropping, A+, Faultless. The housing is on the big (and slim) side but have a unique diamond like shape, or more like a quartz flint. In hand, you find yourself polishing the pleasant texture it have. It look rock solid, and should stand test of time easily as im not worry about its physical durability. Only the 2pin plastic connector feel it should be of better quality.
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Twisted 2pin Cable, again, is really nice and the fact that its color fit perfectly the housing is a big plus. I think cable color is blue-grey, and the L shape jack is of extreme quality. Yep, construction of OH1 really stand appart in this price range.

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DESIGN is excellent because even if housing is quite big, its flat as well and fit comfortably my ears. In fact, I feel like wearing precious elegant jewellery for the first time, yep, I feel coquettish walking on the street with my OH1 (no need of stylish high heels then). Sound isolation is above average and sound leakage extremely minimal.



OVERALL impressions is a big wow effect hearing the sub bass control and speed and big applause when you discover how clear and present are the mids. This isn’t your normal bassy earphones and you know something special happen when you begin being immerse by balanced lushness of the muscular musicality and discover how vast and airy is the soundstage. Too good to be true? If your into ultra analytical and neutral approach, perhaps, but if you always find lower bass to be too thin or not enough resolved in term of attack, your in for a very rewarding listen. Thick, agile, well defined bass that I rarely or ever listen, fowards well textured mids that do not create sibilance, and soft natural treble that offer excellent imaging : this is what you get.


SOUNDSIGNATURE is U shape leaning towards W shape because of extra mids fowardness. Emphasis is on lower end and do not bleed on mids bass or lower mids. Mids are slightly dry but sit well on bass and feel very clear. Treble is emphased on low and mids region and isn’t analytical but have good snap to it.

SOUNDSTAGE is average wide, but have good tallnest and deepnest wich enrich spacial articulation.

IMAGING is above average and offer transparent layering that are fowarded to you and unfolding in deep spaciality.

BASS is star of the show here and we do not talk about boomy or uncontroled one, its sure pretty pumped up in sub region but in a very impressive way that give extra definition to bass line and feel full bodied as I rarely heard. SUB line have there own life to them, they are ultra weighty and rich sounding, have excellent attack and tigh decay, this is a WOW effect guarantee that isn’t really thinked for basshead that need big foward slam but more for audio enthusiast that wanna have extra resolution in lower region, but not in a bright way, in a livier and more articulate way. Timbre is quite smooth in fact, all is about weight and presence here, with great tonality but soft timbre, the 20hz to 150hz is the more bumped frequency range, wich help extension and presence of bass but not kick body, still, kick attack needing good mid range, it have great snap to it, and great extension, mid bass is just not as full bodied as lower bass but offer faster attack.

MIDS are pushed foward and have brighter timbre than bass, its well detailed and very extended giving emphased presence and lively presentation. Female vocal particularly shine with these, due to 2khz to 8khz fowardness, and strangely, we barely have any sibilance, so no harsh peaks even if mids range is quite coloured. Male vocal have a little less body due to mid bass roll off, but this cancel any bass bleed as well and help overall clarity and instrument separation of this range. Timbre is rather smooth but more textured than bass and while it isn’t the best for violin or piano attack and grip, resolution compensate the dryness.

TREBLE is on the soft side as it begin to drop before 15khz. It do not struggle to reveal details and even have some extra presence in lower treble that give cripsness to percussion, but this isn’t the type of treble that give sparkling highs or extra rich timbre. Soft, natural and accurate, this is how I hear it and the highs never sound harsh, metallic or agressive, wich is a very refreshing approach for a chi-fi iem. It sound well balanced and transparent, giving extra visibility to numerous sound layers instead of opaque texture that will cause congestion in the sound more fastly. Light and agile, treble do not sound dark, but plucked instrument like classical guitar will perhaps lack brilliance and decay for some, as well, electric guitar will lack teeth.

AMPING isn’t needed for these, as they are very easy to drive and will even perhaps sound too bassy if amped with too powerfull amp or DAP at high gain.


SUB BASS : 9.5/10
MID BASS : 8/10
MIDS : 8/10
TREBLE : 8/10
TIMBRE : 7.5/10
IMAGING: 8.5/10
ATTACK : 7.5/10


VS Alpha & Delta KS3 (150$) :


SOUNDISGNATURE of OH1 is a well done U shape with warm lower mids and bright upper mids and upper treble, while KS3 sound more neutral and mid centric.

BASS of OH1 is more powerfull and impactfull especially in sub department, where the note feel better resolve, thicker and with better controled attack than the struggling sub part of KS3, this give a moe energic approach to IKKO without sacrifiing to much. Mid bass is similar to KS3 but again its more full bodied.

MIDS of OH1 feel slightly artificial in treble and too warmed up in lower mids, wich give more body to low mids and some sibilance and light harshness to upper mids, KS3 again is more balanced with a smooth push in mids that give extra clarity to vocal but do not feel in front row, more well centered in midde, still, OH1 sound more dynamic and energic, giving extra separation to mid section, where KS3 linear approach and soft timbre make it lack in overall attack.

TREBLE of OH1 is quite extended but not always constant, as it colour more ranges than more neutraly balanced KS3, anyway, this give more sparkle and air, wich give more sens of space and layering, and decay and brillance...so, yes, KS3 lack some treble sharpness comapred to OH1.

SOUNDSTAGE is about same widness, but OH1 here feel deeper and airier.

VS FINAL AUDIO E4000 (130$):


SOUNDSTAGE is a little wider with E4000 but feel taller and deeper with OH1.

BASS have way more sub presence and body with OH1, but timbre is less detailed, mid bass is more punchy and fuller sounding with E4000 and again have more detail. Overall bass is more muscular with OH1 while it have more speed, finesse and balance with E4000.

MIDS feel richer and more balanced with E4000, but less airy and spacious, OH1 vocal are more foward and clear but have dryer timbre. OH1 mids are less detailed but feel greatly centered in a more vast soundstage giving them better separation in some region.

TREBLE of both this earphones is roll off in upper region, but I think E4000 can extract more diversity of details and (especially) timbre even if highs are less crips than OH1. Percussion feel more fowards and coloured with the OH1, wich make them less naturaly balanced than E4000.

AMPING isn’t needed for OH1, while its more than suggested for E4000.

Construction of OH1 feel more fancy and is more eye appealing than low profile E4000 one, for price value in term of construction the award go to OH1 without a doubt.

All in all, OH1 give a muscular more bassy and spacious sound while E4000 feel lusher, more punchy and balanced.

VS NiceHCK M6-BGVP DMG (110$) :


Soundstage is more wide and panoramic with M6, but less deep and around your head than OH1.

BASS is less sub emphased with the M6, have more punch and is brighter, lower end have less rumble and extension, OH1 lower end is more controled and resolve than M6.

