Overview

Moondrop’s Para II is a second-generation full-size open-back planar magnetic headphone built around a 100 mm diaphragm and the company’s FDT (Full Drive Tech) motor. The design adds an N55 magnet array optimized via FEA, a 1.2 μm ultra-thin diaphragm, and a secondary diaphragm stress-balance structure in a lighter stainless-steel chassis. Priced at 499 USD, it targets the mid-tier planar segment with a “scientific tuning” approach and easy-drive specs (9 Ω, high sensitivity) [2][5].

Scientific Validity

\[\Large \text{0.4}\]

Manufacturer specifications claim THD ≤ 0.03% at 1 kHz/94 dB and list 9 Ω impedance with 106 dB/Vrms sensitivity [2]. Independent measurements from UnheardLab show higher mid/treble distortion at 94 dB SPL—roughly 0.2–0.5% between ~1.5–8 kHz—while noting the rise appears limited to one channel on the tested unit; the other channel measures very low, implying potential unit variance [1]. Given that ~0.5% THD in the critical midrange approaches a problematic region for headphones, we consider the scientific validity mixed. Effective frequency response coverage is 20 Hz–20 kHz (−3 dB) by manufacturer data [2], and UnheardLab reports measured sensitivity around 110 dB/Vrms [1].

Technology Level

\[\Large \text{0.8}\]

Para II incorporates modern, in-house technologies: a 1.2 μm thin diaphragm, an N55 magnet array modeled via FEA for field uniformity, and a secondary diaphragm stress-balance mechanism, all under Moondrop’s FDT motor architecture. The stainless-steel, magnetically attached pad system and included balanced 4.4 mm cable round out a technically sophisticated build for the class [2].

Cost-Performance

\[\Large \text{0.5}\]

Comparator (equivalence basis): HiFiMAN Edition XS—also an open-back planar with neutral-leaning response and comparable distortion performance per RTINGS’ Test Bench 2.0 harmonic-distortion evaluation (same order of magnitude in the mids at reference levels) [4]. Current official price observed for Edition XS is 269 USD [3].
CP calculation: 269 USD ÷ 499 USD = 0.539 → 0.5.
Para II’s proprietary motor/diaphragm work is appreciable, but at street prices the XS delivers similar user-facing performance for significantly less.

Reliability & Support

\[\Large \text{0.6}\]

Build quality is robust with a brushed stainless-steel frame, magnetic sheepskin pads, and a dual-3.5 mm ear-cup interface. A balanced 4.4 mm cable and 3.5 mm adapter are included. Warranty and support are handled through standard Moondrop channels and authorized retailers; nothing notably above industry average is advertised.

Rationality of Design Philosophy

\[\Large \text{0.8}\]

Moondrop’s engineering choices (FEA-optimized N55 magnets, 1.2 μm diaphragm, stress-balance scheme) are rational, measurement-driven paths to lower non-linear behavior and predictable tuning [2]. However, third-party data suggests sonic gains over the original are incremental and may be unit-dependent, tempering the realized outcome despite sound technical intent [1][2].

Advice

If you want a well-built, easy-to-drive planar with balanced tonality and minimal EQ fuss, the Para II is a safe pick. If your priority is value per measurable performance, consider the HiFiMAN Edition XS at 269 USD as a baseline comparator; it offers similar user-facing performance for less [3][4]. For users sensitive to treble grain or seeking more bass impact, pad rolling (Para II/Cosmo pads) or modest EQ—as documented by third-party testing—can help [1].

References

[1] UnheardLab — “Moondrop Para II review: where’s the upgrade?” — https://unheardlab.com/2025/08/05/moondrop-para-ii-review-wheres-the-upgrade/ — Aug 2025 — THD (94 dB SPL) ~0.2–0.5% @1.5–8 kHz; unit variance noted; impedance flat ~9 Ω; sensitivity ~110 dB/Vrms.
[2] Moondrop — “MOONDROP PARA2 Full-size Planar Headphone” (official specs/features) — https://moondroplab.com/en/products/para2 — accessed Sep 1 2025 — 1.2 μm diaphragm, N55 magnets (FEA), THD ≤ 0.03% @1 kHz/94 dB, 9 Ω, 106 dB/Vrms, accessories.
[3] HiFiMAN (official mobile page) — “Edition XS” — https://m.hifiman.com/products/detail/315 — accessed Sep 1 2025 — Price 269 USD (specs: 18 Ω, 92 dB, 8 Hz–50 kHz).
[4] RTINGS — “HiFiMan Edition XS Review” — https://www.rtings.com/headphones/reviews/hifiman/edition-xs — updated Apr–Aug 2025 — Harmonic Distortion test results and methodology (APx517B test bench).
[5] Apos Audio — “Moondrop Para 2 100 mm Planar Magnetic Full-Size Headphone” — https://apos.audio/products/moondrop-para-2-100mm-planar-magnetic-full-size-headphone — accessed Sep 1 2025 — Price 499.99 USD; package contents.

(2025.9.1)