Moondrop Cosmo HiFi Kopfhörer

Moondrop Cosmo — Flagship Open-Back Planar Magnetic Headphone

This flagship open-back planar magnetic headphone is built around a 100mm nanoscale ultra-thin diaphragm driven by a highly elastic pure silver etched circuit. The over-ear model pairs an N52 magnet array optimized through finite element analysis with a tension-balanced diaphragm, extending frequency response from 13 Hz up to 58 kHz. The Cosmo is the right choice for listeners who want a relaxed, vocal-forward planar sound with deep bass extension.

What Sets the Cosmo Apart

Two engineering choices distinguish this model from typical planar magnetic designs. The diaphragm uses Full Drive Technology, so the entire vibrating surface is evenly covered by the conductive circuit inside a uniform magnetic field — reducing split vibration and approaching electrostatic-level control. A three-dimensional high-frequency phase control waveguide sits on both sides of the driver, lowering phase cancellation so treble stays smooth and the soundstage opens up.

Technical Specifications

• Driver Type: 100mm Planar Magnetic (FDT) — oversized diaphragm for low distortion and full-surface drive
• Frequency Range: 13 Hz – 58 kHz (IEC61094 Free Field) — extended sub-bass and ultra-treble response
• Impedance: 15 Ohm ±15% — easy to drive from most headphone outputs
• Sensitivity: 100 dB/Vrms (@1 kHz) — reaches comfortable volume without a powerhouse amp
• Construction: Open-back over-ear — open grille design for a spacious, breathable soundstage
• Cable & Connectors: 4.4mm balanced single-crystal copper cable, dual 3.5mm headphone-side inputs, 4.4mm-to-6.35mm adapter included

Who the Cosmo Is For

The Cosmo suits audiophiles and home listeners who already own a competent desktop amplifier or balanced-output DAP and want a planar magnetic headphone that delivers vocal clarity, micro-contrast texture, and a relaxed midrange without the aggressive treble of typical planars. It pairs well with carefully recorded music — vocals, jazz, acoustic, and well-produced electronic music benefit from the easy, midrange-forward tuning reviewers describe as exceedingly pleasant.

Moondrop's Flagship Headphone Story

Moondrop entered the over-ear headphone category about two years before the Cosmo's release, and this third planar model is widely regarded as the one where the brand's headphone engineering finally came together.