Cons: Doesn't take EQ quite as well as others, especially in the bass
Eartip selection might be lacking for some
Simgot SuperMix 4
If you don't like reading, here's is the video version of this review Disclaimer
Once again, many thanks to Simgot who offered me a SuperMix 4 review unit.
All they asked for in return was that I share my opinions.
Intro
The SuperMix 4 is one of the more interesting things I’ve ever reviewed and heard.
It has a mix of 4 different transducer types in one housing:
• A dynamic driver for bass
• a balanced armature for mids
• and finally for treble is a planar and piezoelectric driver.
Intuitively, I thought the planar would be for the mids, and the BA for the upper mids and low treble, so it’s interesting to see my expectations being subverted by what I believe is one of Simgot’s most mature products.
Build, Design & Ergonomics
The accessories list is exactly what we’ve come to expect from Simgot.
A set of 3 silicone tips, a simple carry case, which I’m happy to see has gold accents matching the gold accent on the IEMs themselves, and a cable with hardware matching the IEM surface finish.
So far I’m getting a more grown up vibe compared to their slightly cheaper offerings, and something more serious than the higher end and flamboyant EA1000’s.
The IEM shape also seems to be getting more serious, with a more ergonomic design albeit with very rounded edges compared to the more curvy models like the Kiwi Ears KE4 and other similar shaped IEMs.
The SuperMix 4’s shells and nozzles are a single 3D printed resin form, ending with 3 ports, which as far as I’m concerned is a good sign that more effort went into the tuning of the drivers.
In my experience, there does seem to be some correlation there.
It might be silly, but I also really appreciate the extra effort that went into all the small things such as the model name being printed on the side of the shells, the micro-machined parts like the vents and the matching grey and gold materials and accents.
Again we have an IEM that doesn’t have a recessed socket for the protruding 2-pin plug, but neither is it a big detriment.
The cable is on the thicker side but it is not too heavy or unwieldy and resists tangling quite well.
The ring after the y-split is only useful for binding the cable for storage as it slips back down to the split without any resistance.
Sometimes I like to use these to decrease the size of the y-split, but that is not possible with this design.
At the very least, it looks fabulous when it inevitably becomes part of the y-split hardware. The Sound
If you’ve heard any number of Simgot’s current range of IEMs, you might have an idea of what their ‘house sound’ is.
Something that becomes profoundly transparent is that upper midrange and treble presentation is always of paramount concern, to the point it might become distracting or garish in it’s over-presence.
(measured with miniDSP EARS - the treble is ALWAYS exaggerated on this rig, it is much more linear in reality)
The SuperMix 4 shares aspects of this house-sound while possessing such a mature tuning, utilizing the planar and piezoelectric drivers to their fullest without ever crossing the line into sibilance.
The only part of the sound that appears to be pushed slightly further forward is around 3.5-4KHz, which only gives a tiny boost to vocals and some instruments.
Ultimately, this is neutral-heads dream.
It’s a touch colder than other neutrality kings like the E4000, which sounds more lush, but also doesn’t have the deep sub-bass reach and texture of the SuperMix 4.
It’s also a bit warmer than the Rose Technics Star City 5 Pro which can sound too sterile with it’s upper midrange emphasis.
The SuperMix 4 reaches all the way down into the sub-bass region with a fair performance that isn’t mushy, although it could be more tactile as some texture is clearly missing. Unfortunately, the single dynamic driver does not appreciate bass boost, and can quickly reach boomy territory as it reaches more enjoyable boosted levels.
It can take a 2 or 3dB bass boost under most circumstances, but it’s something to be aware of.
To end on a positive at least it doesn’t bleed at all into the mids or present any boominess in stock form.
The midrange doesn’t exhibit any strange timbre or unnatural tuning. It just sounds good, if a little cold.
Both male and female vocals sound like they’ve simply been recorded on a microphone with a colder tuning, so some people might want to dial in -1 or -2 decibels around the 3.5-4KHz range.
The treble is the party piece.
I had to make comparisons with my other IEMs, and clearly the SuperMix 4 has a more prominent treble, but I don’t mean that in a negative way.
