Audeze MM-100

Sources split, but not about what the headphone measures — about whether the shape works. Everyone describes the same voicing: mid-forward, linear in the bass, subdued on average up top, with a marked 2–3 kHz lift. One camp calls that an honest, near-neutral reference tuning in the new post-LCD-5 Audeze idiom. The other calls it thin and shouty, and says the peaks and dips are too uneven to be a monitoring tool. Note who is on each side: the split does not track measurement-versus-listening, it tracks taste.

The low end runs flat from the midrange down into the sub-bass with no shelf at all — every rig measures it and every reviewer hears it. The argument is only about quantity. To one camp that flatness is the point: clean, tight, well-extended and correct for a reference tool. To the other it is simply not enough bass, with sub-bass that barely registers. Almost everyone who takes the second view fixes it with a gentle low shelf, which the very low distortion makes easy.

The defining region, and the sharpest fight. Everyone agrees the midrange is pushed forward by a lift around 2–3 kHz, and that vocals sit close and clear as a result. Reviewers doing pro work and enthusiasts who like an intimate vocal call it the headphone's best quality — intelligibility that makes mix problems obvious. The other camp hears the same lift as aggression: shouty, dry, artificially sharpened, and made stranger by a dip at 2 kHz that sits right beside it.

The most interesting disagreement here, because both camps are describing the same curve — just different octaves of it. Below, a deep dip through the 4–6 kHz presence region takes the edge off percussion and all but eliminates sibilance, which is why several reviewers and most owners describe the treble as smooth, dark and completely non-fatiguing. Above it, narrow peaks around 6, 8 and 10–12 kHz ride on top of an otherwise low top end, which is why another group hears hiss, lisp and thin, tinny cymbals. Which one you get depends on your ears and your material, not on your unit.

The clearest weak point, though not a unanimous one. Most sources describe a small, centred, in-your-head presentation with limited width and little depth — one measurer calls it almost claustrophobic, another describes elements collapsing into three blobs rather than spreading across a field. A minority finds it perfectly adequate for the money, and one retail-affiliated outlet calls it holographic, which no one else does. Headfonics notes width and separation improve with a balanced cable and a stronger amp.

Consistently well regarded, and worth separating from the small stage. Within that narrow space, placement is precise and the centre image is solid — several reviewers who dislike the tuning still single out the imaging. The caveat is layering rather than direction: on dense material instruments can crowd, and depth is less convincing than left-to-right placement.

“Imaging, however, is extremely precise, and on most tracks it is very easy to tell which direction and where in the soundstage an instrument is.”

Head-Fi (bluranerd)

“What I really like is the stereo and left/right imaging, as well as the energetic, slightly forward vocal tuning.”

Headfonia (Lieven Vranken)

Solid rather than remarkable, and helped by genuinely low distortion. Clarity in the midrange is the strong point — acoustic guitars, male vocals and mix faults all come through plainly, which is the whole point of a monitoring headphone. Several reviewers note that the uneven treble can read as extra detail without actually being it, and owners coming from other studio references find it a little less resolving than expected.

“The MM100 offers commendable clarity and resolution, particularly for the midrange sounds, like acoustic guitars and male vocals.”

unheardlab

“Less detailed sound than some other studio reference headphones”

Head-Fi (jeromeoflaherty)

Split, and the split is about macro versus micro. One camp hears unusually crisp transient attack and more textural contrast than pricier planars manage — headphones.com argues the rocky upper midrange is precisely what generates it. The other hears everything arriving at the same level: quiet detail pushed forward, loud detail held back, a wall rather than a landscape. That flattening is arguably useful for spotting mix errors and unhelpful for enjoying music.

The most stubbornly divided aspect, and the one to try before you buy. The headband offers exactly three positions per side, fixed by screws, so the fit either lands on your head or it does not — and reviewers do not even agree on how hard it clamps. Some report near-zero clamp and a wobbly, insecure fit with the full 475 g hanging off a narrow strap; another reports clamping strong enough to make his ears ache in fifteen minutes, with the Fazor grille touching his ears. Others wear it for hours without a thought. The pleather-over-gel pads are glued in, so pad-swapping is not a fix.

Broadly the headphone's least controversial strength. Magnesium yokes and grilles, a spring-steel headband, hand assembly in California and a chassis several reviewers say belongs at a higher price. The either-cup 3.5 mm entry is genuinely useful at a desk, though the shared internal wiring means most aftermarket cables will not work. The dissent is comparative rather than about failures: headphones.com finds it flimsy next to a Sennheiser HD 600, and the cost cuts are visible in the glued pads, the plain cable and the pouch instead of a case.

“the Audeze are considerably better built and more likely to be a durable, long-term option in the studio”

RTINGS (vs. HiFiMan Sundara)

“there are no obvious corners cut in build quality”

Sound On Sound (Sam Inglis)

“MM-100 is definitely heavier, but it’s also chintzier and feels less sturdy.”

headphones.com (Griffin Silver)

Fully open-back, so there is effectively none — sound leaves freely and the room comes in. Expected for the type and not treated as a flaw by anyone, but it does rule out offices, commutes and shared rooms.

“Isolation wise this of course is a fully open back headphone, so music will leak out and noise will leak in.”

Headfonia (Lieven Vranken)

The widest split in the whole file, and it turns on what you are comparing against. Measured against the MM-500, the MM-100 looks like a bargain — Sound On Sound reckons it delivers at least ninety percent of the sound for under a quarter of the cost, and at the current ~$299 street price several owners call it outstanding. Measured against the Sennheiser HD 600 and HD 650, the cheaper HiFiMan Sundara or the Aune AR5000, the critics say it simply loses. Nobody disputes that it needs EQ to be at its best, which is itself part of the argument.