Sennheiser HD 550 vs Sony WH-1000XM4 | TechTalkTown
Sennheiser HD 550 vs Sony WH-1000XM4
Sennheiser HD 550
Sennheiser
8.2
A neutral, comfortable open-back that's the new pick of the 5-series
Sony WH-1000XM4
Sony
8.7
Still a noise-cancelling value champion
Sennheiser HD 550
What Reviewers Agree On
The best-sounding headphone in the HD 500 series — improved bass body and a more balanced, neutral tuning over the HD 560S and older 5-series models
An organic, well-articulated midrange with clear, centred vocals is the HD 550's standout strength, true to the classic Sennheiser house sound
Genuinely comfortable for long sessions thanks to a featherweight ~237g build, reduced clamping force and breathable velour earpads
A 150Ω open-back that is easy enough to run from a dongle but clearly rewards a proper DAC/amp with extra detail and low-end control
Modular, serviceable design — easily replaceable velour pads and a detachable cable — gives the HD 550 strong long-term ownership value
Deal Breakers
Pros & Cons
Sennheiser HD 550
Pros
The best-sounding headphone in the HD 500 series — improved bass body and a more balanced, neutral tuning over the HD 560S and older 5-series models
An organic, well-articulated midrange with clear, centred vocals is the HD 550's standout strength, true to the classic Sennheiser house sound
Genuinely comfortable for long sessions thanks to a featherweight ~237g build, reduced clamping force and breathable velour earpads
A 150Ω open-back that is easy enough to run from a dongle but clearly rewards a proper DAC/amp with extra detail and low-end control
Detailed Comparison
Sound Quality
Sennheiser HD 550
Reviewers converge on the HD 550 as the best-sounding model in Sennheiser's HD 500 series — a neutral, well-extended signature with a more complete bass body, an organic midrange and a slightly forward treble that can occasionally turn gritty. It is honest rather than exciting, and rewards critical listening.
Having heard almost every HD 500 series headphone, Headfonics calls the HD 550 the best-sounding one of the series, crediting refined bass and treble for a small but real step up over its predecessors.
The bass is one of the most potent in the series — fuller and more satisfying than older 5-series models, with the usual sub-bass dip far less pronounced, though it could still use a touch more punch and dynamism.
The midrange is where the HD 550 excels — vocals are warm, organic and clearly centred, with enough detail for critical listening, classic Sennheiser house sound done well.
Trusted Reviews praises a beautifully neutral, even-handed frequency response with high detail retrieval and good bass control, but says the presentation lacks energy and excitement — analysis over entertainment.
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The lower treble can get edgy, gritty or scratchy, especially at higher volumes — the most consistent sonic criticism across reviews
The thinly padded headband with no central V-cutout creates a top-of-head pressure point that undercuts the otherwise light, comfy fit
The proprietary 2.5mm twist-lock cable connector limits third-party cable and boom-mic choices, and only a basic 3.5mm cable is included
Sony WH-1000XM4
What Reviewers Agree On
Class-leading active noise cancellation (QN1 processor + dual mics per cup), adaptive to your activity and location
Excellent, customisable sound with LDAC, DSEE Extreme upscaling and a capable app EQ
Exceptional all-day comfort and an understated, lightweight design carried over from the much-loved XM3
Strong 30-hour battery (ANC on) with a 10-minute quick charge giving ~5 hours of playback
Genuinely useful smart features — Speak-to-Chat auto-pause, wear detection, Quick Attention and multipoint pairing
Outstanding value now that prices have fallen well below the $349 launch — still a top recommendation years later
Deal Breakers
Mediocre microphone/call quality — barely better than the XM3 and frustrating for conference calls
Multipoint disables LDAC — you can't have two-device pairing and hi-res audio at once
No aptX and no IP water/sweat rating; not recommended for running or heavy gym use
Some long-term units develop a piercing feedback noise in one cup in ANC mode (moisture/sweat on the mics over years)
Sony doesn't sell official replacement ear cushions, a wear-and-tear item on a long-lived product
Modular, serviceable design — easily replaceable velour pads and a detachable cable — gives the HD 550 strong long-term ownership value
Cons
