By aspect — in detail
Broadly agreed and broadly praised: a neutral, mid-forward 'new-school Audeze' voicing that deliberately breaks from the brand's old warm-and-dark sound, and that reviewer after reviewer likens to a planar HD650/HD600. Several call it one of Audeze's best-tuned headphones. The one live argument — how hot the upper mids run — sits under the midrange below.
“This is the best frequency response tuning I have yet heard in a planar magnetic headphone.”
den-fi (Master of None)
“this headphone is the closest in tuning to the legendary Sennheiser HD650 and HD600 series of old”
headphones.com (Andrew Park / Resolve)
Measured
RTINGS reads the signature as 'Flat' with bass and treble each 'Slightly Underemphasized (-3 dB)'; Resolve's GRAS 43AG measurement (vs combined Harman) shows a generally neutral-to-mid-forward tilt with a slight 3 kHz emphasis and full bass extension to 20 Hz — a deliberate, controlled tuning rather than a coloured one.
Nearly everyone measures and hears the same thing — a near-linear, quantitatively light low end that extends fully to 20 Hz and stays tight and clean — but they split hard on whether that's a feature or a flaw. One camp calls it clean, controlled and reference-correct; another calls it mediocre, soft or outright bass-light without EQ. The divide tracks whether you want a reference tool or a satisfying listen, and how much you'll EQ.
Measured
RTINGS reads bass as 'Slightly Underemphasized (-3 dB)'; Resolve measures full extension to 20 Hz with a slight ~200 Hz warmth; den-fi measures it linear into the infrabass. The quantity is genuinely light and the extension genuinely full — so 'clean and reference-correct' and 'thin without EQ' describe the same measured low end from opposite tastes.
⚠ vs. listeners — The graph is a near-linear, lightly-tuned bass with real sub-bass extension. Whether that lands as 'clean and controlled' or 'mediocre and bass-light' is preference and use-case, not a measured difference — and an owner used to boosted bass literally heard 'no bass' on Audeze's own store.
Where it splits
Clean, tight and extends to 20 Hz — a lean but reference-correct low end.55%
“The first of which is the full bass extension down to 20hz you see here, which is great.”
headphones.com (Andrew Park / Resolve)
The centerpiece — a forward, rich, HD650-reminiscent midrange most reviewers name as the best thing about the MM-500 — and also the single most-argued region. The fight is the upper-mid/3 kHz energy: a large camp hears it as occasional glare or shout, especially on female vocals, while another hears the tuning as perfectly balanced with nothing sticking out. It tracks ear anatomy, source and recording.
Measured
Resolve's GRAS graph shows a mid-forward tuning with a slight 3 kHz emphasis; den-fi puts the peak right at 3 kHz with less 4–5 kHz energy than the HD6x0/LCD-5. The mid-forward character and the ~3 kHz lift are measured facts; whether the lift 'glares' or sounds 'spot on' is where listeners diverge.
Where it splits
Upper mids run hot — occasional glare/shout, especially on female vocals.72%
“On certain recordings, the emphasis to the upper mids can cause a slight amount of glare, and if you think you’re sensitive to this region, that’s definitely something to keep in mind.”
headphones.com (Andrew Park / Resolve)
Perfectly balanced — nothing stands out.28%
“Manny Marroquin’s tuning is truly spot on as I could barely detect any one area of the frequency band standing out from the rest.”
Headphone Guru
Mostly agreed as smooth, relaxed and well-extended — an easy, non-fatiguing top end that softens sibilants, which most reviewers appreciate. The caveat is a minority, mixing-minded view that it's too smooth or dark: a recessed mid-treble and a dip through the upper treble can dull cymbals and, for pro work, hide detail.
“I also find the treble uncolored in any way, resulting in a sound that is amazingly neutral and lifelike.”
Ear Fidelity (Paweł Szachno)
“an inoffensive, if somewhat dull, treble response”
headphones.com (A Critical Take)
Measured
RTINGS: 'The treble region features a slight low-treble emphasis coupled with mid-treble de-emphasis, retaining detail and articulation in vocals and instruments while softening sibilants.' The Critical Take hears a valley from ~8–14 kHz that kills cymbal crash — so 'smooth and non-fatiguing' and 'somewhat dull' are the same relaxed top end described from opposite priorities.
Solid resolution that most place near the LCD-X 2021 and clearly a step below true flagships like the LCD-5. Enthusiast reviewers call the detail-retrieval outstanding; measurement-minded critics find it 'smoothed over' and unremarkable for a $1,700 headphone, partly a function of the softened transients and relaxed treble.
“The ability of these headphones to dig down deep into the recording and pull out the smallest nuances and details was truly astounding”
Headphone Guru
“somewhat unremarkable for its overall technical performance, especially at its hefty $1700 price point.”
headphones.com (A Critical Take)
Measured
Resolve places its resolution 'in a similar league as that of the LCD-X 2021' and below the LCD-5; den-fi hears softened, slightly smudged transients. The technical performance is competent but not class-leading — the rave and the 'unremarkable' both describe a solid, non-flagship resolver.
Soundstage
Moderate · 8 srcThe most consistent knock, though a mild one: for an open-back at this price the stage is widely called small, intimate and forward — accurate and 'intentional' for near-field studio work rather than spacious. The lone dissent is a reviewer who heard it as notably opened-up versus the LCD-X.
