Dan Clark Audio AEON 2 Noire

Measured

Eight rigs agree on the shape. Against oratory1990's Harman over-ear 2018 target the curve runs about +2.4 dB at 80–150 Hz, 2–4 dB short through 1.5–4 kHz and about 5.5 dB short at 8–10 kHz, close elsewhere. Diffed against each rig's own HD 600, every rig shows far more sub-bass (+5 to +13 dB at 20–40 Hz), a 100 Hz lift and a dip through 2.5–4 kHz. RTINGS files it Bass Amount “Slightly Emphasized (2 dB)”, Treble Amount “Balanced (0 dB)”, Sound Signature “Balanced”. DCA's own page says the tuning “almost exactly aligns to the “Harman Curve,” gently boosting bass and treble compared to ÆON 2 Closed”, with a deliberately “lighter” midrange.

Measured

Every GRAS-class rig (oratory1990, Crinacle, Unheard Lab, CammyFi) puts a peak at 5.5–5.8 kHz; above 10 kHz the rigs spread by about 9 dB against their own HD 600s, and Earphones Archive's B&K 5128 moves the peak up to 6–8 kHz. RTINGS reports “some sharp peaks in the mid and high treble can introduce some extra sibilance and hiss into vocals and cymbals”. The filters do what they claim: on Earphones Archive's rig the one-notch white filter trims 4–6 kHz by about 2 dB and 10–14 kHz by about 4 dB. Dan Clark himself told ASR that the treble emphasis amirm measured, with no filter fitted, “was actually not expected to be the way most people would listen to it”.

vs. listeners — The bench and the ear are not quite judging the same headphone: ASR measured with no filter fitted, most owners settle on one, and Resolve — who measured it and liked it unfiltered — found the filters “incrementally destructive for microdynamics/microdetail”. Rigs also disagree most exactly where the complaints sit (above ~8 kHz), so a listener's own ear canal decides how hot the top octave lands. The successor is a tacit admission: Bloom Audio says “the upper regions in Noire X are less peaky”.

Measured

On every rig the bass sits 3–4 dB above an HD 600 at 80–150 Hz and far above it in the deep bass; RTINGS calls it “Slightly Emphasized (2 dB)” and ASR found “expected bass response (and a bit more)”. The fixture is not the head, though: Resolve's in-ear microphones showed it “seems to roll-off in the sub-bass slightly when being worn on the head”, and RTINGS scores frequency-response consistency poorly because “other head sizes or features like long hair or glasses will affect the seal and consequently the bass response”. Headfonia found it “will happily accept a 3-4dB bass-shelf below 120Hz without any sense of distortion creeping in”.

Measured

Four of five rigs put 2.5–4 kHz 5–8 dB below their own HD 600 (Unheard Lab is the exception at about −1 dB), and the perforated pads are what lift it: CammyFi's non-perforated file sits another ~3 dB lower there. DCA's page frames the result as “a “lighter” sounding midrange”. Bloom Audio, reviewing the successor, names the shouty minority directly: “where Aeon 2 Noire had a tendency for shouty vocals with some tracks, Noire X cleans up the shoutiness”.

vs. listeners — The dip that defines the argument is rig-dependent. Resolve's GRAS and B&K 5128 measurements of the same unit disagree there — a forum member pointed out that “the prominent dip at 3.5khz on the Gras” was absent on the B&K, and Resolve answered that “headphones behave differently on different heads”. How recessed the presence region sounds depends partly on the listener's own ears.

Measured

There is no stage measurement, but the mechanism is on the record from both ends: DCA designed the perforated pads to move the stage “a bit further from the listener for a wider and deeper space”, and Headfonics hears “a more expansive airy soundstage over the original closed-back AEON 2”. RTINGS is cooler — they “don't offer a particularly immersive sound” — and amirm reads the 2–4 kHz shortfall the other way: “such a deficiencies robs you of spatial qualities”.

