By aspect — in detail
Tonality
Contested · 12 srcSources split on what to call it, while broadly agreeing they like it. The larger camp describes a warm, dark-of-neutral voicing — bassy, forgiving, unmistakably the ZMF house sound. The smaller but heavily weighted camp, working from the same measurements, calls it the most genuinely neutral headphone in its peer group and reaches for the “super HD650” comparison that has followed the Atrium ever since. Both are describing a response that is even through the midrange and gently tilted down up top; they disagree about where neutral is.
Measured
The rigs do not actually disagree much. purr1n (flat-plate coupler and MiniDSP EARS) reads a slight mid-bass boost with muted lower and mid treble; Josh Mound's EARS measurement reads “slightly elevated mid-bass, a slight emphasis on the 3 kHz region, a gradual downward slope from there to 8 kHz”; Antdroid finds it “fairly neutral up until the upper-mids” with treble below his idea of neutral. Whether that shape is called warm or neutral depends on the reference the writer carries.
⚠ vs. listeners — Nobody is measuring something different. The same gentle downward tilt reads as a dark house sound to purr1n, Antdroid and Headphonesty and as textbook neutrality to Josh Mound, who explicitly treats the HD650 curve as the neutral reference. The disagreement is about the target, not the data.
Where it splits
Warm and dark of neutral — the ZMF house voicing, forgiving rather than accurate.70%
“In general, I would say that the Atrium is bassy and dark sounding headphone.”
Super Best Audio Friends (purr1n)
Essentially neutral — the most balanced of its price peers, and the long-awaited “super HD650”.30%
“The Atrium is the most truly neutral headphone out of the Vérité, the Utopia, and the HD6XX.”
Audiophile Style (Josh Mound)
Every source hears the same low end: a mid-bass lift, big physical slam, long natural decay, and sub-bass that is genuinely present but gently rolled at the very bottom. The argument is about quality, not quantity. One camp — led by the most thorough measurement write-up — calls it the cleanest and most textured bass in its company. The other says it is generous and fun but not the most technical at the price, softer and slower than a good planar, and short of true slam for some listeners.
Measured
purr1n's distortion sweeps put the Atrium below the HD650 under 80 Hz — about 10 dB lower at 20 Hz at the loudest level — with much lower third-harmonic distortion from 120 Hz upward, and his 10-cycle burst at 50 Hz starts early and squares off with neither overshoot nor undershoot. Josh Mound independently finds second-harmonic distortion dominant across the band including the bass, where the Vérité and Utopia have competing third-order. Takarajima's warble-tone test heard mild humps around 80 and 100 Hz, easy audibility down to 40 Hz, and 20–25 Hz audible but only with concentration.
⚠ vs. listeners — The measurements favour the first camp on quality and the second on extension: distortion really is low and second-harmonic-dominant, which is what “clean” sounds like, while the last octave really does taper. Both readings hold at once: it really does slam without rumbling, and it really is the cleaner low end of the group.
Where it splits
Exceptionally clean and textured — the low end is a technical high point, not just a warm one.46%
“Instead, I’d venture to say that the Atrium’s bass may be subjectively the cleanest sounding of the three headphones.”
Audiophile Style (Josh Mound)
Generous and fun, but not the most technical bass at this price — soft where a planar would be tight.54%
“That said, it is not the most technical bass around this price range.”
Head-Fi (betula)
Mids
Strong consensus · 10 srcThe one thing nobody argues about. The midrange is described as the Atrium's reason for existing across every class of source — full-bodied, natural in timbre, with male vocals, piano and acoustic guitar singled out again and again. Unlike ZMF's Vérité there is little or no upper-midrange dip, which keeps voices present rather than set back. The only reservations are small and opposite: one reviewer finds higher-pitched vocals slightly smoothed, another finds the upper mids more forward than he likes.
“The mids are the biggest highlight of the Atrium.”
Headphonesty
“Vocals run like liquid honey: they are sweet, euphonic and tonally as lifelike as it gets.”
