Sennheiser HD 820

General Information

With these groundbreaking closed dynamic headphones passionate music lovers can now enjoy their music at an audiophile level wherever they please, at home or on the move. Featuring unique glass transducer covers that minimize resonances, the HD 820 are simply the most transparent-sounding closed headphones in the world, extending the boundaries of what has been achieved in sound reproduction with closed type headphones up to now.

The new audiophile standard for closed-back headphones

For audiophiles there wasn’t any doubt: When it came to circumaural headphones the very best sound required an open back design. This axiom has now been rendered obsolete by the youngest member of the Sennheiser Audiophile Range: The closed dynamic HD 820 employ an innovative technology that makes them sound breathtakingly transparent and natural. Developed and made in Germany, they offer an incredibly realistic, natural sound field and also stand apart by the extraordinary attention given to every detail of their design. Their soft comfortable microfiber ear pads are hand crafted, providing excellent attenuation of ambient noise, while the robust metal headband includes an inner damping element. Get ready for an unparalleled listening experience.

Into the great wide open

Vivid, wide, transparent, natural. The sound field of the HD 820 is wide open. Which is not what you would expect at all from closed circumaural headphones. With the HD 820 you can explore and rediscover your music in absolute reference-class quality without intruding on the aural comfort zone of others. Thus, the HD 820 not only open up the sound field, but also new places and opportunities for you to enjoy your music.

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The technology of transparency

The breakthrough transparent performance of the HD 820 has been achieved through a special innovation: Their legendary Sennheiser Ring Radiator transducers are fitted with unique glass covers. Revealing the great look of the technical component within, this visually striking feature was actually developed wholly in service to the sound: The concave glass reflects the sound waves from the rear of the transducer to an absorber, which results in minimal resonance. Thus, the sound waves are effectively “gone” like they would be in open headphones.

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An all-star team of excellent components

Made in Germany, the HD 820 stand apart also because of the extraordinary attention that is given to every detail: From the extra comfortable handcrafted ear pads that insulate the listener from ambient noise, to the silvercladded OFC cables and gold-plated plugs, to the robust metal headband with an inner damping element. This package offers an unparalleled listening experience, which can even be improved by the Sennheiser HDV 820 amplifier for dynamic headphones – the perfect companion to the HD 820.

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Audiophile connectivity

Only what gets in can eventually get out. That’s why the HD 820 come with a specially tuned symmetrical, impedance-matching cable with low capacitance and a balanced 4.4 mm gold plug, which offers superior characteristics in contact resistance, and thus in sound.

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The look of superior quality

A well-conceived audio component always looks good – inside and out. With their unique glass covers the HD 820 display all the evidence to prove this. They are an aesthetical timeless classic and a natural technical beauty.

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What's in the box?
  • Headphones HD 820 (closed, dynamic headphones) connection cable
  • ¼” (6.35 mm) stereo jack plug (connected ex works), unbalanced
  • 4.4 mm Pentaconn stereo jack plug, balanced
  • USB flash drive (SD-U16L version) with instruction manual (as PDF file) and individually diffuse-field frequency response curve
  • instruction manual
  • storage box, microfiber cloth
  • XLR-4 connector, balanced
  • Technical Data
    • Impedance
      300 Ohms
    • Frequency response (Headphones)
      12 - 43800 Hz (-3 dB)
      6- 48000 Hz (-10 dB)
    • Sound pressure level (SPL)
      103 dB at 1 kHz, 1V
      • Ear coupling
        around the ear
      • Jack plug
        6.3 mm / Pentaconn / (XLR4)
      • Cable length
        3m
      • Weight
        360 g without cable
      • Transducer principle (headphones)
        dynamic, closed
      • Noise cancellation
        up to 26 dB (passive)

Latest reviews

exhale

100+ Head-Fier
The misunderstood child
Pros: Impressive sound stage (for a closed back especially)
Good, quality bass that extends well into sub bass territory
The mid bass does not bleed into the mid range (however recessed the latter might be)
One of the most comfortable headphones out there
More forgiving than their open back counterpart, the HD800S
Aspect (subjective)
The perfect companion for EDM
Cons: Fit and seal
Lack of a proper clamp force
Materials used (especially on the head band)
Lack of proper swivel on the ear cups (for a better fit)
The omission of a 3rd balanced XLR cable (which used to be included)
Retail price
Some might complain about the frequency response and tuning (not my case)
Introduction



Hello everyone. So here I am, making my first review here on Head-Fi, after quite a few years of careful reading, documenting and learning (for which I have quite a lot of head-fiers to thank to!).