MIDS are brighter with M6, and have sharper upper mids than can be (very rarely) sibilant, OH1 feel little more recessed in this department but with a more natural and appealing timbre.

TREBLE is more extended with M6, and it crave more micro details, M6 feel analytical compared to more relaxed OH1.

AMPING isn’t needed for both.

CONSTRUCTION is incredible with both, but the stock cable of OH1 is better quality.

All in all, M6 feel like a more energic, analytical and punchy earphones while OH1 feel bassier, airier and more natural sounding.



IKKO will sure put K.O lot of earphones in its price range, and not only for great construction and look, because sound its the number one aspect that impress.

The fact it can give extra life to your favorite bass line will justify you spent more than 100$ on these, but the great low bass articulation and weight isn’t it’s only quality as it feel pretty well balanced as a whole too with its clear mids and mellow treble.

Perhaps if you search bright analytical or very energic sounding earphones, the OH1 isn’t made for you, but if you search for a great all arounder that offer phenomenal bass, clear accurate mids and smooth but agile treble, i’m confident these are among the best you can get.

IKKO is a talented audio company to keep a serious eye one, and they take some risk going into this price range for a first iem model, but this risk will pay in they end when a justified hype will begin.


For more audio reviews and impressions, check my NO BS AUDIOPHILE website!


Pros: excellent bass
airy and spatial presentation
clear mids and excellent voice reproduction
Cons: somewhat compressed treble with hectic music
The IKKO OH1 opens the colourful hustle and bustle of my new category "High-Class" and is therefore the first IEM I can review, which costs over 100€ and the upcoming in-ears in the segment, such as the Moondrop Kanas Pro, or the Accutone Studio 1, have to measure themselves against.


The OH1 may not have such a pompous packaging as the 1More E1010, but it contains everything it needs. A sleek cloth bag, 6 pairs of silicone tips (Balanced and Vocal), where there's not so much difference (the Vocaltips sound a bit more open than the balanced ones) and a decent 4-core cable with MMCX connector. However, this could be a bit more solid and there is unfortunately no remote/micro available as an option.

The OH1 looks a bit like a molar from the side with a diamond relief. They are made of full metal and quite narrow in shape. They sit comfortably, ergonomically and offer a safe hold, at least as far as I am concerned. The two sides are clearly marked with left and right, but I am of the opinion that it is irrelevant for IEMs, because theoretically there is usually only one way to wear them so that it feels right. This is a bit more important for cables, where a coloured marking is used.

The isolation is really good, very good even in the context of passive isolation! With the right tips, you can almost completely isolate yourself from the outside world and also this is not sounded.

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Despite its great appearance, workmanship and wearing comfort, the sound is the heart of the OH1.

The bass is indeed one of the most controlled and detailed I've ever heard. It plays low without rolling off too early and shows an almost linear sound even in the mid bass from the hearing sensation. The sub-bass is more accentuated compared to the higher lows, but this is exactly what I like and appreciate musically. I find the same in the Kanas Pro as well, although the emphasis is even stronger compared to the midbass. However, the OH1 can generate more pressure and in good German it simply smashes more in the bass. The bass is definitely one of the strongest features of the OH1 and presents itself fast, natural and accurate with detailed bass lines. As the name suggests, the dynamic driver also provides the necessary dynamics to guarantee a perfect listening experience for me, which isn't always the case with pure BA configurations, whether or not I have to admit that I wasn't allowed to hear a pure BA configuration permanently in the price range. Here I must fall back on the KZ AS10, or AS06.

Thanks to its finely tuned, fast and precise action, the bass never slips into the midrange. They can unfold their full potential without any problems. Here the BA driver takes over seamlessly and elegantly. The mids are convincing with clarity and bursting with energy. This vitality is what makes the mids stand out in the overall sound image. They are positioned a bit behind the bass and treble in the lower mid-range, but they are more forward in the higher range, which is also one of my preferences. In addition, they resolve really impressively. No matter what you give them, they can reproduce it naturally and true to detail and position it correctly in the room. They are not hard, but soft and harmoniously reproduce the sounds. Nevertheless, the BA driver can be heard here from time to time, which doesn't make the mids appear thin at all, but also not as powerful as some dynamic drivers. Due to the solid body of the lower mids and the rise in the upper range, men and women's voices present themselves with natural sound and typical characteristics.

The highs live in perfect symbiosis with the mids and lows. This means that there are no fatiguing peaks and they still play up and down tirelessly. They don't have the biggest extension, but they sound very natural without being overly analytical and sharp. Maybe too little for some high fanatics, but just right for me. Nevertheless, they have an impressive wealth of details and provide a clear and airy sound.
The OH1 can reveal the smallest details and make them locatable. The highs are just as convincing as the rest and make the OH1 a really round, exciting listening pleasure!
Did I just say tireless? Not quite and that is a small point of criticism. With fast rock music, or generally music with exuberant and multiplied, fast following, treble-heavy parts of instruments/sounds, the BA driver seems somewhat stressed. This means that it doesn't follow quite so playfully anymore and slightly compresses the content around the top. That doesn't mean at all that such music styles are taboo, but you should be aware that you might have to reckon with some compromises. Here, for example, the Kanas Pro (single-DD) presents itself more mature. This is of course a high standard, because many budget IEMs have this problem much stronger, but paying that much money you can be more critical, at least that's my approach.

The OH1 shows no weakness in image and stage. One could wish for a little more depth, but what is happening on a broad scale is already remarkable. Clear separation of instruments, enormous transparency, no feeling of tightness (spatially) and above all no overlapping sound goulash. Great!


With the OH1, IKKO publishes a first work that has a lot to offer. If they can maintain this level and possibly even top it, for example with a 3-way system, which makes the highs appear clean even under high stress, we can be more than excited. The OH1 will increase its popularity without a doubt quickly and rightly and will probably make many audio enthusiasts happy in the future.



More reviews: https://david-hahn.wixsite.com/chi-fiear-eng
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Pros: Class leading Bass performance.
- Clarity and Airyness
- Design and build.
- Smooth FR without any peaks
Cons: There is some glaring in upper treble at complex tracks
Hello, Welcome to another Review!




When I first saw this earphone, i was skeptical, a simple hybrid configuration from an unknown brand… I mean, 10mm titanium DD + Knowles BA 33518, same configuration of FiiO OH1, which is an overly warm earphone going for a little bit cheaper. Not something that hyped me too much.

Well, I can tell you for sure, I was dead wrong. These earphones are solid contenders and huge value for the recommended price of 139$

After hearing a positive thought from the very known and respected reviewer Crinacle. I started to pay attention to them. They didn’t received a lot of talk here in head-fi so I decided to approach IKKO for a review.

And here I am.