The lower treble can get edgy, gritty or scratchy, especially at higher volumes — the most consistent sonic criticism across reviews
The thinly padded headband with no central V-cutout creates a top-of-head pressure point that undercuts the otherwise light, comfy fit
The proprietary 2.5mm twist-lock cable connector limits third-party cable and boom-mic choices, and only a basic 3.5mm cable is included
Sony WH-1000XM4
Pros
Class-leading active noise cancellation (QN1 processor + dual mics per cup), adaptive to your activity and location
Excellent, customisable sound with LDAC, DSEE Extreme upscaling and a capable app EQ
Exceptional all-day comfort and an understated, lightweight design carried over from the much-loved XM3
Strong 30-hour battery (ANC on) with a 10-minute quick charge giving ~5 hours of playback
Genuinely useful smart features — Speak-to-Chat auto-pause, wear detection, Quick Attention and multipoint pairing
Outstanding value now that prices have fallen well below the $349 launch — still a top recommendation years later
Cons
Mediocre microphone/call quality — barely better than the XM3 and frustrating for conference calls
Multipoint disables LDAC — you can't have two-device pairing and hi-res audio at once
No aptX and no IP water/sweat rating; not recommended for running or heavy gym use
Some long-term units develop a piercing feedback noise in one cup in ANC mode (moisture/sweat on the mics over years)
Sony doesn't sell official replacement ear cushions, a wear-and-tear item on a long-lived product
The treble is the recurring weak point — Trusted Reviews notes it can get edgy and gritty especially at bigger volumes, and Headphones.com calls the lower treble rather scratchy and dry.
Headphones.com rates the HD 550 perhaps its favourite Sennheiser midrange tuning yet, with better bass extension than the HD 6 series and less upper-midrange glare than the HD 505.
Audio46 describes an uncoloured, natural signature with articulate, non-boosted bass, an honest midrange and a smooth, fatigue-free treble — a well-tuned reference headphone for both casual listening and studio work.
The Headphone Show says from a tonality perspective this is a better midrange than 99.99% of headphones, with more bass extension than the HD 600 and only a minor 5-6kHz region that stands out as a problem.
Christian Svedin describes the HD 550 as a great representation of the Sennheiser sound — analytic, with great stereo imaging and depth — though bass-heavy listeners may find it a little thin.
Reddit owners in the r/Sennheiser appreciation thread call the tuning fantastic for their ears and a very good value set, with one describing a discounted pair as the best money ever spent on headphones.
Sony WH-1000XM4
A judicious, confident sound with LDAC hi-res, DSEE Extreme upscaling and 360 Reality Audio support — widely praised, with the main critique being a slightly bright top end that some EQ to taste.
As far as sound goes the XM4 needs very few excuses made for it — a confident top end and a judicious overall balance.
Updating the QN1 chip algorithm and improving digital sound processing elevates the XM4 from great to superb over the XM3.
40mm drivers deliver rich, not overly bass-heavy sound; bass lovers can add thump easily in the app EQ.
Supports LDAC and 360 Reality Audio; DSEE Extreme upscaling exists but the difference on/off can be hard to hear.
Reddit owners' take: not 'the best' at any one thing, but it does everything right and sounds more than good enough once EQ'd.
Versus the XM5: the XM4 is brighter with more vocal 'bite/sizzle', while the XM5 is warmer with more sustained bass — and the XM4 can get a touch boomy at 100-200Hz.
Comfort & Design
Sennheiser HD 550
At roughly 237g the HD 550 is the lightest model in the HD 500 line, with reduced clamping force and breathable velour pads that make it comfortable for long listening. The catch is an underpadded headband with no central cutout, and a minimalist, all-plastic build that several reviewers find drab and a step down in heft from older Sennheisers.
At 237g the HD 550 is the lightest headphone in the HD 500 series, and Sennheiser has reduced clamping force enough that pad pressure is barely noticeable for long sessions.
Trusted Reviews says the HD 550 are more comfortable than they look, helped by well-judged memory-foam earpads in synthetic velour, a synthetic-leather headband and appropriate clamping force.
The build is mostly unremarkable plastic — Trusted Reviews notes it doesn't look or feel special, and the HD 550 don't fold, with only a little hinge movement for fit.