My journey into decent audio started around ~10 years ago, when I was first gifted a pair of Beyerdynamic DT880 Pro, the 600 Ohm version which was meant to replace a very old pair of Technics RP-DJ 700. The Technics were used not as a DJ tool but as a studio pair of headphones. That’s the best I could do at that time, given my (very) limited access to audio gear and even those were received as a gift (I still have them laying around here, somewhere; if only I could find some replacement pads, they would get to see the light of day yet again).

Fast forward to today and here I am, finally at peace with my home auditioning equipment. It was a bumpy road, full of frustration and returns while going through more than 20 pairs of headphones, in search of what would be my perfect duet. I acknowledged pretty quickly that one pair will never do it and since I am the worst type of music listener (I listen to and love pretty much all genres, with a few personal biases, obviously), I could barely ask for help from anyone (since most of the normal people out there listen to 2-3 genres and call it a day).

The first member of the duet was Hifiman’s HE1000se (I will skip the journey that brought me to them; that’s for another review). It is the perfect headphone for all my atmospheric needs. Enigma plays angelically, Vangelis teleports me onto the scene while Hans Zimmer makes me part of the orchestra. They are a phenomenal pair of headphones and while they are good at other genres, too, they are brutally unforgiving.

This is where the second member comes in; say hello to the Sennheiser HD820. After a long and tiresome journey, riddled with LCDs, across Beyers, through Focals and past Sonys, at the end, they were there, waiting for me. Hyperboles aside, I tried to find a companion to the HeKse for everything trance (both above and beyond). Trance music is usually pretty terribly mastered and while I have listened to it through more forgiving pairs of headphones, I came to a point where I needed both forgiveness as well as a bit of scene, some taming in the higher registers with sufficient bass as to not feel the need to turn on my home audio system for it. The Audeze LCD-2 was good and a faithful pair of headphones but alas, I could not feel the kick and slam many a listeners were praising them for. The T1.3 had the bass I was searching for. And a bit of stage. And some more bass. Enough bass, actually, that I could split it among my colleagues and still be left with more than enough for my entire household. With the T1s, bass was bass, mids were bass and highs would have been bass, if physics would have allowed it. The famed and praised Sony Z1R; thought I will stop there with my search but alas, just as with it’s less refined brother, the Z7, so did the Z1R exhibited the nastiest resonance and some of the highest peaks one could wish to climb. Last but not least, I gave the HD820 a chance. The choice didn’t come easy since most of the famed reviewers out there have burned it at the stake. In the words of the famed wizard of everything transducer, Crinnacle the Wise: “Not even Gorilla Glass can save this abomination”.

Well, it seems that it takes an abomination to appreciate one therefore here I am, after a full page of useless rambling, ready to lay down my impressions (which I will try hard to consider as a review) of the Sennheiser HD820.



Packaging, build quality, comfort and accessories



I like to obtain all my gear new therefore I buy everything. Cables are the only accessories that I have ever bought second hand. The HD820 came in an unsealed, blue and gray package. Within, a black box and a user’s manual with a hand cloth (meant for cleaning and maintaining the headphones). Opening the box, I was presented with the headphones themselves, to which the 6.3mm, 3-meter cable was already connected. A second, 4,4mm balanced was there with a USB key card attached to it.

I will try and keep everything else about the build quality short since most of you already know how they’re made. In typical Sennheiser fashion, they are plastic made, with a novel element: Gorilla Glass domes on the exterior of the cups. I have seen a lot of pros and cons regarding build quality and while I realize that plastic makes for a lighter headphone, I cannot think that maybe, somehow, Sennheiser could have used, at least on the headband, a different material. Either more comfortable, more adjustable or something that adds a bit more clamp pressure and force. This is not to say they are not comfortable; they are! But they are also never properly fit on top of my head. They always tend to move a bit, either forwards or backwards, depending on my head’s motions. The quite heavy cable also does not help, since I always have to take care that it sits either on my lap or on my desk, otherwise it will add a drag and pull coefficient which only worsens the all-around comfort and fit.

