Simgot Supermix 4 (1DD + 1BA + 1 Planar + 1 PZT)

KopitehC

New Head-Fier
Super Mix 4 - The Simgot step up!
Pros: Pros:
Comfortable fit
Very good isolation (To my ears)
Well-balanced U-shaped sound profile, ideal for various music genres
Strong technical performance, especially in imaging, layering, and soundstage category
Preserves good timbre and coherence despite the challenges of having multiple driver types to make work together
Smooth treble response
Clear midrange
Quick bass with minimal bleed and satisfying sub-bass rumble
Cons: Very low impedance might require source-dependency like DAC amps or DAP for meatier sound.
Upper mids can become sibilant at higher volumes
Mid-bass lacks some texture
This review reflects my genuine impressions after a week of in-depth experience with the Simgot SuperMix4.

In my opinion, Simgot is not a brand that relies on stacking multiple drivers, aligning more with the philosophy of major brands like Sony.

I believe Simgot has the capability to achieve high-quality sound with fewer units, even with a single dynamic driver. Therefore, when I saw Simgot launch the four-driver Quad-brid earphone featuring 1 Dynamic Driver, 1 Balanced Armature, 1 Planar Driver Tweeter, and 1 Piezoelectric Ceramic Driver, I was intrigued. Initially, I was puzzled, but after listening, I understood the rationale.

Simgot aims for excellence, refining their product before releasing it to the market.

I also suspect this approach is setting the stage for a future flagship product.
With thorough R&D, the integration of each unit will naturally lead to superior quality and density.

Thus, I see the SuperMix4 as both a market test and a foundation for future innovations.
Now, let's unbox it.


From the packaging, I inferred it would be around USD 200 range, simple and clear quad carton packaging, three pairs of silicone earplugs, and a fixed 3.5mm plug design.
You can purchase from the link below:
https://www.linsoul.com/products/simgot-supermix-4

The official price is $149.99 USD, showcasing Simgot's commitment to value.

The build quality features a metal cover with a resin cavity, and a black and gray color scheme that is understated and low-key.

The panel has a simple gold ring. It might not be as visually striking as other full-metal headphones in this price range, but it is comfortable to wear and feels well-made.

Sound-wise, the SuperMix4 offers a balanced, detailed, and natural listening experience.
Tuned according to the Harman 2019 curve, it embodies Simgot’s signature sound: accurate, clean, and low in distortion. The four distinct driver units complement each other, creating a harmonious and unified sound.
The SuperMix4 employs a Quad-brid four-frequency configuration.
The low frequency, powered by the dynamic driver, is natural and powerful, with moderate reverb that provides a robust atmosphere without overwhelming the mid and high frequencies.

The dive is deep and clear, ideal for those who prefer balanced bass.
The mid-frequency is a strength of the balanced armature, offering concentrated imaging and slightly close distance, with sharp, crisp vocals that shine, especially female vocals.

There is minimal sibilance, and it retains a HiFi character suitable for both enjoyment and monitoring.

In the high frequencies, the SuperMix4 combines the finesse of the piezoelectric ceramic unit with the smoothness of the planar driver, resulting in excellent detail and extension without excessive sharpness.

This balance ensures long listening sessions remain comfortable.

The integration of these diverse units by Simgot results in a cohesive sound greater than the sum of its parts, demonstrating their expertise in tuning.


While the soundstage is not the SuperMix4's standout feature, it is competitive within its price range, offering decent width and depth with accurate instrument positioning.

The dynamic performance is also commendable, providing a lively and detailed listening experience.


Overall, the SuperMix4 is a meticulously developed product by Simgot, representing a great value in the hybrid earphone market.

If you are eager to explore new technologies, I highly recommend the SuperMix4 for its unique blend of drivers and superb sound quality.

It offers an exciting and refined audio experience that won’t be outdated anytime soon.


In summary: Four-in-one, amazingly satisfying!

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baskingshark

Headphoneus Supremus
Pros: Comfortable to wear
Above average isolation
Balanced U-shaped profile, quite all-rounder for most music genres
Good technical chops, with imaging, layering and soundstage a highlight
Decent timbre and coherency despite packing a multitude of different driver types
Smooth treble
Transparent midrange
Speedy bass without bleed, good amount of sub-bass rumble
Cons: Dearth of accessories
Very low impedance; this IEM may be fussy to pair source-wise (for sources with high output impedance)
Upper mids may be borderline shouty (more apparent at louder volumes)
Mid-bass could do with better texturing
DISCLAIMER

I would like to thank Simgot for providing this review unit.

The SuperMix 4 can be gotten here: https://www.linsoul.com/products/simgot-supermix-4 (no affiliate links).

