Disclaimer:

Good morning readers, finally, after a while, something bullet-shaped in-ear is back. The last brand I tried that used this shape was KBear, I think. This shape is especially popular with those who like to fall asleep to music, as with the right earplugs, they practically disappear into the ear. I honestly find them uncomfortable for sleeping, but the passive isolation is excellent.

I’m not an audiophile; I’m just a guy who likes to test out different IEMs and DACs and spends a lot of time listening to music.

So, I won’t use overly technical words to review it, but I will do my best to describe it.

Tech Specs:

• 1DD 6mm LCP + 1 Custom 60040 BA –  Hybrid Driver Configuration;
• Impedance: 26Ω ± 3Ω;
• Sensitivity: 107dB;
• Frequency response range: 15 Hz-37 kHz;
• Connector: 2-pin 0.78mm.
• Cable material: High-Purity Silver-Plated Copper Cable;
• Price: 79$.

Packaging:

The packaging of the Twistura Sigma reflects the design seen on the D-minor; the shape changes, but the substance and equipment are almost identical.

Inside, we find:

• 6 pairs of eartips, 3 of which are liquid silicone (similar to the TRN model)
• A well-made dongle
• 3.5mm cable
• 3.5mm impedance adapter
• A carrying bag

The equipment is comprehensive and particularly high-quality, starting more or less from the same base as the D-minor with a few additions. In this case, they’ve introduced an impedance adapter, which is interesting to see even if not strictly necessary. Using it would require a really powerful dongle or single-ended amp.

Design/Build quality:

The Twistura Sigma’s design is true to the bullet type. Small, compact, and made of high-quality materials, metal and plastic, with a solid assembly. We can see how the shells, unlike some similar models, have ventilation holes. In such a small package, they managed to fit a small 6mm DD with an LCP diaphragm and a custom BA. As you can imagine from the price of $79, this isn’t exactly cheap, but it’s definitely more than that. The overall quality is remarkable. The nozzle is slightly thicker than usual due to the BA directly in front of the DD near the nozzle.

The quality of the included accessories is excellent, far surpassing most more expensive brands and products.

Initial sound impression:

I’ve seen mixed reviews for the Twistura Sigma, but I think some people were won over by their small size and the included impedance adapter. In fact, other similar models I’ve tried required a lot of power to sound their best, I think, due to their construction and the very compact DD. As long as you have good amplification capable of handling even low impedances, you shouldn’t need an adapter, which is advertised on the website as reducing background noise (I didn’t hear any background noise even using the very powerful Creative SoundBlaster G8).

Regardless, I wouldn’t use the included dongle, even though it works well, but I’d rather use something at least similar to a FiiO KA11.

I definitely notice that at a certain volume, they open up completely in terms of sound body and soundstage, so I find it hard to believe they’d work with even cheap dongles.

Equipment used for testing:

Device:

• Mac Mini
• Redmi Note 14 Pro 4G

Software:

• Amazon music UHD 24bit 96kHz (Both)

DAC:

• Fosi Audio DS3
• Creative X5
• Fosi Audio K7
• Nicehck Octave
• Fiio KA11

Tips & Cable Rolling:

In terms of cables, any upgrade is possible since the cable isn’t fixed. The Twistura Sigma is a quality in-ear, and the cables can be easily replaced, even if you need a cable without earhooks. As for eartips, the included ones are fine, but I had BGVP 07s that work great on these bullet models. With a medium-depth insertion, the sound undergoes a substantial upgrade compared to what it might initially seem from a quick listen.

Twistura Dac/Dongle:

I’m using the same words I used for the D-minor since the dongle is identical. However, I recommend using more powerful sources to ensure you get the full potential of the drivers.

The included dongle is a budget model made by TTGK that almost certainly uses a Conexant or perhaps Realtek chip.
The volume it can reach is adequate; for those who want to be worry-free, it’s the best solution for carefree use.