As far as the cables are concerned, I will never judge the sound based on them. Yes, I am a strong contender of the fact that cables influence sound and if they do, then that happens on a live stage, where several tenths or hundreds of meters are needed and that’s where silver’s better conductivity comes into play, compared to copper, for example. In a cable, I always look for comfort, (lack of) memory, microphonics and most important, the quality of connectors and the soldering. Regarding the HD820’s stock cables, they are both thick but with a lesser degree of memory when compared to others (Sennheiser does advice to leave them completely unfold for a couple of days). They do exhibit quite a bit of microphonics and they are at least half a meter longer than I would have wished but at the end of the day, it’s not something worth losing sleep over. Yes, there are better stock cables out there but as far as I’m concerned, they are good enough for me and my use case (at least until I trip over them and in a furious rage, cursing, end up at my desktop’s screen, looking for a shorter replacement).

Comfort wise, so far (after ~10 days of usage), I find myself always fiddling a bit with the fit, until I get it right. Afterwards, even if I take them off, it seems that my muscle memory helps when putting them back on. I have a good seal on my head and although I am wearing glasses, I am resting the glasses’ frame on top of the cups (I know, I look like someone from a parody show but it’s the best of both worlds – no issue with seal and they are way more comfortable this way; at least for me). I wish a little more clamp force was present, as to not need the initial fiddling but all in all, they seem to disappear on my head after that. There is a minor hot spot on top of my head, due to the way it’s shaped and the fact that I shave it. Had I left my hair to grow (if I had any to grow at all), I’m quite sure this would have been a non-issue.



Sound quality, gear used and a few comparisons



My current setup is comprised of PC ---(USB)---> SMSL D400ex ----(RCA)---> Woo Audio WA6 2nd gen / ----(XLR)---> Violectric V202. Since I already wrote that I am a firm non-believer in cables = better sound, I will also admit the WA6 has a Isotek - EVO3 Initium power cable but that’s because the amplifier came without one, in box. Still, it’s far from what I’d call a snake oil cable and it only set me back 60 EURO.

The WA6 is used with NOS tubes, as follows: Emitron Mullard 53KU as rectifier with a pair of Sylvania 13DR7 as driver/power tubes. The V202 is used with a -6dB pregain, since in 0 db gain I could barely reach 9 o’clock without making the headphones sound like a pair of speakers. On the DAC, I have the “Low Dispersion” filter selected for PCM, “Wide” filter for DSD, “Sound 2 (5,6M)” for Sound Color and “Fixed” for Pre Mode (it outputs a fixed 0dB signal). Why have I selected these? I don’t honestly know. Nor can I say that I can tell a difference between the various filters available. But it’s what I settled on and it’s what sounds ok to me (so take any observations that DAC filters affect the sound with a pinch of salt).

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I only listen to music stored locally and I have never used (nor will I ever use) any of the streaming services available. File quality ranges from lowly 96 kbps mp3 files to DSD128 ones. One thing to note about this, though, is that not always file quality = audio quality. I have a lot of 320 kbps mp3s which are better recorded / mastered (at their source) than a few FLACs or PCMs. Also, there are a lot of online outlets from which you get PCM/FLAC files which are worse encoded than an mp3 (I mainly use Spek to check but any spectrograph will do just fine). I always try to buy my music in WAV/PCM format, except for those songs which I realize do not need a higher encoding (the aforementioned trance genres, drum and bass and generally, music which does not rely on a huge soundstage, for example, to convey its message). At the moment, locally, I have around 25000 files on my hard drive with an additional ~30000 stored on various disks and hard drives which are not in use. I buy most of my music, except that which is available only on vinyl. In that case, if I can find someone willing to rip a vinyl for me, good. If not, I’ll settle for what I can get off the web, as long as the quality is at least acceptable.

This is an example of a PCM bought from an online store, compared to a mp3 file i had at hand.
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As I wrote earlier, I listen to almost all genres of music, bar jazz and rarely to acoustic. I know, two of the strengths of the Sennheiser HD8xx series but such are my tastes and unfortunately, jazz never clicked with me while acoustic music tends to get boring while auditioning.

For this review, I will try to mainly focus on electronic music, the purpose of which the HD820 were bought.