It just extends up incredibly naturally and is tuned excellently.
As a sanity check, I compared it directly with my STAX SR-Lambda (that is not a typo), and there it was again, a similarly fully extended, delicate airy treble tuning.
I can’t put it in any other way. This is among the best tuned treble I’ve heard in an IEM.
Unfortunately, that tuning is limited by the staging.
While the imaging is actually rather good and accurate, the stage is more focused in the head, and there is a distinct lack of openness, of course not compared to most other IEMs, only compared to open back headphones. I just don’t want you to think that this is some kind of miracle IEM! Conclusions
That said, I still think this is a budget treble-heads dream.
It takes a big step up out of the entry level leagues and joins the ranks of one of the easier recommendations of 2024 for those looking for something a bit lighter sounding, more agile and relentlessly detailed and accurate in the upper most range.
If Simgot were to take any notes from this for a future improved version, I hope it would be to make a dual dynamic isobaric version with improved bass, or to add some maximum sized sub-woofer BA drivers.
We are now in an age where we are truly spoiled for choice in a sea of in-ear-monitors, and the SuperMix 4 can easily be counted among the safest choices.
Summary
The Supermix 4 is a popular release by Simgot, and I have been living with it for a while now. So what is the Supermix 4 and more importantly is it any good? The Supermix 4 is a quadbrid iem with a rather unique driver configuration of 1DD+1BA+1 Planar+1PZT, coming in at 150$. Build and design is good, fit and comfort is decent, packaging and accessories are decent. In terms of sound, Simgot has gone for a Harmon like tuning with some Simgot house sound touch to it. The Supermix 4 has an elevated yet well controlled sub bass region with a subtle roll off in the mid bass and lower mids. Upper mids and treble are bright, well extended with good energy and sparkle. Technical sound wise the Supermix 4 is pretty good as well. In my opinion Simgot did a good job with this set and if you like the Simgot house sound or the harmon tuning, this can be a good option.
Intro
Hey Guys, whats up….
Today I am checking out the Supermix 4 from Simgot. This is one of the more popular releases by Simgot. As the name might suggest, this is a quadbrid iem with 1DD+1BA+1 Planar+1PZT driver configuration. The retail price of this iem is 150$. So how does it compete with other sets at this price? Lets discuss
About the brand:
First, let’s get to know the brand, Simgot is a very popular ChiFi iem manufacturer beloved by many for providing great value for money products. I have personally used and reviewed many of their products, such as, EW200, EW300, EA500LM, EM6L, EA1000. Besides the Supermix 4, I recently also checked out the EW300. Anyways enough yapping lets get back to the Supermix 4, starting off with specs.
Disclaimer: Thanks to Simgot for providing this review sample. However, please note that this review reflects my honest and unbiased opinion. I strive for transparency in all my reviews, whether the product is self-purchased, a free sample, loaned or received at a discount.
Packaging
Continuing on to the packaging section, this comes in a good looking green colored box. Sliding off the outtser sleeve you will find a paper insert covering the box, beneath that you will see the iems nicely presented in a foam insert. Below that there are two more boxes containing the carrying case, cable, eartips and papers. This carrying case is very similar to their other sets, but this has a gold color zipper, and I like that the size is big enough to throw in a dac dongle. The eartips are decent in quality. The cable is pretty good, I will get into a bit more details later below. List of box contents:
iems
Cable
Carrying case
Papers
Build and Design
Moving on to the build and design of the Supermix 4, it is solid. This has high quality 3d printed resin construction with a metal faceplate. In classic Simgot fashion, they have gone for a minimalistic design. The faceplate is matte dark grey in color and has a circular design in the middle. Other than the faceplate the shell is glossy black in color. I like a good minimalistic design but this seems to be a bit too simple in my opinion. Moving on to the physical form factor, the shells are on the larger side and have nice weight to them, feels good in the hands. Fingerprints and scratches were not an issue in my use case. The nozzle width and depth is standard. The 2pin connectors are recessed type. The shells are vented.
