TWISTURA SIGMA REVIEW

>>I am brazilian and I speak portuguese, so forgive my english, I’ll use translation tools to help<<

INTRO:

Following up on our last review, we’re now going to test the TWISTURA SIGMA. It’s a bullet-style IEM, due to its resemblance to the shape of the object. Besides being harder to find in this style, the SIGMA also has the unique feature of being a hybrid IEM, meaning it has a dynamic driver and a balanced armature on each side.

Price: $68.90 USD
Color: Silver
Cable: 3.5mm no Mic, with Mic

Twistura reviews: WOODNOTE.

TWISTURA LINKS:

https://amzn.to/4dxoXz5 (US)

https://amzn.to/47Igw0e (JP)

https://s.click.aliexpress.com/e/_c4Tx3y8J (PC)

https://s.click.aliexpress.com/e/_c3GOqaPl (APP)

SPECIFICATIONS:

Hybrid: 1DD + 1BA

• (1) 10mm LCP Dynamic Driver
• (1) Balanced Armature

– Frequency: 15Hz – 37kHz
– Effective frequency: 20Hz – 20kHz
– Impedance: 26Ω±3 (@ 1kHz)
– Sensitivity: 107dB/Vrms (@ 1kHz)
– THD: ≤1.5%
– Connectors: 2pin 0.78mm QDC (detachable)
– Cable Plug: 3.5mm SE (straight design)
– Cable size: 1.20m
– Cable material: Copper silver plated
– Shell: aluminum alloy
– IEM weight: 2.7g (one side)(without eartips)
– Cable weight: 14.9g
– Total weight (packaging, iems, etc): 155.3g
– Packaging size: 15.3cm [H] x 9.6cm [W] x 3cm [D]

UNBOXING:

PHYSICAL ASPECTS:

Construction:

• The shell is made partly of aluminum and partly of resin.
• Bullet earphones are harder to find on the market.
• It’s not my preferred style, but I found it nice (subjective).
• Good build quality.
• It has 1 vent (ventilation hole).
• The carrying case is a leatherette pouch style.
• I prefer hard or semi-hard cases.
• The product come with a dongle and a 30Ω impedance adapter.

Eartips:

• Two types of eartips. Sizes S/M/L.
• Good eartips kit. Two different types.
• Could have more variety of eartips, but it’s OK.
• The similar TRN T-Tips needs to go up a size, if you use M, then it’s L.
• It’s possible to find the ideal sound with the stock eartips (subjective).
• I don’t see the need to acquire other eartips (subjective).
• I did the review with the transparent one (similar to the TRN T-Tips) (size L).

Cable:

• I liked the cable, it’s good quality.
• Aesthetically pleasing, and also very light and thin (a plus).
• Generally, for Bullet IEMs, the cable needs to be very light.
• Excellent malleability.
• Doesn’t tangle.
• Doesn’t develop “memory” (creases).
• Doesn’t have earhooks.
• No microphonics.
• First time I’ve seen a cable with a mic and chin slider!
• 2-pin 0.78mm QDC connectors.
• I don’t see the need to replace the cable (subjective).
• The connectors lacked polarity markings.

Fit and comfort:

• Direct fit into the ear canal. “Universal”.
• Great stability (the eartip does part of the job).
• Extremely comfortable (a very positive point).
• In practice, you only feel the contact of the eartips with the ear.
• Good shape for all ear types.
• Medium insertion.
• Good isolation (depends on the eartip).
• 2.8g, extremely light!
• One of the lightest I’ve ever tested.

Earphone kit (accessories):

• Sigma IEMs.
• 6 pairs of ear tips (sizes S/M/L).
• 3.5mm cable.
• Carrying case.
• 3.5mm to 3.5mm impedance adapter.
• 3.5mm/USB-C dongle.
• Manual and QC pass card.

SOUND ASPECTS:

Sound:

• Calm and relaxed sound.
• Neutral tuning with bass boost.
• Boost in the sub-bass, slightly emphasized upper-mids, and restrained treble.
• Definition is good.
• Detail is average.
• Technical aspects are not the IEM’s strong point.
• The impedance adapter didn’t provide any benefit (imo).
• The Woodnote is a much better IEM, even though it only has 1 driver.

Bass:

– Quantitative:

• Moderate bass. Neutral.
• Not for bassheads.
• Sub-bass with good presence.
• More discreet mid-bass.
• I feel a slight emphasis of the subs over the mid-bass.

– Qualitative:

• Controlled, warm, and massive bass.
• The texture and physicality are moderate.
• The extension is good. I didn’t notice any roll-off.
• In some situations, they sound a little muffled.
• The definition is good/okay.
• The impact is audible, although not strong.
• They don’t invade the midrange.
• They aren’t boomy, not bloated, not muddy.
• These are bass frequencies that fill out the presentation.

Mids:

– Quantitative and qualitative:

• The mids are very musical.
• Comfortable pinna gain.
• Upper-mids without harshness or aggressiveness.
• Slight emphasis on the upper-mids, but they don’t become forward.
• Good definition and transparency.
• I felt a little more airiness and detail.
• I didn’t experience fatigue in the upper-mids.
• Recommended for those sensitive to the upper-mids.
• The Woodnote is a step ahead of the Sigma in this region.

Voices:

• Good for both types of voices (low or high pitches).
• Although it’s not excellent with either of the two types mentioned.
• It will be ideal for those with a very diverse voice library.
• If you’re looking for IEM for vocals, prioritize the Woodnote.
• If price is an issue, there’s the Letshuoer D02.

Treble:

– Quantitative:

• Moderate to low treble.
• Neutral, but leaning more towards dark than bright.
• I didn’t experience any fatigue from the treble.
• Not for trebleheads.
• Recommended for those with sensitivity in that area.

– Qualitative:

• Soft, comfortable, controlled, and restrained treble.
• Sparkle with subtlety.
• Good level of definition.
• The detail and airiness are moderate. Could be better.
• They are not shrill, not sharp, not harsh.
• I didn’t heard any sibilance, coloration, or peaks.
• The chimes are presented softly. Subtle sparkle.
• Mandolin fingerings are very natural.

Soundstage:

• I found the soundstage to be average.
• It’s not a particularly impressive feature of these IEMs.
• I found the Woodnote to be better, with a greater sense of space.
• Average in depth, width, and height.
• I wonder if the IEM’s design impacted this technical aspect.

Imaging:

• I found the instrumental separation was good/okay.
• It’s somewhat influenced by the soundstage.
• I thought it would be better as a hybrid.
• In songs with a lot of speed, the performance drops.

Driver flex test:

• The Sigma didn’t have Driver Flex characteristics.

Amplification:

• Easy to push, but it improves with amplification.
• Doesn’t need a very powerful amplifier.
• A DAC/AMP dongle is sufficient.
• I review the with the FiiO KA11.
• KA11 at Volume 25-30 (out of 100 available on W10).
• I also tested the included dongle.
• I set it to volume 50 (out of 100 available on W10).
• I think the included dongle serves more as an adapter.
• The IEM allow for volume increase, but I listen at a low volume.

PROS AND CONS:

GRAPHS BY AFTERSOUND:

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