Audio-Technica ATH-M20x

Sources split: most describe a balanced, neutral-leaning tuning that's good enough to track and monitor on — Sonarworks ranked it among the most neutral closed-backs it had measured. A smaller group says it simply isn't flat: the missing low bass and the hole around 5 kHz colour it enough that mix decisions in those ranges go wrong, and a few listeners found it thin or 'like an old radio'.

Sources split: most hear it as light or missing low end — quiet toms and bass guitar, little rumble, wrong for bass-heavy music. A sizeable minority hear the opposite: warm, punchy, even boosted bass. The graphs show both: a modest mid-bass lift above a steep sub-bass roll-off. Which one a listener notices depends on their music and on the seal of the shallow pleather pads.

Sources split, though one side is much larger: most call the midrange natural, present and the best part of the headphone — vocals and instruments come through with body. A minority hear a hollow lower midrange under forward upper mids, which makes rock sound tinny or the whole thing 'like an old radio'.

Sources split three ways. The largest group finds the treble relaxed and inoffensive — no piercing peaks, safe at high monitoring levels. A second group calls it veiled: missing the presence and sparkle that carry vocal harmonics and cymbals, and hiding sibilance you'd want to catch. A third hears it as uneven or occasionally harsh. All three line up with the same measured hole-then-spike.

Moderate agreement that resolution is basic. Reviewers who address it describe surface-level detail and a lack of the clarity that carries vocal harmonics and speech intelligibility. Several tie this directly to the dip around 5 kHz rather than to the driver itself.

“Perhaps absent is some of that perceived extra clarity that more volume to frequencies at and above 7kHz would supply.”

SoundGuys (Jasper Lastoria)

“Detail retrieval is surface-level, transients are blunted”

Head-Fi (Vanillacones)

Moderate agreement that it lacks punch and energy: kick drums soft, bass lines smeared, game audio 'weak'. Bonedo is the one dissent, praising quick, well-defined transients.

“Kick drums sound soft and pillowy instead of tight and impactful.”

Head-Fi (Vanillacones)

“lacked a bit of thump and energy for my taste but it was adequate”

r/Beatmatch (u/QuerulousPanda)

Sources split: two reviews find the stage surprisingly open for a cheap closed-back; three find it modest, close and congested, with mixes sounding dense and 'direct'. Channel matching measures well; the complaints are about how small and close the space feels.

Sources split, and the split follows head size, ear size and glasses. The light 190 g frame and well-padded headband win praise, and many wear it for hours. But the pleather pads are stiff and shallow, the cups are small for large ears, and the clamp bothers some heads: reports of discomfort range from 'after an hour or two' to 'within minutes'. It's the one topic Amazon owners mention more negatively than positively. Some owners and one reviewer get around it with a pad swap.

Sources split on whether 'cheap-feeling' means 'fragile'. One camp says it holds up well for the money — owners report years of daily use. The larger camp points to the light plastic, a headband that is plugged rather than screwed together, wires exposed between headband and cups, creaks, pleather that cracks within a year, and a fixed cable you can't replace. Two owners also say recent units feel flimsier than early ones.

Sources split: a minority find it isolates well for a closed-back — quiet enough to drown out a mechanical keyboard. Most measurement outlets and studio reviewers rate it poor to average, particularly in the bass, and say it lets live drums and room noise through. Amazon owners lean positive. The light clamp, stiff pads and glasses all weaken the seal.

The closest thing to a consensus: at around $50 most sources call it one of the best studio headphones you can buy, and one owner couldn't hear a big difference from the M40x side by side. The dissent is about the alternatives: a few say other cheap headphones or IEMs sound better, or that it's only a bargain on sale, and several point out the M30x or M40x as a worthwhile step up.

“This is a very serious tool for a very affordable price. Value is superb!”

Sonarworks

“Newcomer finden in dieser Preisklasse wenig Alternativen, die besser klingen.”

kopfhoerer.de (Jan Bruhnke) — “newcomers will find few alternatives in this price class that sound better”

“Now I see them at $60 to $70 and think they'd still be a great value if they could be found at $40 or less.”

r/HeadphoneAdvice (u/Origami_Avatar)