Overview

TWISTURA is a new entrant to the audio market. The D-Major is a 10 mm dual-chamber, dual-magnetic single-DD IEM with a beryllium-plated composite diaphragm and a detachable 0.78 mm 2-pin cable, selling around 50 USD. The company highlights a magnetic flux up to 1 Tesla and provides tuning accessories/nozzles and a metal build [1].

Scientific Validity

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Published specs list THD ≤ 1% @1 kHz, 108 dB sensitivity (@1 kHz), 22 Ω impedance, and a 15 Hz–37 kHz response (effective 20 Hz–20 kHz). The distortion figure is relatively high for modern IEMs and independent, full-suite third-party measurements are scarce at this time. Using the 0.5 midpoint as a baseline when data are incomplete and adjusting downward for the stated distortion, we set 0.4 [1].

Technology Level

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The dual-chamber/dual-magnet architecture, beryllium-plated diaphragm, and the claimed 1 Tesla flux indicate thoughtful engineering. Swappable nozzles add user-tunable response. However, absent public evidence that it surpasses state-of-the-art peers, this remains solid but not groundbreaking implementation [1].

Cost-Performance

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Comparator (equal-or-better in functions & performance):
Moondrop CHU II — detachable 0.78 mm 2-pin cable, 10 mm DD, manufacturer-stated THD ≤ 0.5% @1 kHz, 94 dB and 119 dB/Vrms sensitivity; independent measurements also show low distortion and well-controlled response [2][3].
Prices used: D-Major 50 USD (street) [1]; CHU II 19 USD (street confirmation) [4].

Computation: 19 USD ÷ 50 USD = 0.38 → rounds to 0.4.
Because a cheaper, equal-or-better option exists, the D-Major’s CP is 0.4 (scores are unified in USD for consistency).

Reliability & Support

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Sold via an authorized distributor with a stated 1-year IEM warranty / 3-month cable warranty. As a young brand, long-term RMA/MTBF data are not yet established, so we assign a neutral mid score [1].

Rationality of Design Philosophy

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The product focuses on measurable levers—airflow control, diaphragm rigidity/mass, magnet strength, and user-tunable nozzles—rather than nebulous claims. It’s a rational direction, though current public data do not show transparency-level performance across key metrics [1].

Advice

If your priority is objective value, start with Moondrop CHU II: it is cheaper while meeting or exceeding the user-facing functions and key specs [2][3][4]. If you value the D-Major’s aesthetic, nozzle-based tuning, or simply prefer its fit, it can still be a reasonable pick. Willing to spend slightly more? The TRUTHEAR ZERO line remains a sensible alternative to consider in this bracket [5].

References

[1] Linsoul, “TWISTURA D-Major,” https://www.linsoul.com/products/twistura-d-major (specs, warranty; accessed 2025-08-18)
[2] Moondrop, “CHU II,” https://moondroplab.com/en/products/chu-ii (specs incl. THD≤0.5% @1 kHz/94 dB; accessed 2025-08-18)
[3] Audio Science Review, “Moondrop Chu II IEM Review (measurements),” https://www.audiosciencereview.com/forum/index.php?threads/moondrop-chu-ii-iem-review.55179/ (measured data; 2024-06-16)
[4] Amazon US, “Moondrop CHU II,” https://www.amazon.com/dp/B0CB8HHS8V (price confirmation; accessed 2025-08-18)
[5] TRUTHEAR, “TRUTHEAR x Crinacle ZERO,” https://truthear.com/products/zero (product info; accessed 2025-08-18)

(2025.8.19)