About the mysterious and interesting brand: IKKO


Apart from being completely new to scene, they started by having an Amazon distribution, a proper brand image and a website with a brand concept. Interesting, huh?

They refer to themselves as:

“IKKO aims to promote a new concept of “FREE” and high fidelity for music lovers in the context of the rapid development of contemporary digital music. As a new brand, IKKO is committed to bringing the new era of digital life design, concepts into a combination of tireless innovation to bring outstanding audio-visual Experience.”

They seem to aim at a concept, a value. Interesting: Design, internet, digital era. Very occidental approach, what leads me to the conclusion that IKKO have biger plans as a brand with newer launches and products. Let’s keep an eye open.

But what’s important for us is in here: “What I insist on doing is to make IKKO bring you the sensory world to touch the soul of the music experience to become more quality and simple.”

My personal opinion is that with the OH1 they got it. So let’s reach out for the real review.


This earphone is a review unit kindly sented by IKKO themselves in exchange of a honest review of the earphone they sell. There aren't any financial incentive on this review besides the product itself that can and will be kept with me. I personally guarantee to the reader my honest and objective review, where I ‘I’ll try to pass my objective impressions as clear as possible giving the reader the chance to evaluate the product by itself. I particularly INVITE the reader to be as critical as possible on my writing



IKKO WEBSITE: http://www.ikkoaudio.com/

IKKO AMAZON STORE – https://amzn.to/2T42Wzj


Drive Configuration: 1 Balanced Armature (Knowles 33518) + Polymer Composite Titanium-Plated diaphragm Dynamic Driver

Sensitivity: 106db

Impedance: 18ohm

Frequency Response: 20-40khz

Cable length:1.2m

Connector;2-pin 0.78mm

Cable type:4 strands of 8 high-purity oxygen-free copper-plated 5n silver plated


OH1 arrives is a very direct and efficient presentation, it doesn’t wow you, but it doesn’t let you down also.

It comes in a solid black package involved in a slip cover with the logo, model name, and an illustration of the IEM. You are also able to see technical specs, the website and some western certifications, which should de good right?

When you first open you see a nice envelope that carries the warranty card together with wear instructions.

Inside of it you are presented with both IEMs and the two sets of eartips, one of them has a larger opening and it’s suited for vocals, the other has a larger opening and it’s made for be “balanced”. I personally haven’t noticed a big difference in sound with the two and think you should go mainly for the better fit. The tips are ok and definitely not disposable, as it may occur in some IEM’s. I am using stock tips at the moment.

The IKKO comes with a bonus of a very nice velour pouch where the cables are stored and you can store and carry your IEM.

All in all, for the price of 139$ the IKKO has a realistic and good packaging and content.



- Ikko OH1 earphone

- Cable

- 6 pairs of Eartips, 3x Vocals, 3x Balanced

- Storage Bag


Let’s do it in a simple way...

The build? 10 out of 10

The cable? Could be better… 6 out of 10

The fit? Universal, good isolation, but nozzle is too short for the average Ear.

I find the IKKO OH1 one of the nicer looking IEM’s I have ever glanced for. The blue color is glossy, vivid, discrete and well textured. They are very lightweight and have a premium fell with an incredible finish and yet solid build. The metal piece have a professional look and a fine boutique feel at the hand.

There is a small and seamless looking brand name in the shells that give a special touch. The surface is what IKKO calls “meteorite curved metal shell”. In the words of another reviewer, it looks more with a diamond surface finish. Very nice indeed.


They have average isolation, not bad, and not like a semi-custom IEM. I never noticed any driver flex and the IEM have two vents to relieve the pressure of the driver.

Fit is not troublesome but it’s not perfect for me also. I found the nozzle too short, a different angle and deeper insertion would give a more secure fit and less shallow fit for me. Fortunaly i found no real problems with that as the IEM feels safe and clean in my ears, as even with the stock tips the fit is good. The lightness of the shell is specially confortable.


The cable is in the middle of the road. While is not almost perfect like the cable of BGVP DMG, is not the worst like the cable of tehnz p4 pro. Ikko seems be hearing the feedback of us and now the earphone carries a 4 core, grey and braided cable, a lot better than what i saw in the first units. It's flexible, has a good preformed earhook and a nice look. It is a little prone to tangling and a chin slider would be of a good help. It's light too.


My preferences: My perfect signature would be a neutral leaning to a slight U signature. I like correct and upfront mids. A good extension at highs without a great roll-off is wished to. Bass needs to be present but not too emphasized. I prefer sub-bass presence with agility more than exactly a mass hiting my ears. I do not enjoy cold sounding signatures nor a darker presentation. Neutral to warm with a hint of airiness and sparkle at the mid treble would be my thing.

The Good: Honeymoon…

Ikko is a fairly balanced and yet energetic earphone, it is what some people call “the typical asian signature”, done in a perfectly way! The word that catches me up when I am listening to them is “snappy”.

The “meteors” earphone gives a full and agile presentation with the right amounts of energy on every area of the music. Bass notes have some emphasis in the sub bass area, from which it starts to get calmer when it reaches the mid-bass, still above neutral but only the needed amount to drive the body of instruments and give a gentle warm feeling to the acousticts.

By the time we get to the mids it feels like a plateau, stable, till it starts to get closer to upper treble, where the earphone has another emphasized region. This part is what gives the unique feel of OH1: the energy and vibrance of the sound, the airy feeling.

I only reserves compliments because the upper region never leads the earphone to something like a tendency of sibilance or whatsoever. The region is perfectly balanced with the rest of the sound.

Treble is good, giving presence to the lastest harmonics and making the sound feel full and not overall relaxed nor dark. They feel more than adequate even having a natural roll-off that may disappoint the treble heads.

The earphone have it’s fun, resolution and pace done in a responsible and technical way. “fast”, “snappy”, “agile”, is what keeps ringing in my ear when I listen to them.

Major positive points for me are its impressive performance in bass and the airy and snappy feeling of the midrange and upper treble region.

Some may find it sounding thin because of the character of the upper treble transition, it is what gives the detailed feeling, and it is what makes the tonal balance a little thin to some people. It’s a taste i personally like and may suit you, or not.


The negative

Even then, nothing is perfect, the only real drawback I found with them is on some complex tracks, the ones with lots of information and some compression happening in the upper treble area, at the same time. In this situation the only BA present in the earphone seems to deal with a little stress and some glariness can be heard, what happens is that the elements in the area lose some separation and definition. My moondrop Kanas dealt a little better in the same songs: That’s where you’re wrong by The Arctic Monkeys From 2:37 to 2:55 and Tame impala’s “apocalypse dreams from 4:08 to 4:24.

In this scenarios the Knowles driver suffers to maintain the technical level and the earphone suffers a little bit to maintain the three dimensionality and texture in the area. Definitely not a dealbraker, every earphone has a flaw. Especially at 139$. This one have those.