Supermix 9.jpg



SPECIFICATIONS
  • Driver configuration: 1 x 10 mm polymer diaphragm dynamic driver + 1 x balanced armature driver + 1 x micro-planar driver + 1 x piezoelectric driver
  • Frequency response: 20 Hz - 20 kHz
  • Impedance: 7.2 Ω
  • Sensitivity: 120 dB/Vrms
  • Cable: 2-pin, 0.78 mm; oxygen-free copper silver-plated cable; 3.5 mm termination
  • Tested at: $149.99 USD

ACCESSORIES

Other than the IEM, these are included:

- 3 pairs of silicone eartips (S/M/L)
- Cable
- Carrying case

The accessories are disappointing for something retailing north of a 100 bucks. Usually, gear at this pricing would incorporate a variation of eartips, in addition to perhaps a modular cable.


Supermix 3.jpg


The sole set of silicone eartips are ergonomic and are serviceable sound-wise, though as stated, a wider selection of silicone tips or even foam tips would have been much appreciated.


Supermix 1.jpg


The stock cable is an oxygen-free copper silver-plated cable, coming in a 2-pin termination. There is only a single-ended 3.5 mm option available, and it is nothing to write home about in terms of haptics. This cable is Litz braided and hefty, though it is somewhat tangly with a smattering of microphonics. There is a chin cinch for securing the IEM during usage.


Supermix 7.jpg


Last but not least, we have a semi-rigid zipper carrying case. The innards have webbing and a soft material to cushion the contents, and the externals are tough enough to survive some compression.

The rest of this review was done with the stock cable and stock silicone tips. No aftermarket accessories were used, so as not to add any confounders to the sound.


BUILD/COMFORT

Supermix 6.jpg


The shells are fashioned from black 3D printed resin, with CNC-machined matte metal faceplates.

Weight and size is moderate, and comfort is surprisingly decent even when using the SuperMix4 for longer listening sessions. The inner aspects are smooth, with a concha protrusion for stability.

Supermix 8.jpg


Isolation is above average, and it can be used in outdoor environments without much issues. I did not find any driver flex on my set.


INTERNALS

The SuperMix4 sports an eclectic array of drivers. We have 4 disparate driver types paired in a 4-way RC crossover design:
- 1 x 10 mm polymer diaphragm dynamic driver handles the bass.
- 1 x self-developed balanced armature settles the midrange - we do not have any information on the brand of the BA unfortunately.
- 1 x micro-planar driver takes care of the treble.
- 1 x piezoelectric driver with a multi-layer ceramic + copper coating pushes the upper treble.


DRIVABILITY

I tested the SuperMix4 with the following sources:
- Apple dongle
- Cayin RU7
- Chord Mojo 2
- Fiio KA11 dongle
- Fiio KA17 dongle
- Khadas Tone Board -> Schiit Asgard 3 amp
- Questyle M15 DAC/AMP dongle
- Sony Walkman NW A-55 DAP (Walkman One WM1Z Plus v2 Mod)
- Sony Walkman NW A-55 DAP (Walkman One Neutral Mod)
- Sony Walkman NW WM1A DAP (Walkman One WM1Z Plus v2 Mod)
- Smartphone

In terms of headroom requirements, the SuperMix4 is moderately drivable, and should be okay to be driven off weaker sources.

However, due to its ultra-low 7.2 Ω impedance, this IEM may be a potentially tricky pairing for sources with high output impedance, due to the rule of 8ths. Ideally, it should be used with sources with < 0.9 Ω output impedance, otherwise the frequency response might be skewed, and it may sound bassier (this may or may not be desired).


SOUND & TECHNICALITIES

Simgot SuperMix 4.jpg

Graph of the Simgot SuperMix4 via IEC711 coupler. 8 kHz is a coupler artefact peak.

Tonally, the SuperMix4 can be described as having a U-shaped signature when paired with a low output impedance source. This frequency response is pretty all-rounder for most music genres.

The SuperMix4 is sub-bass focused, with good extension and rumble. It isn't a basshead IEM, though the sub-bass is quite copious. The mid-bass has average texturing, though it is speedy with no mid-bass bleed.

The lower midrange has a small scoop-out as per the U-shaped signature, though it isn't as deeply depressed as a typical V-shaped IEM. This region is clear and transparent, with no mid-bass encroachment. The upper mids hit about 8 dB ear gain, which is at the edge: at low to moderate volumes, this region is forwards without shout - but at louder volumes (as per the Fletcher Munson curve), it may possibly be harsh for female vocals.

After the upper mids peak, the SuperMix4's treble tails off early, and this translates to minimal sibilance and a smooth treble. This will be a safe recommendation for the treble-sensitive, though understandably, trebleheads might want a bit more pizzaz here.