“the overall size of the soundstage is rather small, when compared to some of its competitors, but I actually believe that it was intentional.”
Ear Fidelity (Paweł Szachno)
“I’d describe the MM-500’s soundstage as nothing more than ‘acceptable’”
headphones.com (Andrew Park / Resolve)
Measured
A perceptual, not measured, verdict: the forward, mid-centric presentation pulls the image close and centered. Most (Ear Fidelity, Resolve, den-fi, both Reddit impressions) land on 'intimate but accurate'; Headphone Guru's 'expansive vs the LCD-X' is the minority read.
Generally a strength: precise placement and excellent left/right matching that reviewers credit for studio and gaming localization. A minority find it less than pinpoint in dense passages, but the recurring note is clean, incremental positioning.
“it images with precise, incremental gradations of position without any smearing or blobbing going on”
headphones.com (Andrew Park / Resolve)
“Imaging is not the sharpest.”
r/headphones (Feilong4)
Measured
RTINGS finds 'very good stereo matching and excellent harmonic distortion performance,' which underpins the precise localization reviewers describe; the disagreement is over perceived depth, partly a function of the intimate stage rather than a measured flaw.
Dynamics
Contested · 6 srcA genuine split. Most reviewers — including the measurement-minded ones — call slam and macro-dynamics merely okay, a byproduct of the relaxed treble and linear bass; a minority hear the tuning as engaging and punchy. Note-weight and speed are agreed; big, contrasty impact is not.
Measured
No dynamics metric settles this: the relaxed treble and linear, light bass make the slam read as soft to the majority (Resolve: 'not the MM-500's strength'), while Headphone Guru and Headfonics ('high-energy tuning') hear the forward, fast presentation as lively. It tracks how much you weigh technical impact vs subjective engagement.
Where it splits
Merely okay — not a big, slammy or weighty headphone.66%
“This isn't an especially big, contrasty, slammy, or weighty headphone.”
den-fi (Master of None)
Engaging and punchy — never boring.34%
“thanks to the brilliant dynamics, bass and overall transparency you will never find the presentation as boring or dull”
Headphone Guru
Everyone agrees it's lighter than the old LCDs (~495–500 g) with a suspension strap and plush pads — the argument is the clamp. One camp finds it too strong, fatiguing after about an hour and worst on larger heads; another finds it comfortable, more so than its siblings, and says it eases with break-in and a little headband-bending. It tracks head size and patience.
Measured
About 495 g (Audeze spec; reviewers measured ~500 g, Resolve's spec list says 528 g) on a spring-steel, suspension-strap headband you can bend to loosen the clamp; pads are smaller than older Audeze cups. The clamp is real and constant, so whether it fatigues you tracks head shape, session length and break-in — Ear Fidelity calls it 'quite brutal,' an owner says it's a non-issue after ~300 hours.
Where it splits
Comfortable — lighter than the siblings, and it eases in.32%
“Smaller, lighter and more comfortable on my head were the top 3 things that initially struck me.”
Headphone Guru
Two different questions. On materials, finish and feel, the verdict is near-unanimous — aluminium and spring steel, a superb low-microphonics cable and a protective hard case, repeatedly called a class benchmark. On long-term reliability, there's a serious dissent: a multi-unit, multi-year owner reports repeated driver/screw failures and slow service, and Audeze has since moved the MM-500 to legacy status.
Measured
Aluminium chassis and yokes, steel headband, machined parts; 3-year driver / 1-year everything-else warranty. The fit-and-finish praise is genuine and universal; the reliability warning comes from one credible long-term owner (four of five units failed, 2–5 month RMAs) and is echoed contextually by Audeze quietly discontinuing the model — a small but serious minority signal, not the majority experience.
Isolation
Strong consensus · 3 srcOpen-back by design: essentially no passive isolation, and it leaks freely both ways. Expected for the type and not treated as a flaw — but it rules out offices, commutes and shared rooms.
Measured
Fully open-back (RTINGS classifies it Open-Back with a leakage measurement) — negligible isolation and free leakage in both directions, by design; every source treats it as an open headphone for a quiet room.
Genuinely split. To one camp the benchmark build, the well-judged reference tuning and the studio pedigree make $1,699 fair, even a technical marvel for the price. To the other it's overpriced for the sound — the cheaper LCD-X 2021, HiFiMan Arya and the HD6x0 are said to match or beat it on pure sound, and its slam, stage and stock bass don't scream flagship. The split tracks whether you weigh build-and-tuning or sound-per-dollar.
Measured
$1,699 at launch (now often ~$1,499 as stock winds down), cross-shopped against the cheaper LCD-X 2021 (~$1,199), HiFiMan Arya and the Sennheiser HD6x0. The made-in-USA build and reference tuning strengthen the case; the modest dynamics, intimate stage and lean stock bass pressure it on sound-per-dollar.
Where it splits
Worth it — the build and tuning punch above the price.54%
“I honestly have trouble thinking of any planar that's this well rounded for my taste”
den-fi (Master of None)
Overpriced for the sound — cheaper rivals match it.46%
“the LCD-X 2021 and Arya Stealth still represent better overall value when it comes to sound quality”
headphones.com (Andrew Park / Resolve)