Frequency response measure by @Crinacle, Link to the graph and his impressions: https://bit.ly/2SggUJY

All credit is his.

I am using this graph beacause it is exactly how i feel about this earphone and matches the Official Graph by IKKO here:


Bass performance is what impressed me the most at first sight, it is what stands out the most, just after the clarity and airy feeling of the sound.
The decay is a little bit on the faster side while mantaining the dynamic driver feeling. Exactly what guarantee the details and agility in the dynamics. The sub bass go down low at the same time it isn't overdone and mid bass is perfectly balanced without covering details nor giving too much warmth to the sound. I wonder what it's nicer, the technical aspect of attack and decay, or the tonality. Hard to find...


Mids are a little behind the bass and upper region, The overall sound is upfront, with guitars and other elements popping upon your face. But vocals and the same upfront elements lose some body while having the edge in sparkle and clarity. In the terrible analogy to mid's, i would call this "female vocals focused". There is absolutely no mid bass bleed that i can notice. There is some "thin" feeling to the sound when you compare the mids to a warmer IEM like a Moondrop Kanas, but this is a matter of taste.


This is not a earphone of spikes, the treble is perfectly balanced to the overall sound. It completes the transition from the mids is a smooth and easy way increasing the clarity and airy feeling to the sound. Hi hats are very well audible, much more present than my tehnz p4 pro, that feels almost dark in comparision. The treble doesn't tire me and it has a good "splash". The downside is in complex and busy tracks, where the only BA can't keep up the fast pace of the presentation and lose some definition.




Moondrop Kanas (~150$)

The moondrop Kanas loses in bass performance for me, they seem to be a little slower, even being excellent. Also the overdone Sub Bass makes the bass darker than the better tuned IKKO. Mids are more full-bodied on the Kanas but are a little more recessed in the mix. Upper treble is a little more upfront in the ikko, what gives more sparkle and upfront presentation but with the expense of less definition, three dimensionaloty and poorer imaging in complex tracks. Overall the Ikko sound more livier and technical in the bass while the kanas has an edge in sounding more organic and superior in the upper end, even being less upfront. Construction wise they are both a treat to look at with similar quality cables. Ikko is a lot lighter while Kanas has a better and deeper insertion.

Tehnz p4 pro (~120$)

Bass on p4 pro is very even, they are above neutral with more focus on mid bass but the BA speed makes up for it, overall the p4 pro sounds warmer and darker than IKKO. The ikko feels more agile and clearer because of the lot better treble extension and upper treble response. P4 pro has a spike at around 8K that particularly bothers me. I said Ikko "feels" snappier than p4 pro because in fact the BA drivers on p4 pro are unmatched in terms of detail retrieval, what reveals the faster pace to them. The lack of treble extension makes the p4 pro sounding boxy when you switch, with one more trouble being the 8k peak. Bass and treble are better on Ikko while mids resolution goes without a doubt for p4 pro, being very lush, rich and upfront as no other IEM in my hands.


This is it, looking for a earphone around the price of 130$ dolars? You simply cannot discart the Ikko OH1...
It has a class leading Bass performance, coherent, vivid and upfront mids, and a awesome mid-treble transition with great extension. I personaly think it's a lot for the price.

As a bonus you carry a stellar design that would turn heads of anyone with a good taste, a nice carrying case and a cable that does the job. Ikko is defnitely a player that needs to receive attention from now on.

See you there!
Pros: amazing build quality
fit is nice and easy
relaxed sound with exceptional performance in lower frequencies
no hisses or peaks
Cons: no hard carrying case
less analytical, more relaxed

Ikko OH1: Cobalt Goodness

Vox Sonitus Audio Reviews is not affiliated with ikko Audio in any manner. I do not receive any cash incentives, rewards, or anything from them. This review is my non-biased comprehension and appreciation of the said in ear monitor.

The product we’ll be reading about today is from Ikko Audio Technology, a relatively new company that has started its journey with the ikko Meteor (ikko OH1). Currently, Penon sells them here at 139$. The OH1 is equipped with a Knowles BA and a single dynamic driver, and is a good entry for the midfi range of iems.

About Ikko:

Ikko itself comes from a large Chinese ODM (original design manufacturer), which has created solutions for many well-known brands over the years. Through shareholders with strong operational experience, ikko rose as a company during late 2018

Their philosophy is as stated on their website:

“IKKO aims to promote a new concept of “FREE” and high fidelity for music lovers in the context of the rapid development of contemporary digital music. As a new brand, IKKO is committed to bringing the new era of digital life design concepts into a combination of tireless innovation to bring outstanding audio-visual Experience.

As quoted by Watson from Ikko Audio Technology, “We hope that consumers and partners can bring the best experience of [today’s era]. As mentioned on our official website, we are committed to the close combination of people and the “mobile Internet”, to bring real “free” applicable experience.”

Ikko has, as of writing this review, only released one iem. Ikko’s promise on delivering “free” hifi stems from their deliverance of price to performance ratio, with more products coming soon that will be “quality products”, to be on par or even better than the OH1.

Personal Preferences:

  • Packaging is important. First impressions can last a long time.
  • I do not have a specific genre that I listen to. The songs I listen to differ greatly from billboard tops to old classics, pop, rock, edm, acoustics, alternatives, metal, and all of its sub-genres. I incline listening to metal music, specifically to power metal, death metal, and the likes.
  • I enjoy variety of sound signatures, ranging from bright analytical, balanced with only a slight dip in mids, neutral warm, and neutral bright. I generally lean to neutral-bright sound signature, with a certain degree of analytical sound. I dislike over powering bass, as it is the least enjoyable, for me, in my experience listening to music.
  • I prefer iems over earbuds, earbuds over headphones.

  • Shanling M3s as DAC (PC)
  • Shanling M3s as DAP
  • Zishan Z1 + OPA1692 as DAC (PC and my phone) and dap
  • Zishan Z1 + Muses02 as DAC (PC and my phone) and dap
  • Sony NW-A45
  • iBasso DX120

  • Balanced Armature: Knowles 33518
  • Dynamic driver: 10mm polymer composite titanium-plated diaphragm dynamic driver
  • Sensitivity:106dB
  • Frequency range:20-40kHZ
  • Imdepance:18ohm
  • Cable length:1.2m
  • Connector;2-pin 0.78mm
  • Cable type:4 strands of 8 high-purity oxygen-free copper-plated 5n silver-plated cable

The OH1 comes in a slick, white box that has the iem’s design printed out front. The box feels premium and well built. The product description, specifications written on different languages, and contact information are printed on the back.

Upon sliding the box, the buyer is greeted with a sturdy, well-built, black box, with the ikko logo and name printed up front and their website printed at the sides.