Fit and Comfort
Talking about fit and comfort of the Supermix 4, it is good. This fits perfectly in my medium sized ears. Long term listening comfort is decent, nothing too crazy. Stability is fine. Isolation is good. Breathability is satisfactory. All in all I find it plenty comfortable for daily use.
Inner Structure and Tech
Let’s look at whats inside the Supermix 4. Simgot has gone for a rather unique quadbrid set up with a single dynamic driver, a single balanced armature, a single planar and a single piezoelectric ceramic driver, (1DD+1BA+1Planar+1PZT). The dynamic driver is 10mm.
Accessories Case
The Supermix 4 comes with a classic Simgot case found in many of their other sets. But one change is the color of the zipper, this uses a gold colored one. Although this does not look particularly fancy, I find this to be very practical, because the size is big enough to throw in a dongle. But for some this might be a down side as this is not very pocketable. Most importantly the zipper is smooth .
Cable
Now let’s look at the cable, the Supermix 4 comes with a well made and good looking cable. The silver and black theme of the cable goes quite nicely with the iems. Build wise this uses nigh purity silver plated copper cable (OFC). The cable is on the medium to thicker side. The braiding is nice and tight. The chin singe is functional. The cable has no major memory issue. The Y split and the connectors casing seem to be made of metal. There is minimal audible microphonics, close to none. Price wise I wish they provided modular terminations.
Sound
Please note: Listening impressions are highly subjective and can differ depending on different ear shape, individual music library, choice of source, eartips, cable and personal preferences, so your experience may differ. I personally always use and test all my gear in various setups to get a generalized idea on it. You can find my “tested with” info below.
Bass
Let's delve into the bass performance of the Supermix 4, which is quite good. This provides a snappy, fun yet high quality bass. In terms of positioning, the mid bass is subtly rolled off compared to the sub bass. The sub bass feels tactile and dynamic, slams hard when the music calls for it. Mid bass, although not as forward, provides decent punch. Overall, the Supermix 4 has a fast and precise bass response. The body and layering are executed quite well. Decay and reverberation are satisfactory, and bass note separation is good. Personally, I did not find it to be bloated or muddy in any way.
Mids
Moving on to the mids, Supermix 4 has a very similar midrange performance to their other sets. It prioritizes clarity and transparency with sparkle and crispness on top. The transition from bass to lower mids is slightly warm. Thus this contributes to a warm and thick male vocal performance, at least compared to the female vocals. Simgot usually goes for thinner and energetic upper mids, which is present here. This gives female vocals the shine and crispness. Positioning wise, female vocals are more forward compared to the male vocals. While this doesn't get sibilant or harsh, it will be fatiguing for treble sensitive listeners. I quite enjoyed the level of sparkle present in the midrange. Note weight and note separation is good.
Treble
Proceeding on to the treble section, they have opted for an bright tuning for the Supermix 4, and I can say it's executed well. In short the treble is refined, well-extended, and it flows nicely with the frequency range. Details are crisp without being too in your face. It is easy to spot intricate nuances. While there is no significant harshness or sibilance issues, treble sensitive listeners will find it bothersome. The speed is normal to fast type. The airy presentation enhances the sense of space in the soundstage. This has good resolving capabilities.
Technical Sound:
Soundstage of the Supermox 4 is good, with above average width. All three plains are decent, this has good width but the height could be better. Stage depth is good. Layering is fine.
Imaging is very good.
Sound separation and layering is good
Cohesiveness is good
Resolution is good
Dynamics are standard
Timbre is fine.
Tested With Source: cayin n3 ultra, cayin ru7, hiby r4, apple type c dongle
Eartips: stock, Final E, spinfit w1, Divinus velvet, Azla crystals
Cable: stock
Music: Tested with versatile genre of music
Final Rating Sound: 4.5/5
Fit and Comfort: 4.5/5
Build and Design: 3.75/5
Packaging: 4/5
Accessories: 3.75/5
Pricing: 4.5/5
Total rating: 4.5/5
Conclusion
So to conclude the review, do I recommend this set? I do recommend this set if you are looking for a mild V or harmon tuned set with great detail at this price, this is surely one of the best if not the best option. Big props to Simgot for such a good all rounder set.
