By aspect — in detail
Comfort
Strong consensus · 11 srcThe headline strength and the most consistent point of praise: featherlight at ~260 g, with unusually low clamp and full-swivel cups, it's repeatedly called among the most comfortable studio headphones — HD 800-tier for several reviewers. The recurring caveat is cup depth: larger ears can brush the inner mesh, especially with the shallower Mixing pads, and the thin headband pad and warm velour draw minor complaints.
“It also happens to be the most comfortable design they’ve released since the original HD 800.”
Listener, Headphones.com
“All four long-time HD 650 users from our team unanimously chose HD 490 Pro as the more comfortable Sennheiser model”
Sonarworks
“my ears start to touch the dust cover in front of the driver slightly, and it bothers me”
Listener, Headphones.com
Measured
≈260 g without cable; low clamping force (~2–2.5 N, DIY-Audio-Heaven); cups swivel a full 180° with a metal headband. Sonarworks rate comfort 9.7/10.
There isn't one tonality — that's the point. The velour Producer pads give a warm, fuller, mildly V-shaped voice; the fabric Mixing pads flatten the bass and push the mids forward for a leaner, brighter, more analytical sound. Neither tracks a neutral target out of the box, and a measured lower-treble lift colours both, so it's variously described as warm, neutral or bright depending on the pad and the listener. It takes EQ well.
“The velour Production pads offer more of an entertaining curve with increased bass and high response, while the fabric Mixing pads go for an analytical and neutral response”
Sonarworks
“HD 490 Pro is similarly bright to HD 560S, but is meaningfully more relaxed in the upper midrange”
Listener, Headphones.com
Measured
Neither pad is neutral out of the box: DIY-Audio-Heaven measures the Producer pads full to ~20 Hz with a warm tilt, the Mixing pads leaner (~40 Hz, −3 dB) with a forward ~1.2 kHz. Impedance is nominally 130 Ω (measured ~120–140 Ω across rigs); sensitivity is fairly high.
The defining HD 490 PRO debate. There's broad agreement on the fact — a measured lower-treble lift around 4–6 kHz — but a sharp split on the result. One camp (led by the most critical listening reviews and echoed by some owners who EQ it down) hears it as coarse, grainy and glary; another (several measurement writers and owners) hears it as smooth and non-sibilant. How intense it reads tracks the pad choice, the source, and ear sensitivity.
Measured
Multiple rigs (ASR, DIY-Audio-Heaven, Sonarworks) show an elevated lower-treble region around 4–6 kHz; Sonarworks flag the high-mids/treble as 'less neutral than HD 650.' The Producer pads separate the treble further from the mids, so it can read more apparent even while smoother.
⚠ vs. listeners — The camps aren't disputing a fact — 'coarse/grainy' and 'smooth/non-sibilant' are opposite valences on the same measured 4–6 kHz lift, and how gritty it reads genuinely changes with the pad, the source and how treble-sensitive the listener is.
Where it splits
Coarse and grainy — a lower-treble glare around 4–6 kHz that reads as a real flaw.47%
“regardless of pad choice, the HD 490 Pro is a coarse, rough sounding headphone”
Listener, Headphones.com
Smooth and non-sibilant — present but never sharp, fine for long sessions.53%
“Treble is present, not sharp and not sibilant.”
Solderdude, DIY-Audio-Heaven
Agreement on the extension, a split on the impact. Sources broadly praise genuinely deep sub-bass for an open-back — several call it better than the HD 600/650 — paired with very low distortion. But the level is soft rather than punchy: the Producer pads add warmth and body that some hear as tubby or 'thin' in impact, while the Mixing pads trade quantity for a tighter, leaner low end.
“Bass extension is decent and better than HD600/650.”
Solderdude, DIY-Audio-Heaven
“the bass lacked the impact I get when I listen to Sennheiser HD 650 with EQ for example”
amirm, Audio Science Review
Measured
FR reaches deep for an open-back — roughly full to ~20 Hz on the velour Producer pads, ~40 Hz (−3 dB) on the fabric Mixing pads (DIY-Audio-Heaven). Sonarworks and unheardlab both measure very low distortion; Sonarworks call it clean 'right down to 30 Hz.'
Pad-dependent, and the clearest illustration of the two-tuning design. On the Producer pads the midrange is warm and a touch recessed — pleasant but a little rounded and less defined than the 6-series. On the Mixing pads it steps forward and cleans up, to the point that the sharpest critic called it a favourite Sennheiser midrange behind only the HD 600 and HD 650.