However, it should be noted that as a dongle, it reaches 32-bit 384 kHz and also has microphone support, making it a great compromise for use with simple IEMs.
Obviously, if you power it with something a little more refined, the driver’s soundstage and dynamics improve significantly. However, as a fully-equipped entry-level set, it’s an excellent starter pack.

Final sound impression:

As the hours pass, the more I listen to them, the more genuinely surprised I am by their sound. Achieving such a result in such a small enclosure is neither easy nor a given. Yes, there are well-known brands that have been making them for a long time, and even other brands, such as KBear Dumpling (I particularly liked them). These, however, are superior to the ones I had tried, positioned in a price range closer to $100, and are undoubtedly more refined in every way. Especially their ability to recreate a satisfying soundstage.

Final sound evaluation performed using the Creative SoundBlaster G8.

Treble

The extension is good but not without some peaks, even if the air seems slightly insufficient in some situations. However, the sounds of the cymbals are very bright, crisp, and not at all cut off; macro and micro details are not lacking, and despite the BA being directly in the nozzle, a few mm from the eardrum, I have to say they have found a good balance, but you still have to tolerate the treble.

Mids

The mids are amazing; there’s a focus on the mids that makes them the protagonists with a lot of energy and vitality. Even at the lowest volumes, you already have extremely refined mids. Vocals sound coherent and natural with excellent presence in the mix. Compared to the Dumplings, there’s a lot of detail and transparency here, even with regard to musical instruments. Upper-mids occasionally sound a little spicy.

Bass

The bass, which some reviewers say is poor, in my opinion, is not at all; perhaps the sub-bass extension is a little light and lacking in impact, but the low range, if properly powered, has a certain authority for the size of the DD.

The bass is fairly linear; it doesn’t excel in punch or speed, but it sounds coherent and satisfying. I think it also creates a bit of pressure in the ear canal, perhaps due to poor ventilation from the single hole I saw. Overall, the bass isn’t that weak, but I did notice that using the impedance adapter weakens the bass. This reinforces my initial suspicion that some reviewers used subpar amplifiers to test them and ended up with something that didn’t sound perfect.

Soundstage and Imaging:

The soundstage is above average for an in-ear type, managing to achieve a certain height and depth despite its simple construction. The image is sharp, defined, and lively. The layering is well done, and the directionality and separation of the individual elements are also well-executed.

Conclusion:

There’s no point in comparing these to cheap, old stuff. The Twistura Sigma are in a whole other league and are more refined. The bullet model isn’t trendy among everyone, but it has its appeal, especially if you have particular hearing, or if you like lying down with music in your ears. They’re generally very comfortable for everyone. A super-complete package with high-quality finishes makes for a product that sounds very good; with a few tweaks, it could sound even better. The first tip is to not use the impedance adapter, the second is to not use the included dongle, and the third and final is to change eartips. You’ll get a fuller sound across the entire spectrum and be more balanced at the same time. Excellent bullet in-ears that confirm my first impression of the brand.

7.8/10

Pros: 

• High Quality Build
• Plastic & metal
• Good, simple packaging
• Small shells with 6mm DD & 1 BA
• Warm & cozy sound signature
• Vivid, full & spacious sound
• Engaging
• Really catchy & full mids 
• Good details and layering
• Right amount of treble
• Passive isolation
• Easy to drive

Cons: 

• Dongle included (I used something stronger)
• Some treble peaks 
• Not too relaxing sound
• Ear Canal pressure (depends on tips)

Q/A:

Who is the Twistura Sigma for?

For people with small ears, for those who love the bullet genre, but also for lovers of a good vivid, and detailed sound.

Who should avoid the Twistura Sigma?

If you have trouble with spicy upper mids, these might be borderline for you. You’ll also need good amplification; the bass will sound dull and muted.

Similar alternatives to consider?

Bullet models are not very common, but if you want to try this type, I recommend the Kbear Dumpling to see if it’s right for you.

Where to buy?