Measured

DCA specs the drivers “channel matched to 0.5dB weighted 30-8KHz”, and amirm found “great channel matching” on his unit. Above 5 kHz the picture is looser: Crinacle's, CammyFi's and Earphones Archive's units show 4–6 dB left/right differences in the top octaves, and RTINGS notes “some frequency response mismatch in the treble region, which can subtly shift this range to the right”.

Measured

DCA specs THD “less than 0.3% 20-20KHz, 0.1% 100-8KHz”; ASR found distortion “more than I am used to seeing” but “of less concern” given the bass level, while Resolve's calibrated distortion plot showed “Nothing particularly weird”. With his own EQ amirm reported “Detail was superb now” — the ceiling is not what is argued over, the tuning in front of it is.

Measured

The load explains why amplification matters: 13 Ω at about 90 dB/mW, which ASR measured as “half the sensitive of the median headphone” on an impedance that is “very low and flat which means your headphone amp better have good current delivery”; amirm's RME ADI-2 Pro was “just good enough”. Owners split on dongles — some run it happily from an Apple or Qudelix dongle at modest levels, others found a Qudelix 5K or FiiO K11 short of headroom.

vs. listeners — Power explains only part of the split: the slam complaints come from owners on desktop amps too, and Resolve says the lack of macrodynamics persists “even when EQ’d”. Comparisons cut both ways: Headfonia and Resolve find it restrained next to Focal's Radiance and Celestee, while Joshua Valour heard its bass hit harder than the Celestee's.

Measured

Headfonics weighs it at 327 g and kylebucksot at 337 g (DCA's own page gives both 328 g and 345 g). Headfonics calls it “one of the most comfortable circumaural planar magnetic headphones in the market right now, period”; DMS calls it “one of the most comfortable headphones on the planet”. The dissent is specific: kylebucksot could manage 30–45 minutes, an ASR owner found it “much too uncomfortable” within days, a Reddit owner got headaches or jaw-aches depending on how it sat, and a one-year owner reports it “puts more pressure on the lower jaw than any other headphone”. Several owners note the strap sliders loosening and the cups wandering.

Measured

RTINGS: “Their closed-back design is capable of attenuating some treble-range sounds, but you're still at the mercy of bass and mid-range sounds, like revving engines and honking horns.” Headfonia, the most measured of the listening reviews, lands between: “decent passive isolation, but nowhere near the level of something like the Beyerdynamic DT770 or Sennheiser HD-25”. Headfonics found the perforated pads left isolation “relatively unchanged” against the solid ones.

Measured

The failure record is broad: about eleven ASR members (2023–2026) and several Reddit owners report one cup going quiet, intermittent drop-outs or a measurable resistance mismatch, usually fixed under warranty. Dan Clark told the thread it “was a historical issue related to the original mechanism for getting contact to the driver”, “the biggest support issue for AEON”, and that the system was redesigned in early 2024. The folding mechanism is the standout on the other side — Headfonia calls it “surely the most ingeniously-designed folding mechanism on any pair of cans currently on the market”.

vs. listeners — Most reviews were written on 2021–2022 review loans and say nothing about reliability, because loan units don't fail in a review cycle; the failures surface in owner threads months or years later. DCA's 2024 redesign means older and used units carry the risk while new stock should not — and Dan Clark says the extended repair policy covers original purchasers.

Measured

DCA, Headphones.com, Bloom Audio and Audio46 all list it at $899.99; Amazon has it at $849 through a dealer, and owners report clearance pairs well below that. The Noire X sells for $989–$1,099. RTINGS supplies the sharpest value dissent: against the FiiO FT1, “Despite being a fraction of the price, the FIIO perform better in many sound-related tests”. The ASR thread's poll (209 voters) reads 44.0% “Fine” and 34.9% “Great” against 16.3% “Not terrible” and 4.8% “Poor”; Amazon owners average 4.4 of 5 from 27 ratings and Headphones.com buyers 4.8 from 24.