Head-Fi (betula)
“The Atrium is very much a ZMF-house tuning, with lush and natural mids that really carry the headphone.”
Audio Discourse (Antdroid)
Measured
purr1n, comparing it against the rest of the line: “Unlike the Verite, there doesn't seem to be as much of a upper-mid depression, if there is any at all.” That is the measured difference behind the Atrium's more present vocals. Josh Mound's EARS trace shows a mild emphasis around 3 kHz, though he notes the headphone does not subjectively sound upper-mid forward to him.
The headline disagreement, and the one with a physical explanation. The larger camp hears a deliberately de-emphasised top — smooth, entirely non-fatiguing, short on bite and air, with the muting concentrated somewhere between 7 and 10 kHz. A second camp says that reading is wrong or at least incomplete: there is real upper-treble air above 10 kHz, and an audible edge around 5–6 kHz that several owners describe as etched or intense. The split tracks two things nobody disputes — which mesh is fitted, and whether the rig used could see above 8 kHz at all.
Measured
Every independent rig used on the Atrium reads reliably only to roughly 8 kHz, which is precisely where the argument sits. Zach Mehrbach said so in the headphones.com model thread: “The upper treble around 8K+ is hard to get with anything but a HATS unit but it is there.” Antdroid, who publishes his own graphs, agreed a post later that his mic “is only good to about 8KHz or so”, and Josh Mound was warned about the same limitation before measuring. Within their working range the rigs broadly agree: purr1n finds a small 5 kHz peak, a 4 kHz dip and a 10–12 kHz mid-treble dip; Antdroid finds “a slight peak at 5KHz”; Headphonesty places the muting at 7–10 kHz with the response picking up again past 10 kHz. ZMF's own Brüel & Kjær 5128 measurements show content above 8 kHz that the cheaper fixtures cannot resolve.
⚠ vs. listeners — This is not a case of listeners contradicting the data — it is a case of the data stopping short. The octave that decides whether the Atrium is dark or airy is above the ceiling of the flat-plate, GRAS-type and MiniDSP EARS rigs that produced almost every published graph of it, so a graph showing the response fall away and a listener reporting plenty of air can both be honest. The swappable driver mesh compounds it: the stock solid mesh is the darkest option, the radial vented mesh lifts 5 kHz and above, and removing it lifts more still — so two reviewers can describe genuinely different headphones.
Where it splits
Deliberately dark — smooth and fatigue-free, but short on bite, sparkle and apparent resolution.63%
“The lower and mid treble are muted, although there's some decent air, at least with the Universe pads.”
Super Best Audio Friends (purr1n)
Not dark at all — there is genuine air up top, and a lower-treble edge some listeners find forward.37%
“However, it does sound to me like the Atrium has a good amount of upper-treble”
Audiophile Style (Josh Mound)
Genuinely contested, and the split does not follow the usual lines. One camp — including the most measurement-driven write-up — puts the Atrium's resolution level with ZMF's Vérité and calls detail retrieval a strength. The slightly larger one, including two editorial reviews and several owners in the forums, says it resolves well but is not the most resolving headphone at $2,500, and that a listener coming from an HD800 or a Utopia will notice. Both sides tend to add that the Atrium trades apparent detail for texture, and several sources link the perception directly to the muted mid treble.
Measured
Headphonesty ties the perception straight to the response: the mid-treble recession “results in a lack of resolving capacity”. Antdroid, measuring the same region, reaches the opposite conclusion — that despite what he could call a veil or grain, “detail still out clearly”. purr1n's CSD and burst-decay plots show fast, clean settling with an aggressive 4.8 kHz attack, which supports the higher reading.
⚠ vs. listeners — There is no resolution number to settle this. What can be said is that the two camps correlate with the treble camps: reviewers who hear the top end as muted also hear less detail, and those who hear air hear more. The likeliest reading is that perceived resolution here is largely a function of mid-treble level — which is exactly what the mesh and pad options change.
