Simgot Supermix 4 Review

Simgot Supermix 4 review featured

In this article, I review the Simgot Supermix 4 IEM. The Supermix 4 features an exotic 1DD+1BA+1PM+1PZT quad-driver configuration. It’s priced at USD 149.

Disclaimer: This sample was provided by Simgot for an honest review. All observations and opinions here are my own, based on my experience with the product.

Simgot Supermix 4 Review
The Simgot Supermix 4 delivers a great sound with an exotic driver mix at an affordable price.
Add your rating here!3 Votes
Full-bodied bass
Warm, natural tonality
Non-fatiguing treble
Precise imaging
Overall resolution
Is picky with sources due to its low impedance
Our Score

Simgot Supermix 4

Table of Contents


Driver Configuration: 1 DD+1 BA+1 Planar +1 PZT
Impedance: 7.2Ω±15% (@1kHz)
Sensitivity: 120dB/Vrms (@1kHz)
Frequency Range: 8Hz-40kHz
Effective Frequency Response: 20Hz-20kHz
Connector: 0.78mm 2-pin
Cable Material: Litz Structure High-Purity Oxygen-Free Copper Silver-Plated Wire
Plug: 3.5mm Unbalanced Plug

In the Box

  • Simgot Supermix 4 IEMs
  • Detachable 0.78mm 2-pin silver-plated OFC cable
  • Carrying case
  • 3* pairs of silicone eartips
  • User manual


Simgot opted for a subtle yet elegant design for the Supermix 4. It has dark grey matte aluminium faceplates adorned with a rose gold circle intersecting a small vent. The body of the shells is made from a dark translucent 3D-printed resin.

There’s another small vent near the 2-pin sockets. The triple-bore nozzles are moulded into the shell body. Overall, the build quality feels excellent.

The included cable is made of silver-plated oxygen-free copper, with aluminium components that match the colour of the IEMs. It feels durable and handles well.


Gear used for testing includes the HiBy R3 II, FiiO KA17 and SMSL DO300EX. Supermix 4 is easy to drive but due to its low impedance, I’d suggest a suitable source with a low output impedance. When I plugged the IEMs directly into my laptop, the sound became thick and bloated. Switching to the FiiO KA17 yielded an immediate and noticeable improvement.

Supermix 4 has a warm and musical sound signature, offset by some zest in the upper midrange. It’s a mix of tonal richness and technical agility that sets Supermix 4 apart – undoubtedly aided by its exotic driver configuration and clever tuning.


The bass is tastefully elevated and has an emphasis on the sub-bass response. It’s not a basshead IEM in terms of quantity but even they should enjoy the level of depth provided here.

The mid-bass is punchy enough and while it’s not an ideal bass in terms of definition and slam, it sounds natural and engaging. The bass plays a large part in creating the Supermix 4’s warm tone but the quality of the drivers and overall tuning means it maintains a good balance with the mids and the treble.


Supermix 4’s midrange is on the warmer side of neutral with a forward presentation. It’s imbued with warmth, creating a rich and smooth sound with full-bodied vocals and instruments.

While the mids are slightly darkened, this is contrasted by a more pronounced upper midrange and lower treble, maintaining clarity and detail. The rich midrange showcases high resolution, facilitated by clean transients that prevent mushiness or congestion.

Snare attacks are slightly softened, but the overall transient response remains crisp. Occasionally, there is a hint of sharpness in the upper mids at higher volumes but those moments are infrequent enough to avoid being problematic.


The treble is neither overly aggressive nor relaxed but is instrumental in Supermix 4’s tonal balance. While it doesn’t stand out as the most sparkly or effervescent treble, it provides ample clarity and definition. There’s just enough energy to compliment the warmth of the bass and mids without veering into harshness.

Extending further, the treble is refined and controlled, ensuring that the highs are presented with precision. This careful tuning avoids any sibilance or piercing tones, making for fatigue-free listening while creating a sense of airiness and spaciousness.

Soundstage & Technicalities

The Supermix 4 offers an impressive soundstage enhanced by its excellent resolution and precise imaging. It excels in detail retrieval despite its warm tone. The spatial accuracy and depth make instrument and vocal placement easy to determine within the boundaries of the stage.


AFUL Explorer $119 (USD)

The AFUL Explorer (review here) is a 1DD+2BA hybrid IEM with attractive comfortable shells. It has a ‘safer’ tuning in regards to its upper midrange and treble tuning – meaning it’s great for anyone sensitive to high-frequencies.

The Explorer can’t compete with the Supermix 4 on technicalities but keep in mind it’s about $30 cheaper (at the time of this review).

Kinera Celest Relentless $169 (USD)

The Kinera Celest Relentless (review here) is a 7-driver (1DD + 6BA) IEM with a fairly similar tuning. The main differences are in the upper midrange and treble where Relentless is more forward, giving it a brighter tone than the Supermix 4. However, relentless doesn’t have as much treble extension, so although it has good detail retrieval, it’s not as revealing as the Simgot.

Apart from the tonal difference, the Relentless isn’t quite as resolving nor does it match the Supermix 4’s imaging precision.


The Simgot Supermix 4 does a lot of things right. It’s a fun and musical IEM that also scores highly technically with its resolution and micro-detail retrieval. This IEM is for anyone who likes a warm sound signature with a full-bodied bass but also demands good instrument separation and imaging. And the icing on the cake is that the Supermix 4 does all this at an affordable price point.

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