And huge thanks to you all for sticking around, see yall in the next one
Simgot SuperMix 4 – Growing fondes with every listen
Pros: Great all rounder sounding (Harman, done right!)
Well articulate midrange
Great subbass extension
Non aggressive treble
Wide soundstage
Cons: Upper mids can be slightly peaky on less powerful sources
Need to find right eartips (this is crucial)
Harman curve (not everyone favours)
Simgot has released many IEMs that I think are always hits, starting from the EA1K, EM6L, and EA500LM–which was my favorite a while back, and the very latest one EW300 has also received a lot of positive reviews. The SuperMix 4 was released a few months ago, and in my opinion, there are mixed and varied opinions, but so far postive feedback... I believe this IEM requires synergy and can be a bit picky regarding source pairing. This hobby is truly subjective too, so everyone can have different opinions and tastes. Before diving deeper into the sound, let’s talk about non sound aspect first:
The Packaging and Accessories;
The SuperMix 4 has a medium packaging design featuring a cool green color scheme on the box with an illustration of the IEM. Inside, you’ll find:
- The IEMs themselves
- A solid 3.5mm cable
- Three pairs of eartips
- A protective case
While the accessory list may seem basic but it catter all the needs, the cable has really good quality, designed to complement the IEMs effectively. This is a significant improvement over what was provided with the previous models, like the EA500LM, which I thought was a bit flimsy. However, there are brings up mixed opinions with the sound is first is; the stock eartips, it tend to push the sub-bass quite a bit, making the sound of the SM4 a bit boomy and less clear, so it’s crucial to swap the eartips for aftermarket ones.
Build, Design, and Fit
In my opinion, the build quality is solid. They have a polished look, likely imitating metal but made from durable plastic. The design is minimalist yet masculine, and the choice of black adds to its elegance. While it feels plastic when held and is indeed lightweight, this lightweight design translates into comfort during long listening sessions, making them an excellent choice for extended use. The ear hooks on the cable also provide a great fit, enhancing comfort.
Sound Profile
After spending significant time with the SuperMix 4, I can confidently say it offers a well-rounded sound signature that leans toward clarity and it was what "Harman Target" tuning, if it done right! ... Initially, with the stock eartips, it was quite boomy, but this IEM really needs adjustments in sources to unlock it's true potential, as well as the right eartips. I tested it with the iBasso DC07 Pro and LG V60, along with Spinfit W1 eartips.
Bass
For me the bass is not overwhelming at all and its not basshead level, but well articulate and clear. I feel, the sub-bass stands out more than the mid-bass, providing a satisfying rumble that enhances the listening experience without muddiness. It won’t satisfy dedicated bassheads seeking hard-hitting and earth shaking low-end, but it complements the overall sound nicely. Tracks like "Short Shirt/Long Jacket" by Cake showcase this, delivering a clear low end that supports the music without overshadowing the mids..
Mids
The mids are where the SuperMix 4 truly shines for me. Vocals come through clean and vibrant, with a slight forwardness that enhances their presence. This makes it a fantastic choice for vocal-centric genres. However, when paired with unsynergized or weaker sources, there’s a hint of peakiness in the upper mids that might be noticeable, though it doesn't detract significantly from the overall enjoyment. Overall, I like how the midrange sounds; it has great note weight, and the sound feels organic without being dry or thin.
Highs
The treble is well-balanced, avoiding harshness while maintaining a sense of clarity. It’s not type aggressive one, making it suitable for listeners who prefer a smoother high-end experience. That said, on weaker sources, the lower treble can occasionally sound a bit artificial, but overall, it adds a nice crispness and clarity to the sound without causing fatigue during long sessions.
Technicalities
In my opinion, the soundstage of this IEM is pretty wide and holographic, with good imaging as well. The positioning of instruments in mixes is heard accurately, and the separation is also excellent. However, the resolution or detail retrieval is somewhat lacking compared to more analytical IEMs, but for me, this one relies more on musicality than analytical precision, which is its advantage.