Lifting the cover, the buyer is first greeted with a thick envelope containing a few paper works regarding product information (again), how to assemble, how to wear, and warranty card. The envelope adds somewhat a novelty to the unboxing experience.

Under the envelope is the star of the show; the beautifully designed drivers, together with two sets of silicone eartips.

Under these two partitions is a velvety carrying case that contains the cable wrapped in ikko branded hook and loop fasteners.

In total, the buyer receives the following:

  1. Ikko OH1 drivers
  2. 1.2m cable
  3. 3 sizes of balanced ear tips
  4. 3 sizes of vocal ear tips
  5. Velvet carrying pouch

Ikko punched way above its price bracket in its packaging. The unboxing experience feels premium. They did not cut costs in materials used in packing the OH1, making sure that the iem is presented in an organized manner while maintaining its safety in thick and sturdy boxes.


The 100$ iem price range is pretty much congested. It is truly very hard to standout because there are so many iems that are fairly good in this range. The ikko OH1, however, immediately takes its stand with its outstanding design, coupled with sturdy build quality.

The drivers are fairly large and have this deep blue color to them that, when light hits it, turns to a lighter shade of blue. The faceplate has polygonal etchings that ikko insists to be the surface of a meteor, hence, its name. There is a clear division between the faceplate and the entire body of the drivers. The drivers have clear distinction of right and left as white markings are printed on to the metal shell. Nozzle is fairly stout with excellent grooving so that tips will stay in place. Driver mesh quality also does not look cheap.

The cable is a detachable .78mm two pin with red and blue markings at the male 2 pin end to distinguish between right and left channels. The male 2 pins are cylindrical in shape and are very sturdy. Ear guides are present. They are pre-looped, rather than having memory wire inside them. This is much more preferable, as having memory wire can sometimes be a nuisance to take off or put around the ear.

The cable is made up of 4 core high purity oxygen free copper silver plated material which boasts high frequency extension and low frequency strength. The braiding from the drivers towards the splitter is fine with no observable misfit.

The splitter is aluminum and cylindrical in shape. There is no observable strain relief, nor a chin slider.

The braiding from splitter to the 3.5mm plug is uniform. Its grayish color complements the OH1 very well.

There is a short strain relief that leads toward the L-shaped gold plated 3.5mm TRS plug. The deep blue color is also seen here.

Ikko did not cut costs in making the OH1. The drivers have a premium all metal build. Its stunning design is eye-catching. The deep blue and gray color scheme is very subtle and boasts confidence. The polygonal designs on the faceplate are outstanding. Although ikko did release an earlier version of OH1 that has received negative feedback about its cable having loose braiding, ikko responded with a newer version that has uniform build.

Fit and Comfort:

I have had a hard time trying to fit large drivers inside my ear, even though my ears are faily large. Despite the OH1 having large housings, they fit surprisingly very comfortably. The OH1 sits in the concha and the cavity between the tragus and antitragus with ease. The tail end of the iem does not bother me at all, as it fits in a perfect position.


Isolation on the OH1 is great, though they are not the best in isolation. The vocal eartips feel much more airy and loose compared to the balanced eartips. They do block out much of the noise but I wouldn’t use a 100$ iem for commute.


Tips of choice: I used the included vocal eartips, as these sounded more open and detailed than the balanced eartips

Ikko stayed true to its promise of delivering extremely pleasing sound signature at an entry midfi price range. Its sound is natural, with more emphasis on the lows. Though the bass is very powerful, it does not eat away the upper frequencies. The Knowles balanced armature does a great job of presenting vocals and instruments without letting itself drown from the dynamic driver’s low end deliverance, nor sounding sibilant and sharp.

Bass –

This iem is a basshead’s delight. The performance of this iem in the low end is phenomenal. Sub bass is adequately strong and full bodied. Mid bass has that necessary thump to give energetic songs something to sit on. Upper bass has tone and is well textured.

Even though the iem has much subbass and midbass, they do not sound muddy at all. The bass plays more up front than highs, but they do not affect clarity and vibrancy. Ikko tuned the low ends very well to complement the higher frequencies

Mids –

Vocals sound natural and smooth. There is little coloration to its presentation. There is no emphasis on either male or female vocals. Sivert Hoyem’s voice in Blown Away goes deep and does not sound colored, while Anne Bisson’s voice in Dry My Tears sound sweet, with no audible sharp peaks in “s” or “t” sounds.

Instruments are also presented in a natural manner. There is no peak or emphasis, unlike other BA drivers that I have tested. Aja by Steely Dan plays very smooth and relaxing. The subtle palm mute can still be heard amidst the lot of instruments playing along the chorus.

The Knowles BA does an excellent job of being able to present the mids in a natural manner with no sibilance.

Highs –

Highs extend very well and have great resolution to them, though they are a lot more laid back than the lows and mids. Cymbals have quick decay. Piano keys in this region sound natural. Energetic music doesn’t sound fatiguing because the highs are more relaxed.

Clearly, the OH1 wasn’t made for analytical listening. It has easy-going highs that are less emphasized but extends very well.

Soundstage –

There is more width than depth to the OH1’s soundstage. Horizontal clearance is wide, while vertical clearance is a little bit shallow. Enya’s Orinoco Flowsounds excellent as there are no observable congestion, even though the song is very wide and busy with instruments and vocals overlapping each other.

Imaging –

In Yosi Horikawa’s Letter, every pencil stroke can be felt, as with every page being flipped. Even IV Of Spade’s CLAPCLAPCLAP shows how accurate OH1’s imaging is, with every clap being distinct from each other.


Even though there are a lot of iems in the 100$ price point, the OH1 can stand out from the rest. This iem is excellent. It has it all; premium packaging, superior build quality, aesthetically pleasing design, amazing fit and comfort, neutrally relaxed tuning. The OH1 is a new entry level midfi that punches way above its price point.

The ikko OH1 is definitely worth more than its price. As an underdog company, ikko did very well in the OH1’s tuning. Their concept of “free hifi” really shines on the OH1.
Pros: Great quality of the mid zone, of enormous richness.
- Transparency, detail, separation and clarity.
- Ergonomics, comfort and fit, minimum weight.
- Deep sub-bass.
Cons: The cables that reach the capsules appear thin and fragile.
- Lack of greater presence in the bass, from the mid bass onwards.
- Minimal accessories.

The OH1 are IEMs manufactured by Ikko, a brand based in China, totally unknown and new to me. Looking for information about it I found that it is a recent brand, which has only one product, the OH1, although they say they have quite a lot of experience. My interpretation of their philosophy is that they try to integrate their products in the current digital era, through their particular conception of design, trying to maximize sound quality to offer the best musical experience.