The SuperMix4 has commendable technicalities. It has an expansive soundstage in all 3 dimensions, with music projecting beyond the ears and forehead. Imaging is pinpoint, with superb layering and instrument separation. Indeed, the SuperMix4 handles complex tracks with aplomb. For something not overly steroid-boosted in the treble, the SuperMix4 still retains a good grasp of micro-details, but perhaps there are rivals which have better resolution.

I appreciate that despite packing a Frankenstein-mix of diverse driver types, the SuperMix4 has decent timbre for acoustic instruments and vocals. The myriad types of drivers match each other in speed and coherency, unlike some less well-implemented quad-brids, which suffer from phasing issues between the bass and treble for example, or have marked timbral differences.


COMPARISONS

Supermix 4.jpg


The SuperMix4 will be compared against another MidFI quad-brid with a similar heterogenous driver configuration in the Kiwi Ears Quintet. The latter does have an additional BA, but otherwise is a suitable comparison, compared to traditional hybrids, single DDs, multi-BAs, and pure planars, which have their own pros and cons cause of the different transducers.


Kiwi Ears Quintet

The Quintet is more expensive at > $200 USD, and it utilizes a 10 mm diamond-like carbon (DLC) DD, 2 Knowles BA drivers, a 5 mm MPT (micro planar transducer) driver, and one piezoelectric driver.

The Quintet has a thinner note weight, with less bass but more treble. The Quintet also has less natural metallic timbre, and is notably more aggressive and harsher in the treble region, with sibilance in spades.

In technicalities, the Quintet has better micro-detailing, with imaging on par. However, the SuperMix4 beats it in soundstage and layering.


CONCLUSIONS

Supermix 2.jpg


The SuperMix4 is a unique quad-brid, accommodating a varied - and exotic - array of driver types. This mishmash of transducers could easily flop in terms of timbre or coherency, but I'm pleased to report that Simgot has put them all in without much penalties in balancing.

Espousing a consumer-friendly U-shaped signature with a smooth treble, transparent midrange and speedy bass, the SuperMix4 is pretty all-rounded for most music genres. This set also has superb imaging and soundstage, and one can easily pinpoint instruments on a dark background. And this is without veering to an overly sterile soundscape or overzealous treble, with the robust sub-bass adding some musicality back to the equation.

Perhaps some minor flaws would be the upper midrange being at the border of shoutiness - this is apparent at louder volumes (as per the Fletcher Munson curve); using the SuperMix4 at lower to moderate volumes mitigates this - and the mid-bass could do with better texturing.

The SuperMix4 is ergonomic enough despite the moderate sized shells, with above average isolation. Sadly, the accessory line-up is lacking for the price, and its ultra-low 7.2 Ω impedance may potentially be a problem with higher output impedance sources, as per the rule of 8ths.

In the big scheme of things, the SuperMix4 does most departments well for a $100ish set, balancing musicality and technicalities, and it is something different from the run-of-the-mill sidegrades we see on a weekly basis.
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baskingshark
baskingshark
Hi @Tamizhan Wind has a deeper and taller stage, whereas the SM4 has a wider stage.
Tamizhan
Tamizhan
That still leaves both options on the table. Just a last question. Does the layering and separation on SM4 better?
baskingshark
baskingshark
@Tamizhan about on par technically. I see them as sidegrades.

atechreviews

100+ Head-Fier
SIMGOT SuperMix 4 IEM Review
Pros: Harman tuning
Clear and detailed bass with no bleed into the mid-range
Clean and detailed vocals
Well-extended treble adds clarity and airiness
Decent technical performance across the frequency range
Versatile configuration with four distinct drivers
Cons: Upper mid-range can be shouty or shrill at higher volumes
Bass lacks slam and thump, with average texture
Treble can sound harsh and with an unnatural timbre at moderate to loud volumes
EA500 LM has better bass slam and texture, less energetic upper mid-range, and similar technicalities
The SIMGOT SuperMix 4 IEM is an ambitious piece of audio engineering, featuring a unique hybrid driver setup that includes a dynamic driver, a balanced armature, a planar driver, and a piezoelectric (PZT) driver. This combination aims to deliver a comprehensive and nuanced sound signature, catering to those seeking detail and clarity across the spectrum. However, the execution of this ambitious design comes with both strengths and notable weaknesses.

What's in the box:

1x SuperMix 4 IEM
1x Cable
1x Carrying case
1x Set of ear tips

IMG_20240528_151214.jpg

Build and Comfort​

The build quality of the SuperMix 4 is impressive, showcasing a sleek and modern design. The housing is sturdy, made from a combination of a metal and resin that feel nice. The fit, however, may be subjective; while some users might find it comfortable for extended listening sessions, others might struggle with the size and shape of the ear shells. Personally, I found them to be reasonably comfortable.

