SPECIFICATIONS

Spec	Value
Type	Over‑ear, open‑back planar magnetic headphones.
Driver Technology	Planar magnetic with Stealth Magnets and NEO “supernano” diaphragm (NsD). The NsD is ~80% thinner than previous diaphragms, aiming for faster response and more detailed sound.
Impedance	18 Ω — relatively low impedance for a planar, which helps make them easier to drive from modest sources.
Sensitivity	93.5 dB (Octave voltage sensitivity)
Frequency Response	20 Hz – 20 kHz
Weight	~ 360 g
Connectivity / Ports	- Wired version: dual‑entry 3.5 mm single‑ended TRS jack inputs (left + right), and a left‑side 3.5 mm balanced TRRS jack. - Wireless version includes a “Bluemini R2R” dongle/receiver module (for Bluetooth/USB etc.) to allow wireless operation. (Note: the version with the dongle is more expensive. Wired version omits the wireless module.)
Included Accessories (Wired version)	Usually comes with a 1.5 m cable, 3.5 mm plug cable (and adapter to 6.35 mm in many bundles), user guide, etc.
Sound Signature / Design Philosophy	Emphasis on reduced distortion (Stealth Magnets reduce diffraction / turbulence), transparent, full‑range sound, detailed high frequencies, good imaging due to open back design. Reviewers say the sound is “brighter side but not harsh,” with good detail and clarity.

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• The Stealth Magnet design is applauded — listeners report better clarity, less distortion especially in the treble / transients. 

• The NsD diaphragm gives faster temporal response, more lifelike transients. 

• Low impedance + decent sensitivity mean you don’t necessarily need a powerful amp for acceptable volume in wired mode. Easier to drive than many planars that require high voltage. 

• Open‑back spacious soundstage in well treated rooms; detail retrieval and imaging are generally good.

• Build and comfort are decent for the price: lightweight enough for extended listening; earpads and headband generally acceptable.

Active Noise-Cancellation: No

Brand Name: Hifiman

Category: Earphones & Headphones

Certification: CE

Communication: Wired

Connectors: 3.5 MM

Control Button: No

Earcups Type: Open-back

Frequency Response Range: 20 - 20000

Hign-concerned Chemical: None

Impedance Range: up to 32 Ω

Is wireless: No

Line Length: 1.5

Material: ABS

Number Of Drivers: 2

Plug Type: L Bending

Resistance: 18

Sensitivity: 93.5

Style: Wired in-ear headphones

Vocalism Principle: Orthodynamic

Volume Control: No

Waterproof: No

Wireless Type: Bluetooth