Where it splits
Resolution is a strength — Vérité-level, with detail carried by texture rather than treble emphasis.45%
“excellent soundstage (width and depth), superb detail retrieval, and class-leading microdynamics”
Audiophile Style (Josh Mound)
Resolves well but not top of its price class — noticeably behind an HD800 or Utopia for sheer detail.55%
“For example the Atrium is detailed enough for the price, just not the most detailed in its price range.”
Head-Fi (betula)
Dynamics
Contested · 10 srcMacrodynamics are one of the Atrium's least disputed strengths — sources reach for freight trains, sledgehammers and boxing metaphors, and the word “slam” appears in nearly every review. Microdynamics are the opposite: one reviewer calls them class-leading and the measurer puts them at Vérité level, while two others name them the headphone's weakest attribute. The configuration matters here more than anywhere — the reviewer who found microdynamics lacking also reports them improving with the vented mesh.
Measured
purr1n's 10-cycle burst envelopes show an aggressive attack at 4.8 kHz and a 50 Hz burst that starts early and squares off cleanly — behaviour he calls atypical for a ZMF and more like a Grado transient. Swapping the stock solid mesh for the radial vented one barely moves the frequency response but audibly changes the transient behaviour, which is his explicit point: “The frequency response really only tells us so much.”
⚠ vs. listeners — The two camps may not be describing the same configuration. Headphonesty found microdynamics improved with the vented mesh; purr1n measured and preferred the vented mesh throughout. If the reviewers who found fine detail lacking were on the darker stock mesh and those who found it excellent were not, the disagreement is a hardware difference rather than a difference of ears.
Where it splits
Fine detail and volume gradation are a strength — level with the Vérité, and class-leading to one reviewer.57%
“There are Verite level, so they play up there with respect to microdynamics and plankton.”
Super Best Audio Friends (purr1n)
Big slam, but the small gradations go missing — the weak point in an otherwise top-tier package.43%
“Microdynamics or subtle shifts in volume are not as well defined, sadly.”
Headphonesty
Soundstage
Moderate · 9 srcBroadly praised, and repeatedly called the most open-sounding ZMF made to that point — a direct result of the vented rear damping system. Sources describe genuine depth and layering rather than just width, with several placing it level with or ahead of the Vérité Open. The one dissent comes from a measurer who calls it medium-sized and smaller than the Vérité, which is worth weighing: it is not an HD800-class stage, and nobody claims it is.
“Staging is excellent on the Atrium. They are the most open-sounding ZMF I have listened to so far and they can render the atmosphere of a concert hall fairly well.”
Headphonesty
“Headstage is easily the equivalent of the Verite Open.”
Super Best Audio Friends (purr1n)
“The Atrium has a medium-sized soundstage, and isn't quite as large as Verite, but does not come off as collapsed, trapped-in or claustrophobic.”
Audio Discourse (Antdroid)
Measured
Not a measured quantity, but the mechanism is documented: the Atrium damping system vents and guides the driver's rear wave through the cup rather than letting it reflect, and it is the feature ZMF built the model around. Josh Mound measures the stage as slightly wider than either the Vérité Open or the Focal Utopia, with depth between the two.
Generally rated precise, with the three-dimensionality — instruments placed at different depths rather than just left to right — called out more often than raw pinpoint accuracy. Two reservations recur and are worth knowing: centre imaging is described as good rather than class-leading, and the one reviewer who tested placement against a reference clip found the directional cues less believable than he expected. Busy passages are also where a listener sensitive to the forward upper mids reports having to concentrate.
“These headphones also have excellent 3D imaging and soundstage depth thanks to the patented ADS system.”
Head-Fi (betula)
“For the most part, imaging is precise but center-imaging is not class-leading.”
Headphonesty
“While I like their crisp images, I am doubting if the imaging location is fully believable.”
Head-Fi (Takarajima)
Comfortable for most, despite real weight — 490 g before options, and up to about 545 g with copper grilles and thicker pads. The wide, well-padded headband with its inner suspension strap gets credit for spreading that load, and several reviewers report no hot spots over long sessions. The consistent caveat is the same weight after several hours, and one reviewer reports the opposite problem from clamp being too tight: too little of it, so the headphone can shift or slide if you look down. The headband adjustment is also described as notchy.