“the HD 490 Pro with Mixing pads might be my favorite midrange presentation from Sennheiser behind the HD 600 and HD 650”
Listener, Headphones.com
“it comes across as a bit rounded and lacking in definition compared to reference models like the HD600”
unheardlab
Soundstage
Contested · 8 srcSources split, and it's partly a mismatch of expectations. Sennheiser markets a wide, spatially accurate stage, and many owners — especially gamers — hear exactly that: open, spacious, easy to place things in. But several critical listeners find the presentation intimate and congested, an in-your-head sound not much bigger than the cheaper 500-series.
Where it splits
Intimate and congested — an in-your-head presentation, not the wide stage the marketing implies.55%
“almost everything seems artificially close and intimate”
Listener, Headphones.com
Generally rated a strength and a big reason gamers reach for it: precise left–right (and vertical) placement, helped by tight channel matching. The caveat, raised by more than one listener, is that separation and layering can fall apart in dense, busy passages even while directional imaging stays sharp.
“Stereo imaging is decent and a bit better than HD6x0 series and about on par with the HD 560S/HD400 PRO”
Solderdude, DIY-Audio-Heaven
“in a lot of music and in chaotic moments in gaming, I find the separation and layering of these headphones to be rather subpar”
GrimTurtle666 (r/headphones)
Measured
Sonarworks measure channel balance within ~2 dB and negligible pair-to-pair variation below 6 kHz — tight tolerances that support the precise imaging.
Adequate to good, and again pad-dependent: the Mixing pads resolve more than the Producer pads and edge out the cheaper HD 560S. But it's not a resolution standout — reviewers agree it trails the HD 600/650 and pricier references, so it reads clean and honest rather than revealing.
“To me detail retrieval is fine on both the HD560S and HD490PRO.”
Solderdude, DIY-Audio-Heaven
“There was a rather dramatic difference with good few steps drop in fidelity”
amirm, Audio Science Review
A mild soft spot. With the Producer pads several reviewers hear kick and percussion as soft and feathery rather than punchy; the Mixing pads firm this up and add propulsion, but no one calls it a slam machine. Good extension, gentle impact.
“The low end carries a decent sense of weight and rumble, though it is not particularly dynamic or hard-hitting.”
unheardlab
“it’s pretty soft and feathery on kick drum or percussion/horn hits when using the Producer pads”
Listener, Headphones.com
Net positive with a small asterisk. It's light and feels solid, with genuine premium touches — a metal headband, a replaceable single-sided cable and washable pads. The flip side, noted nearly as often, is that the shells are mostly plastic and can read cheap at first, and a minority reports the plastic earpad-alignment tabs cracking (owners and Sennheiser call these cosmetic, not structural).
“The headphone is ultra light courtesy of plastic composite that manage to also feel extremely solid.”
amirm, Audio Science Review
“The latches that hold the earpads are of terrible quality”
FearlessEscape5483 (r/sennheiser)
Measured
Metal headband with stainless-steel reinforcement; ~260 g; single-sided 4-pin mini-XLR cable that plugs into either cup; pads and cushions are user-replaceable.
Isolation
Strong consensus · 4 srcOpen-back by design: essentially no passive isolation and it leaks freely both ways. Expected for the type, not a flaw — a couple of reviewers even find it a touch more private than some open-backs — but it rules out commutes and shared rooms and makes it a quiet-room headphone.
“There is little isolation from outside noises as this is an open headphone.”
Solderdude, DIY-Audio-Heaven
“you will need an environment that tends toward the quieter side”
postPerspective
The other big debate, and the one buyers argue about most. Almost everyone agrees the product is good; the split is whether it's worth ~$399. One camp says the same-driver HD 560S is far cheaper and the HD 600/650 sit right beside it, so it's hard to justify. The other says the class-leading comfort, two-pad versatility, low distortion and open-back bass extension earn the price — and owners, on balance, keep them.
Where it splits
Priced too close to its own siblings — the cheaper HD 560S shares its driver, and the HD 600/650 outclass it.45%
“a headphone that’s probably a bit too expensive, doesn’t really sound as good as the HD 600 and 650”
Listener, Headphones.com
Worth it — the comfort, versatility and build justify a professional price.55%
“the HD 490 Pro headphones cost exactly what professional mix headphones should cost”
postPerspective