Ikko OH1 01_.jpg


· Type of Drivers: 1 DD + 1 BA.
· 1 Dynamic Driver 10mm polymer composite titanium-plated diaphragm.
· 1 Balanced Armature Knowles 33518.
· Frequency Response: 20-40kHz
· Sensitivity: 106dB
· Impedance: 18 Ω
· Cable length: 1.2m
· Jack connector: 3.5mm angled
· Capsule connection type: 2 pin 0.78mm
· Cable type: 4 strands of 8 high-purity oxygen free copper-plated 5n silver-plated
· Weight: 6 grams per capsule

Ikko OH1 02_.jpg


The OH1 come in a box of dimensions 158*88*49mm. It is completely matt black, with the brand logo inscribed in the centre, in a darker, smoother and shinier black. On the back there is a white sticker with the model name and specifications in Chinese and English.

Ikko OH1 03_.jpg

Inside it is found:

· A black cardboard envelope containing the user's manual and the warranty card.
· The capsules embedded in a hard foam mould.
· The cable, located inside a soft foam mould, under the capsules. It is wrapped up with a velcro tape, which is attached to the cable itself. The 3.5mm Jack connector is protected by a translucent plastic cover.
· A black cardboard box with the logo on the front, inside which is a velvet simile bag, where you can find a blister with three pairs of tips translucent white silicone, whose core is blue, SML sizes. There is a small bag with two more tips, medium size and dark color.

Although the presentation is soberly elegant, the content is the minimum required. The carrying bag is soft and offers little protection. Only 4 pairs of tips come from a single material, silicone.

Ikko OH1 04_.jpg

Construction and design

As stated in the features, Ikko use an aviation grade alloy acoustic cavity, to reduce the internal harmonic resonance distortion to offer a sound more delicate and natural.

Ikko OH1 05_.jpg

The front shape of the capsule reminds me of the African continent, but somewhat narrower at the bottom. The surface of the capsule has dents of questionable taste. The inside, however, is completely smooth and ergonomically rounded. The capsules are not thick. The nozzles are made of the same material and have a metal filter. Their length seems longer than it really is. The diameter is 6mm.

For the connection a transparent plastic insert is mounted to protect the two holes, both gold-plated.

The cable has 4 fine strands, covered with rugged plastic. It is quite flexible and the memory effect is low. The connector is in L, of mixed material, plastic in the elbow, metallic next to the plug, of the same color that the capsules.

The splitter is a metal cylinder, also of the same colour as the capsules. The connectors follow the same line, metallic and of the same colour, with a blue or red ring to distinguish the side. The two gold-plated pins are also finished in another plastic insert, very similar to those protecting the capsule connections. The cable close to the connectors is protected by a semi-rigid plastic sheath, shaped to facilitate its use on the ear.

Ikko OH1 06_.jpg

The cable is simply good, not microphonic or very thick. It's easy to handle. But the strands that start from the splitter to the capsules, two on each side, give a fragile appearance, because they look fine and delicate. The ear hooks are fixed, they cannot be molded. There is no ring to adjust the cable under the chin.

In my opinion the cable, as a whole and finished, is of inferior quality than others that can be found in products of similar price.

The capsules, in spite of the particular finish on the front, have been designed to offer the highest degree of fit, isolation and comfort. They are very light, weighing only 6 grams each, despite the fact that they are metallic. The material used gives them a strong sensation of durability, as well as their finishes and connections.

Adjustment and ergonomics

The fit is very good, although the size of the nozzles does not allow deep insertion, but rather superficial. Although it would have improved if they were a little thinner and longer. In this case, the search for the right tips to achieve the best fit is the key. Once the optimal fit is achieved, movement is minimal and no readjustment is required due to its ergonomic shape. As there is no movement the sound is not modified, this makes them very suitable for use in everyday life, in addition to its lightness.

Ikko OH1 07_.jpg



The sound is balanced, with some emphasis on the sub bass, but with more presence of the mid zone and low treble.


The sub-bass is quite linear and compact, it has a good presence compared to the rest of the area. This particularity gives the lows a generous feeling of depth. However, the rest of the bass has no great punch and are very neutral, far from satisfying bass-heads.

Thanks to the sub bass, the bass is not anemic at all and its texture denotes quality and naturalness. Also, the area has great control and articulation, being the speed and recovery quite good.

The notes of the lows are tight and fine, have very good definition and detail, never meddle in the mids.

From my point of view, declared bass lover, as a whole, the body offered is somewhat limited, as well as its global impact, compared above all with the mids. But for those who prefer balanced profiles, this area could be catalogued as very good, since, except for presence and punch, the rest are virtues.

Actually I have something that pushes me to keep talking about the lower zone of the OH1, it's like a love-hate relationship. I have tried to describe this zone previously in an objective way, starting from my own subjectivity. Something that is really condemned to failure in itself, as well as expressing an opinion about sound. But the idea is to try to isolate the lower zone from the rest of the sound spectrum. And this is easy, and that's where I have to properly ponder the bass of the OH1s, that's where the love relationship is born: the deep sub-bass dawns, the dry blow and content of the lower middle, the precise vanishing of the upper low towards the mids... But the hatred appears when the mids pass the hand in front of it...

Ikko OH1 08_.jpg


Clearly this area is the most prominent of all sound. The mids are completely luminous, not brilliant. They enjoy great clarity and are placed above the bass in the presence. The cleanliness with which they are executed is remarkable and the resolution is great. The precision is equally impressive, as is the level of detail. But my feeling is that they show more natural than shamelessly analytical, because the micro detail is revealed moderately. Even so, the mids do not have that point of sweetness offered by other IEMs, but have a hint of coldness. The notes are fine but not sharp, but the origin of a very well tuned BA is noticeable. Technology and design seem to play a fundamental role in this sense, getting the best out of it. But it doesn't stop sounding like BA, a good BA, but BA after all. And this translates into what has been said, a millimetric sound that is lacking in passion and musicality. Bad? Of course not, it's another kind of pleasure or like acupuncture needles, which are inserted to heal.

The section on high mids and wheezing deserves extra mention: extra, above all, for control. The wheezing has passed, with a note, the cotton test. And never better said, something else must have been used to keep a prominent area like this stocking at bay.

Ikko OH1 09_.jpg


The reason for this is the treble or the BA, more focused than extensive in very highs, but I do not blame him, I rather thank him. And the descent in the presence of this area can be appreciated above 5kHz, as if it were an aluminium staircase, with very narrow and infinite steps, precise and delicate, which are not soft but neither sharp nor metallic.

Ikko OH1 10_.jpg

Soundstage, separation

Let's start with the separation: ultra, mega, hyper...? No. Let's go to the other topic: the sound is crystalline, the separation is obvious due to the thinness of the notes, the transparency is appreciated with the naked eye. But the air does not expand the scene as one might expect, it gives it depth but not so much width. Nor does it enjoy a very evident three-dimensional stage, despite the high dose of transparency. The positioning is good and detailed, but I miss something more dynamic or depth that finally widens the scene.