“Despite the noticeable weight of at least 490g (depending on wood and choice of grille), the Atrium are very comfortable to wear”
Headphonesty
“Perhaps due to the new headband, I never once felt as though they were too heavy. Nor did I develop a hot spot where the crown of my head touched the pad.”
Audiophile Style (Josh Mound)
“The Atrium is heavier so if you have a loose fitment, expect to have it slide around or possibly fall off if you tilt your head down.”
Head-Fi (corgifall)
Measured
ZMF's published weight is 490 g ± 30 g with the aluminium chassis and black grille and rods. The aged copper grille adds about 30 g and the magnesium chassis subtracts 34 g; Antdroid's copper-grille review unit weighed roughly 545 g with Universe pads fitted. The headband core is spring steel and can be bent to change clamping force.
Build
Strong consensus · 9 srcThe most emphatic agreement in the file. The Atrium is solid wood, metal and leather with no plastic in the structure, hand-finished in the Chicago area, with mini-XLR cable sockets, replaceable pads, a user-swappable driver mesh, a hard case, two cables and a lifetime driver warranty to the original owner. Reviewers with long histories of ZMF review units report never having received a defective one. The only recurring complaints are a notchy headband adjuster and, from buyers going through dealers, long waits.
“These are built to last, which is something I can’t say for many headphones in the Atrium’s price range.”
Audiophile Style (Josh Mound)
“In all my years of reviewing ZMF gear, I’ve never received a pair that arrived DOA or had any manufacturing issues of any type.”
audio-head
“The build quality is very much the best of the best and I’m impressed given its price is very much up there.”
Head-Fi (corgifall)
Measured
Published specification: 300 ohms, about 96 dB/mW, a biocellulose N52 “Atrium Tuned Driver”, cherry cups as stock, mini-XLR sockets, and a lifetime driver warranty to the original purchaser with a $250 driver replacement for secondhand owners.
Isolation
Moderate · 2 srcNone, by design — this is a heavily vented open-back and it leaks freely in both directions. One useful wrinkle: because most of the venting is around and behind the cup rather than straight through the grille, at least one reviewer found it lets noticeably less of the outside world in than a typical open-back, which makes it a little easier to live with in a shared room.
“Isolation is non-existent due to numerous vents and an open-acoustic design.”
Headphonesty
“This Atrium leaks a good amount of sound which is no surprise for an open back. It doesn’t let as much sound in overall though.”
Head-Fi (corgifall)
The widest split, and it turns on what you want for $2,499.99. The supporters argue that nothing else combines this midrange, this build and this degree of user tuning at any price, and one reviewer calls it the best headphone on the market outright. The sceptics point out that a headphone at this price is expected to be among the most resolving available and this one is not, and that the configuration options — pads, grilles, chassis, limited woods — quietly push the real spend well past list. Community sentiment sits at 74% positive, high but not the near-unanimity the editorial coverage suggests.
Measured
$2,499.99 direct from ZMF as of August 2026 — unchanged since the April 2022 launch, and the same price as the Vérité Open and the Atrium Closed, against $3,499 for the planar Caldera Open. Options add up: corgifall's configured review unit listed at $2,949.99. Used examples have recently traded around $1,850–$2,500. RedditRecs records 74% positive sentiment — 20 positive, 3 neutral and 4 negative users across 37 comments — and Head-Fi's ten member ratings average 4.60 out of 5, with the lowest at 3.50.
Where it splits
Worth it — a genuinely unique voicing plus heirloom build and lifetime support, unmatched at any price.65%
“But for most audiophiles — especially those who consider the HD650’s tuning to be neutral — the Atrium is the top option on the headphone market today.”
Audiophile Style (Josh Mound)
Hard to justify at $2,500 if you want maximum resolution — and the options inflate the price further.35%
“Not the most resolving headphones for the price”
Headphonesty
