Overview

The MOONDROP VOID (空鳴) is MOONDROP’s first full-size open-back over-ear headphone, developed from 2019 and released in 2022 after approximately three years of iteration [1]. Its self-developed 50 mm driver uses an FEA-optimized internal magnetic circuit, flexible suspension, and a heterorigidity composite diaphragm, with response tuning based on MOONDROP’s HRTF target. The detachable cable uses dual 3.5 mm headphone connectors and terminates in a standard single-ended 3.5 mm plug; a 6.35 mm adapter is included. MOONDROP’s current product listing shows it at 199.99 USD [2].

Scientific Validity

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Crinacle’s third-party page shows left/right raw response curves for a production sample measured on a GRAS 43AG-7 rig [3]. It does not display a Harman target overlay or a standard-deviation figure, so a target-error value cannot be reproduced from the cited page. MOONDROP’s own images likewise show a raw response curve rather than a quantified error from an independently defined target. The manufacturer specifies an effective bandwidth of 20 Hz-20 kHz (IEC60318-4, -3 dB), 110 dB/Vrms sensitivity at 1 kHz, and 64 ohms ±15% impedance [1], but bandwidth alone does not establish response accuracy.

MOONDROP describes large-amplitude nonlinear distortion as excellent but publishes no numeric distortion graph, and no identified third-party source provides a VOID distortion measurement. S/N ratio is not applicable to this passive headphone. Without a reproducible target-deviation metric or numeric distortion data, overall fidelity cannot be evaluated comprehensively; the scientific-validity score is therefore neutral.

Technology Level

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The VOID is an in-house design backed by a three-year development cycle, proprietary injection molds, driver development, FEA magnetic-circuit work, and manufacturing at MOONDROP’s own facility [1]. This demonstrates accumulated electroacoustic and production know-how rather than a simple catalog-platform purchase. The cited sources identify no patent, however, and its composite diaphragm, passive acoustic tuning, FEA workflow, and detachable connectors are now mature techniques that competitors can reproduce. It is also an analog and mechanical product without digital correction or software integration. The combination of genuine in-house expertise with limited current differentiation supports a moderately below-leading technology assessment.

Cost-Performance

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This site evaluates based solely on functionality and measured performance values, without considering driver types or configurations.

The VOID’s current price is 199.99 USD [2]. The HiFiMAN HE400se is the cheapest identified finished product with equivalent-or-better confirmed functions and available performance evidence, at 109 USD from both HiFiMAN and its Amazon storefront [4][5]. Both provide passive wired over-ear playback and detachable cabling, without wireless, ANC, or DSP functions.

Crinacle’s VOID graph and DIY-Audio-Heaven’s HE400se measurements both show output across the audible band, although their different fixtures and the absence of a target-error value for VOID prevent a numerical target-conformance comparison [3][6]. DIY-Audio-Heaven also publishes HE400se distortion at 85 dB SPL, but no equivalent VOID value exists, so lower distortion is not inferred. The HE400se selection is therefore provisional: its confirmed functions and documented audible-band response are not inferior on the axes that can be compared, while unknown VOID performance is not treated as a disadvantage.

CP = 109 USD ÷ 199.99 USD = 0.5450 → 0.5

Reliability & Support

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The VOID is a passive wired headphone with a replaceable cable, so it avoids batteries, firmware, and wireless electronics that can add failure modes. The cited sources provide no model-specific failure-rate, long-term durability, repair-turnaround, or parts-supply data. The live product page does not establish a warranty term or a long-term repair commitment. MOONDROP provides an official support form [7], but that alone does not establish future earpad or driver availability. With neither verified above-average durability nor evidence that support has ended, reliability and support remain neutral.

Rationality of Design Philosophy

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The VOID’s development uses acoustically relevant methods: an HRTF-based response target, FEA electromagnetic simulation, and in-house driver and tooling work [1]. Investment is directed toward magnetic-circuit optimization, response tuning, and repeatable mass production rather than decorative materials. Its proprietary suspension, composite diaphragm, and tooling are directly tied to acoustic performance and production consistency, complementing the measurement-oriented development approach. Claims of professional-monitoring suitability and excellent distortion are not used as evidence of achieved performance, but the underlying design direction itself remains scientifically rational and free of non-audio or occult premises.

Advice

The VOID remains listed by MOONDROP at 199.99 USD. Buyers should not infer a target-error value or distortion performance from the available raw graph and the manufacturer’s qualitative claim. The HiFiMAN HE400se is cheaper and has more complete independent measurements, but neither lower target error nor lower distortion can be established until the VOID has comparable target-referenced and distortion data. Before buying, confirm the seller’s warranty and return terms because the official product page does not state a warranty duration.

References

[1] MOONDROP Official Website — VOID product page — https://moondroplab.com/en/products/void — accessed 2026-07-17; manufacturer specifications and product-development images

[2] MOONDROP Official Website — Product listing — https://moondroplab.com/en/products — accessed 2026-07-17; current listed price: 199.99 USD

[3] Crinacle / In-Ear Fidelity — Moondrop VOID headphone graph — https://crinacle.com/graphs/headphones/moondrop-void/ — accessed 2026-07-17; production sample, GRAS 43AG-7, IEC60318-7; raw left/right response graph visually inspected

[4] HiFiMAN Official Website — HE400se product page — https://www.hifiman.com/products/detail/310 — accessed 2026-07-17; manufacturer specifications and listed price: 109 USD

[5] Amazon.com — HiFiMAN HE400se (B08Z2SK5C4) — https://www.amazon.com/dp/B08Z2SK5C4 — accessed 2026-07-17; current price: 109 USD; sold by HIFIMAN and shipped by Amazon

[6] DIY-Audio-Heaven — HiFiMAN HE400se measurements — https://diyaudioheaven.wordpress.com/measurements/hifiman/he400se/ — accessed 2026-07-17; raw frequency-response and THD graphs visually inspected; THD measured at 85 dB SPL, with the source noting the measurement-rig floor

[7] MOONDROP Official Website — Contact Support — https://moondroplab.com/en/contact-support — accessed 2026-07-17

(2026.7.17)