Hifiman HE1000 Stealth

HiFi, OpenBack
Hifiman HE1000 Stealth — The Flagship Planar Made Invisible

The original HE1000 put Hifiman on the flagship map; the Stealth Magnet version is the one that finally sorted out the diffraction problems that came with the territory. Swap the visible metal magnet arrays for acoustically transparent ones either side of a nanometre-thin diaphragm and, on paper at least, you get all the resolution with none of the comb-filtering side effects. In the ear it’s one of the most complete-sounding planars I’ve spent time with.

Build & Design

The Stealth keeps Hifiman’s familiar oversized oval earcups and self-adjusting suspension headband, now hiding its magnet structure behind a mesh grille rather than the visible metal bars of earlier HE1000s — the “stealth” in the name. At 458g it’s substantial, but the low clamping force and generous pads spread that weight well for long sessions; it’s the sheer footprint on a smaller head that reviewers flag rather than outright discomfort. Rated at 32Ω and 93dB sensitivity it’s technically easy to drive, but Hifiman notes the amp feeding it should have an output impedance under 4Ω or the frequency balance tilts rather than simply getting quieter — a headphone that rewards a considered source far more than the numbers suggest.

Sound

Bass

Fuller and more present than the standard, non-Stealth version — extension and texture are both a clear step up, though it stays controlled rather than warm or bloomy.

Mids

Clean, neutral and thick with detail; vocals have real body without the diaphragm ever drawing attention to itself. This is a headphone that gets out of the way of the recording.

Treble

Reviewers describe the tuning as leaning bright and analytical on paper, but in practice the treble is smooth rather than sharp — extended and resolving without turning splashy or fatiguing.

Soundstage & Imaging

Wide and genuinely three-dimensional, with layering and depth that move noticeably with amplification — feed it more current and the stage opens up further still. Imaging precision is exceptional; this is a headphone built to disappear instruments into specific points in space.

Comparisons

Against my Hifiman Arya, the HE1000 Stealth is the clear step up in coherence and resolution rather than a night-and-day retuning — same house sound, more of everything, worth the jump if budget stretches. Against my Audeze LCD-X, the contrast is more of character: the LCD-X denser and more visceral through the bass, the HE1000 Stealth airier and wider-staged. Fed from my RME ADI-2, whose low output impedance suits it well, it’s resolving enough to expose weak recordings — Headfonia and TechPowerUp both landed on “flagship-calibre at a lower price” than the Susvara tier, and I agree.

Verdict

Pros

  • Stealth Magnet design solves the diffraction issues of earlier HE1000s
  • Genuinely resolving, three-dimensional soundstage that scales with better amping
  • Comfortable weight distribution despite the size
  • Real step up in coherence over the Arya

Cons

  • Still a big, oval-shaped headphone — not for smaller heads or glasses wearers
  • Wants a low-output-impedance amp to sound its best; picky about matching
  • Price puts it well above mainstream open-backs
  • Not remotely portable — desk-only territory

Ratings:

  • Build & Design: 8.5 / 10
  • Sound: 9.5 / 10
  • Comfort: 7.5 / 10
  • Value: 8 / 10

The HE1000 Stealth is the headphone that made me stop describing Hifiman’s flagship tier as “Susvara or nothing” — this is genuinely close enough to matter, for a lot less money.