Headphones.com really dislikes the headband pad — no central notch and insufficient padding make the HD 550 among the less comfortable lightweight headphones tested, undercutting how light the frame is.
Headfonics wishes Sennheiser had kept the V-shaped headband cutout from the HD 560S that relieves the central top-of-head pressure point — a cheap fix that benefits the user.
The oval velour-cloth pads are a bit stiff at first but flatten over time, are easily removed and replaced on Sennheiser's standard ring system — a serviceable, modular design.
Headphones.com finds the HD 550's muted grey-and-black look more dated and austere than the HD 505, noting some buyers may simply prefer the sibling's appearance.
The Source Audio Video Design Group calls the extremely lightweight ~237g HD 550 a pleasure to wear even for longer listening sessions, made primarily of plastic-type materials.
Open-back by design, the HD 550 leaks sound freely both ways — Trusted Reviews found the leaky nature didn't endear it to people nearby when used outside, so it is a home-listening headphone.
Sony WH-1000XM4
The XM4 keeps the XM3's understated, lightweight design and superb comfort for long sessions, folds for travel and ships with an excellent hard case — the build holds up for years, with warm ears the only common gripe.
Design tweaks make the XM4 look slightly more lux and even more comfortable to wear for long stretches than the XM3.
Comfortable enough for full workdays — barely noticeable where other headphones bother the ears after 20 minutes.
After a year of heavy use the wear-and-tear is essentially non-existent and they don't wear you out — superb value.
Lighter than the AirPods Max with a much better hard carrying case; folds flat for travel (the XM5 does not).
Like most over-ears in this class the faux-leather pads aren't very breathable — ears get warm after about 6 hours.
Value vs Competition
Sennheiser HD 550
Launched around $349.95 and now widely seen at $299 or lower, the HD 550 sits in a crowded open-back field against its own siblings — the HD 505, HD 560S and the legendary HD 6XX/HD 600. Reviewers agree it is the most complete-sounding 5-series model, but disagree on whether it beats the cheaper HD 6XX on outright value.
The HD 550 launched at $299.95-$349.95 (£249 / €299) and is frequently discounted lower — Audio46 listed it as low as $199.95 on sale.
Headphones.com's chief reservation is value — it argues the HD 550 still isn't as good a buy as the cheaper, legendary HD 6XX, even while praising the HD 550's tuning.
The Headphone Show calls the HD 6XX the indisputable value king of the price range, but still rates the HD 550 a personal favourite and one of its preferred Sennheisers.
Major HiFi's HD 550 vs HD 560S verdict: the HD 560S is the pick for accuracy-obsessed audiophiles and pros, while the HD 550 is the more relaxed, musical listen with a more holographic soundstage.
Reddit users repeatedly flag the awkward pricing — the cheaper HD 505 at ~$280 sitting just below the HD 550 at ~$300 strikes some as predatory and confusing within Sennheiser's own lineup.
The Source Audio Video Design Group still believes the HD 650 offers better long-term value than the HD 550 thanks to superior build and a 300Ω design that excels on tube amps, despite the price gap.
The Headphone Show argues that with a fancier build the HD 550 could comfortably sell at $500-600 without complaint — at its actual price the sound is the value story.
Audio46 sums the HD 550 up as a sleeper hit — a solid mid-tier open-back with studio potential well worth considering in the under-$300 category.
Sony WH-1000XM4
Launched at $349 alongside the XM3's price, the XM4 is now routinely $198-260 — making it, years on, one of the best-value premium ANC headphones and a frequent pick over the pricier XM5.
Launched at the same $349 price as the XM3 did — and is now frequently discounted well below that.
Among the most popular and well-regarded wireless headphones you can buy; the XM5 is a premium upgrade at a more premium price.
Even 5+ years on, with a ~$250 price gap to the XM6 and street prices under $200, the XM4 remains excellent value and many prefer it to the XM5.
Now around $250 new / ~$200 used — more affordable than ever and a fantastic option, especially refurbished.
The staple recommendation for the average buyer — still ~$50 cheaper than the XM5 and they fold, which the XM5 doesn't.