Fiio FH1

Both the Fiio FH1 and the Ikko OH1 share the same Knowles 33518 BA driver, but the difference in profile between the two is abysmal. The FH1 have a bass and dark profile, with a very evident and thick bass, The mids are recessed in relation to its low area, in addition to having quite little brightness, definition, detail and air. The difference between the mids of both are night (FH1) and day (OH1), is so great, it seems to lie that they share the same BA.

Ikko OH1 11_.jpg

BQEYZ KB100 (Bass mod)

The KB100 are a triple driver (2 DD + 1 BA) of 50$, whose profile could be reminiscent of the OH1. After applying the Bass Mod to the KB100, the presence of the lower zone is shot against that of the OH1, offering greater presence and body, generating something more dynamic and fun. But again, the sub-bass of the OH1 is there to offer that differential point that the KB100 cannot counteract, at the level of depth and execution of the zone. Regardless of the level of presence of both, the lower zone of the OH1 is shown to be richer in nuances and texture, definition and control.

However, the big difference is still in the mid zone. The voices are presented in a closer plane and stellar, in the OH1. In KB100, voices sound warmer, but do not enjoy the resolution and level of detail offered by OH1, air, definition, luminosity ... The big difference in price is clearly noticed here, the qualitative leap to sound level is based on the sub bass and quality in the execution of the low zone, in the mids in general and in the treble too, because they have better definition, a more active and precise presence, especially in the low treble, where they extend clearly more.

But the difference is not only in the sound, but also in the comfort and ergonomics of the OH1, offering a more optimal and pleasant fit.

As a clear plus point, KB100s are easier to move than OH1.

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Dunu DN-1000

The classic DN-1000, triple drivers that do not need any presentation, use BA drivers also from Knowles.

The first thing that is noticed is the difference of profile, more in V in the DN-1000, more balanced in the OH1. The sinking in the central zone of the mid to high frequencies is accused in the Dunu, offering a dark sound comparatively speaking, lacking in resolution, nuances and details. There is a feeling of musical loss in that area, something that the DN-1000 do not offer, is demonstrated with all luxury of details in the OH1. From this derives a sense of openness, greater scene and separation that is not appreciated in the Dunu.

But if there is one thing I have to emphasize about the DN-1000, it is its low zone, sub bass included, since it offers a global power that the OH1 cannot compete, in spite of its great quality.

Ikko OH1 17_.jpg

Anew U1

The Anew U1 are clear competitors of the OH1 in their price range. But really the decision to buy one or the other is not based on its quality, but on its features: If you are looking for a V-sound with powerful bass, warm and detailed mids, although somewhat distant, with some good treble presence, but under control, you would choose the U1. If on the contrary one seeks a more balanced sound, with mids with greater resolution, presence and richness, as well as greater extension in highs, would buy the OH1.

At scene level, despite the great separation offered by the OH1, is wider in the U1, I have a feeling of greater expansion with them, perhaps due to the greater extension offered by the lower U1.

In ergonomics and adjustment the OH1 are better, fitting in a firmer and safer way than the U1.

As for the cable, the U1 comes with a cable that I love, at the height of the beauty of the capsules. Meanwhile, the OH1 bring a more conventional cable, where the most remarkable are the connections, apart from its great flexibility.

In short, both IEMs could be easily complementary, having both it would be easy to use one or the other depending on the musical genre to reproduce, in order to maximize the qualities of each one.

Ikko OH1 18_.jpg


I've needed more brain training time with Ikko OH1 than hours of burning. After enjoying other more visceral profiles, the OH1 require a listening that demands pause and detailed analysis. Concentration to enjoy the bass, to assimilate that its quality is not in quantity or exuberance, but in its depth and other intangibles that we audiophiles appreciate, or begin to appreciate, thanks to IEMs like these. However, the mids do not require anything of that, because their virtues are instantly perceived. Just like that clearly analytical character with a great deal of transparency, detail and refinement.

The Ikko Oh1 are a clear difference, a valuable alternative to de-numb the ears and train them for an exercise of precision and micro beauty.

Ikko OH1 19_.jpg

Sources used during the analysis

· Burson Playmate
· F.Audio S1
· Sabaj Da3

Ikko OH1 24_.jpg

Purchase link


Link to the Store


You can read my full review in spanish here:

Excellent review. Thanks
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Pros: good bass, good midbass, great instrument separation and soundstage, accurate tuning, fairly neutral, balanced
Cons: some harsh notes might show up in upper midrange
Getting back to our favorite concern — whenever there is a new player on highly competitve market of IEMs, its initial product would probably be a win due to the will and efforts in aquiring some market share and drawing the attention of the target audience. iKKO brand is not an exception. After spending several days with their first hybrid IEMs — OH1 — we can conclude that it is a great example to support our statement. In this review we would explain what makes us think this way.

iKKO Audio Technology (SZ) Co.,LTD is located in Shenzhen, Guangdong, China. As far as we understand it has been established recently, just some time prior to releasing their first product. iKKO slogan is «Free HiFi» which really resembles price to performance ratio of OH1 IEMs. Hopefully, their following products would possess the same qualities.

iKKO OH1 technical specifications:
  • Type: hybrid, 1x Knowles 33518 BA + 1x DD
  • Dynamic driver: 10mm polymer composite titanium-plated diaphragm, double magnetic circuit
  • Sensitivity: 106dB
  • Frequency range: 20-40kHz
  • Imdepance: 18Ω
  • Cable length: 1.2m
  • IEMs connector: 2-pin 0.78mm
  • Cable: OFC, silver-plated
  • Jack: 3.5mm, gold-plated, L-shaped
  • Weight: 12g (6g per channel)


It is good that iKKO jumped straight into relationships with Knowles by incorporating its BA driver (also found in FiiO FH1 for example) instead of experimenting with «noname» or less professional vendors. This already adds much of the potential for the further adequate tuning especially in case if engineers from iKKO are good enough to disclose it. Moreover, OH1 uses a large diameter titanium-plated dynamic driver as a supplementary to BA in order to deliver balanced sound throughout the entire frequency range.

Packaging and box contents:

iKKO has chosen the common approach to packaging — strict black matt box with glossy black logo imprint at the front, company infromation at the back and white sticker describing the product inside.

Seems that this box was developed before iKKO team even realized which product would be enclosed — this explains why OH1 technical specifications and picture are placed on a separate white sticker… Box contents are:
  • OH1 IEMs
  • cable
  • 3 pairs of white|blue silicone eartips (S|M|L) + 1 pair of black silicone eartips (M)
  • soft pouch
  • warranty card and short product description leaflet

IEMs rest on a soft foamy podium and the cable is placed underneath in its dedicated compartment. One extra box for eartips and soft pouch.

