Short answer: the Twistura Sigma. It ranks #655 of 1291 in-ear headphones by sound quality, rated 3.7/5, at $72.90; the TRN VX ranks #769, rated 3.6/5, and costs $72.99, so there is not much of a tradeoff to weigh.
Why pick the Twistura Sigma: Nine hobbyist measurements give this one dynamic plus one balanced armature hybrid a preference score of 70 with a smooth 2.21 dB deviation, so the midrange sounds natural. The catch: Treble falls about 3 dB and air about 4 dB below target, with an 8.4 dB dip near 11.9 kHz, so cymbals and spacious recordings lose sparkle.
What the TRN VX does well: A budget hybrid with one dynamic driver and six balanced armatures. The catch: Bass sits about 2.2 dB below target, so it sounds lean.
Buy the Twistura Sigma. It is rated higher for sound quality than the TRN VX and costs less, which makes it the one to get unless you need something the other one does better.
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Nine hobbyist measurements give this one dynamic plus one balanced armature hybrid a preference score of 70 with a smooth 2.21 dB deviation, so the midrange sounds natural.
Amazon $72.90 eBay
A budget hybrid with one dynamic driver and six balanced armatures.
Shenzhenaudio $72.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| Twistura Sigma | TRN VX | |
|---|---|---|
| Price | $72.90 | $72.99 |
| Ranked | #655 of 1291 in In-Ear Headphones | #769 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 70 (median of 9 squig.link measurements, calibrated to AutoEQ) | 68 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.21 dB standard deviation | 2.38 dB standard deviation |
| Tonal Tilt | -0.18 (negative is warmer, positive brighter) | +0.52 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) | Hybrid |
| Drivers | 1 x 6mm dynamic + 1 x balanced armature | 1 x 10mm dynamic + 6 x balanced armature |
| Impedance | 26 ohms | 22 ohms |
| Sensitivity | 107 dB | 107 dB/mW |
| Frequency Response | 15Hz - 37kHz (Manufacturer specified) | - |
| Built-in Microphone | No | - |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the Twistura Sigma from aftersound, bassaudio, boizoff, hu-fi, kuping-sensi, pw, soundcheck39, soundignity and vortexreviews; the TRN VX from bedrock, bryaudioreviews, eplv, melatonin, musicafe and pw, all via squig.link.
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