Sound Analysis​


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Bass​

The bass performance of the SuperMix 4 is characterized by its clarity and detail. The low frequencies are defined, providing a good foundation without bleeding into the mid-range. However, the bass lacks the visceral slam and thump that many listeners crave. The texture is average, and while it is sufficient for most genres, it doesn't deliver the kind of impact that makes the music come alive. This is particularly noticeable when compared to the SIMGOT EA500 LM, which offers a more textured and impactful bass response with a stronger, more impressive bass slam and texture.

IMG_20240528_150800.jpg

Mid-Range​

The mid-range on the SuperMix 4 is a mixed bag. The lower mids are clean and detailed, providing good separation and clarity for instruments and vocals. However, the upper mid-range have a tendency become shouty and shrill, especially at higher volumes and with certain genres. This can make listening fatiguing over extended periods. It's advisable to keep the volume at a moderate level to avoid this issue. In comparison, the TruthEar Nova offers a more balanced mid-range with better control, avoiding the shoutiness that the SuperMix 4 can exhibit.

IMG_20240528_150813.jpg

Treble​

The treble on the SuperMix 4 is well-extended, adding a sense of airiness and clarity to the sound. This extension, however, comes at the cost of harshness and an unnatural timbre at moderate to loud volumes. The PZT driver contributes to this extended treble, but it can sound piercing sometimes, detracting from the overall listening experience.

IMG_20240528_150830.jpg

Technical Performance​

In terms of technicalities, the SuperMix 4 performs admirably. The soundstage is wide for an IEM. Imaging is accurate. The overall detail retrieval is commendable, on par with other IEMs in its price range, such as the TruthEar Nova and the CKLVX 4.

Comparisons​

SIMGOT EA500 LM​

Compared to the SuperMix 4, the EA500 LM is a more engaging and fun IEM. The bass on the EA500 LM has more texture, slam, and impact, making it a more enjoyable listen for many genres. The upper mid-range on the EA500 LM is less energetic, resulting in a smoother and more pleasant listening experience. While both IEMs offer similar levels of detail retrieval, the EA500 LM's overall tuning makes it a more versatile and enjoyable option.

IMG_20240528_151337.jpg


graph - 2024-05-28T103225.401.png


Kiwi Ears Quintet

The Kiwi Ears Quintet has a similar driver configuration with the exception of an additional BA. The Quintet has a more impactful bass with better texture and slam, providing a fuller and more dynamic low-end response. The mid-range has some BA timbre and has less tendency to become shouty, offering a more pleasant listening experience with better technicalities.

graph - 2024-05-28T132336.398.png

TruthEar Nova​

The TruthEar Nova offers similar technicalities to the SuperMix 4 but avoids the tendency for shoutiness in the upper mid-range. The Nova's bass has better slam and impact, though the lower mid-range can sound a bit thin. Despite this, the Nova provides a more balanced and controlled sound, making it a better option for those who find the SuperMix 4's upper mid-range too aggressive.
graph - 2024-05-28T103314.884.png

CKLVX 4​

The CKLVX 4 is another competitor that handles the vocal gain region more effectively than the SuperMix 4. It never sounds shouty or harsh, though it does have a treble peak above 10kHz. The ear shells are on the larger side, which can be uncomfortable for some people. Despite this, the CKLVX 4 offers a more relaxed and pleasant listening experience compared to the SuperMix 4.

graph - 2024-05-28T103357.681.png

AFUL Explorer​

The AFUL Explorer stands out with its superior bass slam, impact, and texture. The mid-range is more intimate, controlled, and smooth, never sounding harsh or shouty. While the SuperMix 4 is more vocal forward and has more treble extension, the Explorer's treble is detailed and smoother, providing a more enjoyable listening experience for those sensitive to treble harshness. The Explorer's overall tuning makes it a more refined and balanced option compared to the SuperMix 4.

graph - 2024-05-28T103334.464.png

IMG_20240528_151434.jpg


Conclusion​

The SIMGOT SuperMix 4 is a well-built IEM with a unique driver configuration. For those who prioritize detail and clarity and can tolerate its tuning quirks, the SuperMix 4 might be a worthwhile consideration. However, for a more balanced and enjoyable listening experience, alternatives like the SIMGOT EA500 LM, Truth ear Nova, CKLVX 4, or AFUL Explorer are worth exploring.

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dezzadk
dezzadk
I feel like either there's QC variance or people are genuinely listening to these at different volumes or smth that can affect their judgement on these..

There's a lot of praise, but all that don't like them all mention the same things - better at low to mid volume, shouty..
S
sussybaka~twennywun
@atechreviews curious, what source do you use for supermix and other iems? heard supermix has very low impedance so a powerful source can sound different (worse or better)
R
ronin4
An hour or two ago i didnt know what impedance was lol, now Im put off these with it being so slow compared to other IEM's, a reddit thread suggest this can lead to the cable affecting the sound quality? I am looking to pair these with a Sony NWA 55 and later on the A&K Activio P1.
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