HeadphoneOverreview

Dan Clark Audio Expanse

The best-measuring open-back one lab had ever tested — and the graph still doesn't settle the argument.

84/ 100
Review score
14 sourcesUpdated
$4,500Typical US price

Score aggregates reviewer opinions across topics.

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Dan Clark Audio Expanse

The short version

What to know.

An open-back planar flagship whose objective case is close to settled and whose subjective one is not. Sources agree almost without exception on long-session comfort, build, very low distortion, resolution, and a tuning that sits close to the common targets; they also agree it needs a genuinely powerful amplifier before any of that arrives. They split on space and on the top end: soundstage draws three distinct readings, treble divides over whether its smoothness costs air, and one deliberate mid-bass lift near 175 Hz — which the maker publishes an EQ to undo — accounts for most of the bass disagreement. Several reviewers note the fit itself is a variable, and the headphone ships with positioning instructions for that reason.

About this product

The open-back flagship. It shares its 4th-generation 76 × 51 mm V-Planar driver and the AMTS waveguide with the closed-back STEALTH but is voiced differently — richer upper bass and lower midrange — and the two are sold as co-flagships, not as a pair of the same headphone. Not the older ETHER 2 or ETHER C Flow it replaced at the top of the open line, and not the cheaper AMTS-equipped E3 or Noire X.

Dan Clark Audio's Expanse arrived in September 2022 as the open-back companion to the closed-back STEALTH: the same fourth-generation planar driver, the same Acoustic Metamaterial Tuning System sitting between driver and ear, the same folding titanium frame, and the same $3,999 asking price. It now lists at $4,499.99.

It landed with an unusual objective reputation — measurement outlets read it as one of the most target-compliant open-backs ever put on a rig — and an unusually divided subjective one. That gap between what the graphs promise and what some listeners report is the most interesting thing about it, and it is the thing most single reviews can't show you.

A good fit for

  • Listeners who want target-accurate tuning and top-tier resolution without a bright top end
  • Long sessions — this is one of the most comfortable full-size headphones anyone here has worn
  • People who already own a powerful desktop amplifier, or will buy one
  • Anyone who wants an open-back that does not broadcast to the whole room

Think twice if

  • You want sub-bass rumble and physical slam more than accuracy
  • You chase air and sparkle at the top of the treble
  • You want the widest possible stage — several reviewers rank rivals ahead on width
  • Your source is a portable or a modest desktop amp, and upgrading it isn't in the budget

The reviewer consensus

Agreement &
disagreement.

5 / 12topics divide opinion
tonalityimagingdetailcomfortbuildisolationdynamicsbassmidstreblesoundstagevalue
6 Strong agreement1 Mostly agree5 Divided opinions

Common ground6

  • Sits unusually close to the common over-ear targets — the objective tuning case is about as settled as it gets
  • Resolution and low-level detail are top-of-class; several reviewers reach for electrostatics as the comparison
  • Distortion is low enough that it ran into the measuring analyser's noise floor rather than its own limits

Points of contention5

  • Soundstage divides three ways: enveloping, big-but-not-the-widest, or flat and left-centre-right
  • Treble splits on whether the AMTS smoothness costs air at the very top
  • The midrange reads as forward-but-natural to most and as shouty to one measurement-led dissenter

A closer listen.

12 topics · 5 divided
Left: criticalRight: positiveTighter lines: more agreement

Tonality

PositiveStrong agreement
Reviewer sentiment9 supporting sources
CriticalNeutralPositive

Band: opinion spread · Dot: weighted average

The most-agreed point in the whole field: measured against the common over-ear targets this sits unusually close, and listeners describe it as balanced rather than neutral — full, slightly warm of flat, with a deliberate lift low in the midrange.

“compliance to the target is the best of any open-back headphone that I have tested”

amirm, Audio Science Review

“The EXPANSE is not your typical neutrally tuned flagship headphone, but it is balanced in presentation, close to the Harman curve.”

Lieven, Headfonia

“Probably does not need EQ.”

Maiky76, Audio Science Review

Measured

Four rig readings across three labs agree on the shape: ASR's bench, Resolve's GRAS 43AG-7 (RA0402 ear sim, KB5000 pinna) and his Brüel & Kjær 5128, and Head-Fi HQ's own 5128 with an APx555. ASR's preference-score pass reads 76.1 unequalised and 90.4 with EQ — a gap small enough that Maiky76 concludes it does not need any.

Link to this topic

Follow the evidence

Sources 14

1–6 of 14 sources

Read with context

Limitations & method.

As of

What to keep in mind 6

  1. A read of where the reviews land as of August 2026 — most of them were written in 2022 at the $3,999 launch price, and the headphone now lists at $4,499.99, so the value verdicts were formed against a cheaper number.

  2. How this one sounds to you depends more than usual on where your ear sits inside the cup. The pads are deep, the headphone ships with positioning instructions, and reviewers who followed them still reported different results.

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