The SuperMix 4 has probably been one of the most recommended IEMs in the $100-$150 range over the past year, and after spending some time with it, I can see why. It doesn't have an aggressive or polarizing tuning that immediately grabs your attention. Instead, it's one of those sets that simply does most things well.

If I had to describe it in one sentence, I'd call it a neutral-bright all rounder with impressive technical performance that prioritizes clarity over musicality.

That also means it won't be everyone's cup of tea.

# Test Gear

* Tanchjim Space Pro
* TRN Black Pearl
* CX31993 dongle
* Usual Test Playlist

# Build & Comfort

The SuperMix 4 is surprisingly lightweight considering its driver configuration. The resin shell and aluminum faceplate combination feels well put together and the ergonomics are excellent.

Comfort is one of its strongest points. I had no issues wearing it for longer listening sessions and the shells disappear quite easily once they're in your ears.

The accessories are decent but nothing that really stands out. The cable is perfectly usable, though I do wish Simgot included a modular cable at this price point.

# Sound

The tuning of the SuperMix 4 is fairly balanced with a slight emphasis towards clarity and upper midrange energy. It's not an overly analytical IEM, but it definitely leans more towards technical performance than fun or warmth.

# Bass

The bass presentation is clean and controlled rather than fun or exaggerated.

Sub-bass extends nicely and provides enough rumble when required, while the mid-bass has decent punch and definition. Bass notes are quick and don't linger longer than necessary, which helps maintain the overall clarity of the presentation.

The downside is that the bass isn't particularly exciting. If you're coming from warmer or bassier IEMs, you might find the SuperMix 4 lacking a bit of physicality and note weight.

I wouldn't call it bass-light, but I also wouldn't recommend it to someone specifically looking for a fun or bass-heavy signature.

# Midrange

The midrange is where the SuperMix 4 starts to show why it's so popular.

Vocals are clean, detailed and nicely separated from the rest of the mix. Female vocals in particular sound excellent thanks to the upper midrange emphasis, while male vocals have good presence without sounding muddy or overly thick.

The presentation feels open and spacious, which works wonderfully for acoustic tracks and genres that benefit from instrument separation.

However, that clarity-first approach does make the midrange sound slightly thinner compared to warmer sets. If you're someone who enjoys rich and lush vocals, there are definitely better options available.

# Treble

Treble is energetic, airy and well-extended.

There's plenty of detail and sparkle without becoming overly sharp most of the time. Cymbals sound crisp and instruments have a nice sense of air around them, which contributes significantly to the SuperMix 4's technical capabilities.

That being said, I wouldn't blindly recommend this to treble-sensitive listeners. The upper frequencies can occasionally become intense depending on the recording quality and listening volume.

It's not a harsh IEM in my experience, but it's certainly not relaxed either.

# Technical Performance

This is arguably where the SuperMix 4 earns its reputation.

* Excellent instrument separation
* Very good layering
* Impressive detail retrieval
* Spacious presentation
* Good imaging performance
* Above average soundstage

The SuperMix 4 performs extremely well in busy tracks and rarely sounds congested. Instrument placement is easy to follow and layering is particularly impressive for the price.

I wouldn't call it the most holographic sounding IEM in the world, but technically speaking, it comfortably competes with some more expensive options.

# Gaming

The SuperMix 4 is quite good for gaming thanks to its clean presentation and imaging capabilities. Footsteps and positional cues are easy to distinguish, and the spacious presentation helps create an immersive experience.

It's not something I'd buy solely for gaming, but it's certainly a nice bonus.

# Conclusion

If you're looking for an IEM that prioritizes clarity, detail retrieval and technical performance while remaining easy to listen to, the SuperMix 4 deserves all the praise it gets.

Just don't expect it to magically become everyone's endgame. Some people will inevitably prefer something warmer, bassier or more musical—and that's perfectly fine.

The SuperMix 4 isn't trying to be everything. It's simply trying to be a really good all-rounder, and it succeeds at that remarkably well.

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