Design and materials:

One of the best characteristics of OH1 IEMs is its stunning design. Aluminum top cover consists of numerous polygons, each having a specific angle and curvature, forcing the base color to change from cyan to deep blue.

This reminds us more of a diamond cuts rather than meteorite surface which iKKO insists on. Anyway, lots of efforts from the team and CNC machine extra time to create such impression…

IEMs base has same color and aligned precisely with the top part.

Output nozzles are protruding from bases and covered with aluminum filter grills. There are two compensation openings: one at the top part of the base and another on the inner part, close to the output nozzle. Channel indicators are located at the top part as well and there is iKKO brand logo printed on the back edge.

We love the style of cable connectors which are made of transparent plastic. Tight fit, no free play.

OH1 cable seems to catch up in terms of both — the overall design and technical characteristics.

It is OFC, silver-plated, braided, with transparent and naturally curved earguides. Features aluminum housing, 0.78mm IEM connectors with channel indicators (blue for Left and red for Right), aluminum Y-splitter, 3.5mm, L-shaped, gold-plated audio jack with a combination of aluminum + plastic housing. All joints seem to be durable but even if you’d manage to tear it apart — it is exchangeable.

OH1 fit is nice, very comfortable to wear for a long time, no pain or discomfort, very natural feel. iKKO claims that the shape was developed using some big data collected during their prior research… We tend to believe that after spending 3 days of continuous listening and having no physical issues.

Audio quality:

Tested with: Hidizs AP80 (neutral sounding DAP), Hidizs AP200 (neutral sounding DAP)

Lows and midbass:

OH1 show very good extension and resolution of the lower range. Deep bass presence is adequate, clear, not overemphasized and definitely not distructing for other ranges. It is capable not only of creating a good sound but also sending some shivers to your nape beyond hearing ability. Bass textures are evident, disclosing additional details in this range. We would definitely give OH1 IEMs five stars for such extended and gentle approach towards lower end tuning together with its capabilities to deliver full-bodied bass, all mixed at good proportion.

Midbass is another virtue of OH1. It has very good articulation and speed together with necessary volume and air to reproduce drum sections naturally. It tends to exhibit a bit more bright details compared to fully dynamic IEMs with similar midbass perfromance but it never reaches the extremes and not producing any piercing sounds. Seems that 10mm dynamic driver in combination with good design of shell cavities do the job of delivering midbass and lows perfectly. Engaging and powerful sound in this section.

Mids and vocals:

This is where BA driver steps in but in contrary to other IEMs with more neglect tuning OH1 do not suffer from excessive sharpness or overly bright tonality. Mids are neither recessed nor elevated, all instruments and vocals seem to stand in one line. Voices have a good clarity, feel natural, perceived as placed a bit to the front no matter whether belonging to male of female singer. No lisping, no thin sound effect. Resolution on voices and leading instruments is more than average but as already mentioned — not harsh or excessively sharp. BA influence on sound is obvious whilst the tuning is on the softer and gentle side. The only issue we have spotted in this section after switching from very capable pure dynamic IEMs was very rare harsh peaking sounds on female vocals… But the more we’ve listened and got used to OH1 IEMs the less impact it made. Perhaps, this was our own susceptibility to upper mids…


Again, the choice of good BA driver and providing further adequate tuning would evetually result in pleasing performance on treble instead of just having shouting and crisp sounds common for IEMs from less responsible brands. OH1 with its airy, gentle and soft treble reminds us about Kinera IDUN featuring the same approach towards the higher end: mixing in BA driver so that it would not influence the overall tonality but would rather extend the resolution and balance the other frequencies. Kind of safe tuning that would keep IEMs fairly neutral and detailed at the same time… Therefore, OH1 treble has good extension and clarity, not overemphasized, doesn’t create a specific signature. We would say that it is even a bit recessed instead. Don’t get us wrong — it is in good proportion with other ranges — it is just a note for BA fans who love excessively bright and cool sound.

Soundstage and instrument separation:

We are surprised with iKKO OH1 decent instrument separation and soundstage capabilities. Tracks that would usually sound flat suddenly started to exhibit more contouring of some instruments. Moreover, we have discovered new afterglows that would shift on vertical or horizontal planes crating 3-dimentional effect. Kind of new experince… Binaural recordings show more than average distance between instruments which would result in larger depth and width of the stage.

iKKO OH1 sound in overall:

iKKO OH1 sound can be described as fairly neutral, balanced, with no evident coloration of the tonality, great extension of lows, good extension of treble, full-bodied midbass with natural mids. Resolution across the entire frequency range is more than average. The only sharp sounds might show up on upper mids but this would be very subjective. Soundstage and instrument separation are surprisingly good.

Compared to Kinera IDUN:

Kinera IDUN is another good representative of hybrid IEMs. We would say that IDUN have more resolution on treble and mids but less extention on lows and less powerful midbass. It also has a bit cooler and brighter sound in comparison to OH1. IDUN is a clear winner in terms of fit and wearing comfort due to its custom-like shape.

By the way, Kinera IDUN Deluxe Limited is upcoming… The new version is addressing the lack of subbass and midbass extension and presence. Fingers crossed — IDUN Deluxe might show up as the best option available in this price range!

Compared to Anew U1:

Anew U1 IEMs are based on single dynamic driver and have slightly better extension and texturing on lows, even more engaging midbass, but less resolution and presence of treble. Completely free of any sharp sounds in mids, though. And the sound is a little bit warmer in overall. OH1 is a great competitor, balancing lower extension of bass by a better delivery of treble and enlarged soundstage.


The fact that iKKO OH1 are direclty compared to and can compete on par or even surpass our favorite IEMs (Anew U1 is our best and Kinera IDUN is our second best) is deserving our highest concern by itself. Some pros and cons stated in those comparisons but we already understood that iKKO has done a great job and introduced new option to consider. They have placed OH1 among the most demanded products in the most popular budget. What really maters, is that in terms of sound quality iKKO OH1 really deserves such placement instead of just exhibiting similar pricing. We are highly impressed with iKKO OH1 and would definitely recommend to consider those among other neutral and balanced IEMs in this price range.

You can purchase iKKO OH1 at PenonAudio store
Bob Diamond
Bob Diamond
Just got it few hours ago. First impression was awesome!! Thanks for the review boss!!
Good review, I'm considering getting it.
Can you please talk a bit about isolation in noisy environments for example while commuting (riding the train/subway/bus etc.) - in this regard that front vent looks worrisome.
Thanks and keep it up.
They isolates quite good, most hybrids I have tried had weak isolation, these do not. I can not hear my wife yell at me, wonderfull...lol
It is important to me that the isolation is good and these are good in that regard, they are very close to q-JAYS and ETYs, which in my book is pretty awesome, they isolates more than SE ref5 and they are custumfitted, throw some complys on the Ikko and they will do the job for you.