Some Comparison
Vs Truthear Nova ($149)
In my opinion, both are well-tuned Harman target IEMs, and among the best. The bass on the Nova feels punchier compared to the SM4, which excels in sub-bass extension. The midrange is quite different too; the Nova has a more intimate and forward sound, making it great for female vocals, while the SM4 has vocals that sit more in the middle but offers better note weight and is less peaky in the upper range. For treble, when paired with good sources, both have similar quality—pretty smooth and not aggressive. Technically, I think the SM4 wins; it has a wider soundstage compared to the Nova more intimate one. Imaging is balanced on both, but the SM4 retrieves details slightly better.
Vs Kiwi Ears KE4 ($199)
Both IEMs didn't immediately appeal to me, but they've grown on me over time. They have quite different sound signatures: the SM4 is Harman-balanced, while the KE4 leans toward a laid-back neutral tuning, often referred to as "new meta tuning." Although people say the SM4 has big sub-bass, the KE4 is offers deeper sub-bass with more lingering decay. The mid-bass on both is nearly equal—not hard-hitting or punchy but has a great thump. The midrange differs as well; the KE4 has more weight in the low-mids and smoother upper mids, while the SM4’s low-mids are decent—not thin but quite balanced. Some tracks can be peaky on the SM4, whereas the KE4 maintains a smoother upper range, though the SM4 feels more open, especially for high-pitched female vocals. The treble on the KE4 is smoother. In terms of technicalities, both have similarly wide soundstages, but the KE4 offers more accurate imaging, while resolution and clarity are better on the SM4.
Vs Tri i3 Mk3 ($219)
The i3 MK3 more balanced and smooth, but it requires a fairly powerful source to drive it.. The SM4 has a more balanced harman and is easier to drive, although both need clean, quality sources. In terms of bass, the SM4 is far superior, as the i3 MK3 struggles with depth and texture. If you prefer a smooth sound, go for the i3 MK3; however, if you enjoy a more on colored sounds, the SM4 is better here. The treble on both is non aggressive, but it stands out more on the i3 MK3 due to its planar driver, which provides more bite in my opinion. Technically, the SM4 has a superior soundstage, while the i3 excels in imaging and detail retrieval, capturing tiny nuances more effectively.
Conclusion
So far, I think this IEM is solid, especially for fans of Harman sound, as it’s one of the well-executed options. It’s a well-rounded sound, and if you achieve great synergy, this IEM will offer a fantastic sound. For those who might not connect with its sound, i think it requires a deeper understanding; it's not the type of IEM that immediately fits my taste upon first listen too, but it’s one that grows on you with many listen.. Source selection is indeed important aspect, and I believe the SuperMix 4 offers a musicality that is impressive for its price and truly deserves its hype.
Where to Buy? Its available from various online retailers, including
I’ve been listening to these for 3 days. Clean, clear tuning. For the price, technicalities are very very good. Tight, detailed and textured bass, transparent mids, clean and extended treble. As with most Harmonish tuning, the mid bass is slightly recessed, i.e. less full, more space.
It’s quite neutral. It should work for most people. Even with the amount of details and nuances in the treble, it’s very clean and non-sibilant. I’m especially impressed with the way it handled SSS sound. For those are very sensitive to treble energy, a high shelf filter of 3dB above 4k would make it even smoother.
If you have a DAC/AMP like the Qudelix 5K, which offers a parametric equalizer, then u just select the FILTER TYPE = high shelf, FREQ = 4000Hz, GAIN = -3dB.
Or you may just do some ear tips rolling to fine the best match.
Or, you may not need to do all these. It’s quite neutral to start with.
I’ve been listening to these for 3 days. Clean, clear tuning. For the price, technicalities are very very good. Tight, detailed and textured bass, transparent mids, clean and extended treble. As with most Harmonish tuning, the mid bass is slightly recessed, i.e. less full, more space.
Received my SuperMix 4 today and love it, to my ears it’s a good upgrade form the EA500LM. It has amazing instrument separation, huge holographic sound, deep tight bass, warm detailed mids and extended highs. Only listened for an hour or so , but I doubt I will want to replace it. Also got a Truthears Nova as well, which can’t hold a candle to the SuperMix at a similar price.
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