Classic Trance (pre-2000)

Kai Tracid - Liquid Skies (Eternia Audio Lab Mix) (320 kbps, 44.1 khz, MP3) – this is one of the better mastered tracks out there. Classic trance is different from the more modern version by not being as crowded with elements. Most of the times, you get a kick drum, a bassline, some percussion, a pluck here and there and that’s it. Basslines are also quite simple, as in you rarely get songs with dual bass layers or that go into the sub bass territory. This particular song also has some vocals in it and it used to be aired on most of the radios and tv channels back in the day (I ‘member VIVA TV; the memories). The bassline is comprised of mid bass and the HD820 reproduces it faithfully. The pluck sound that accompanies the voice at 04:10 is a bit recessed, which I can only attribute to the dip in the mid-range that everyone was concerned about. The voice itself is clear and takes place at the back of the stage, which is a different presentation than what the HD800S offers, for example. The saxophone coming in just afterwards also sounds a tad recessed but does not affect the entire presentation. All in all, I enjoyed this song a tad more on the HeKse than I did on the HD820 with a small caveat: the voice tends to become a bit shouty on the Hifiman.



Alex Morph - Maximum Overdrive (Original 3rd Rmx) (192 kbps, 44.1 khz, MP3) – I’ve first heard this one on the Trance Energy 2000 disc. It was an hour-long video, with parts from all of the stages at that year’s event, featuring one or two songs from each. The HD820 renders every sound with perfect accuracy, never getting fatiguing (while the HeKse doesn’t allow me to go over 60dB of volume on this song). The kick drum and bass are clear, perfectly separated while the main saw comes in the middle without overpowering the entire song. The vocal echoes that are featured throughout the song do sound a tad recessed (as I have gotten used with, by now) but they are noticeable only if you intimately know the song and have listened to it on a host of other devices (both headphones and speakers). The extra mid bass emphasis brings this song to life, compared to the HD800S or the HeKse.



System F – Out of the Blue (862kbps,44.1 khz, FLAC) – another classic which sees the likes of Armin van Buuren team up with Ferry Corsten and release one of the most iconic tracks that used to be featured on radios and tv channels. Again, HD820’s mid bass emphasis helps with bringing this track alive while at the same time, makes the drum kick sound just a bit boomy, especially on lower quality encodes. The main pad and saw come together beautifully and thanks to its expansive soundstage, helps create a sense of atmosphere. All in all, a satisfactory rendition of the track without any recessions throughout the sound spectrum whatsoever.









Trance (post-2000)



Dj Eco - Light at the End (Martin Roth Edit of Lost World Remix) (320 kbps, 44.1 khz, MP3) – Post 2000 trance music starts seeing more complex passages of bass. Sub bass starts making an appearance and with the advent of better hardware and software, producers and remixers have started creating songs which are more wide, expansive and engaging than classic trance. Martin Roth is a mastermind and in this remix of Eco’s Light at the End, you get everything except vocals. Deep, dual bass line which is accompanied by masterfully crafted percussion on top of amazing pads and plucked synths. I was expecting the claps to sound a tad recessed, given the previous experience with the other songs but to my surprise, they didn’t. A perfect rendition of this song and the HD820 has done it with an apparent ease that only makes me anxious about what comes next.



Leon Boiler – Ocean Drive Boulevard (Intro Mix) (880 kbps, 44.1 khz, FLAC) – Leon Boiler used to have his own special type of music. I’d dare say it’s trance, since it contains a lot of elements belonging to the genre but it was much more than that. Having a background in classical piano, he manages to masterfully integrate it into this Intro Mix of his Ocean Drive Boulevard. Floor shaking sub bass accompanied by a saw mid-bass serve as the base for a lot of reverb-enhanced plucks and pads. Nothing sounds recessed or emphasized and it’s a perfect example of the HD820’s prowess when it comes to the lower registries of music. I cannot even touch this song on the HeKse, let alone listen to it at louder volumes but on the Sennheisers, I can blast away with little to no care for my eardrums or my general hearing health. Carpe Diem, as a dying Frenchman once tried to say but couldn’t, because he died.



Airbase – Medusa (Original Mix) (1411 kbps, 44.1 khz, PCM) – One of the stalwarts of modern trance music (which has now, sadly, moved on) is Jezper Soderlund a.k.a. Airbase (and a sleuth of other aliases I care not to mention here since I’ll run out of pages). Since I needed a more crowded song to test the HD820s, I chose Medusa because it has everything but the kitchen sink (and vocals) in it. While it does not dabble in the realm of sub bass, its bass line and kick drums are nothing short of amazing. Pads, plucks, claps, cymbals, reverse crashes – this song has it all. It used to be on Tiesto’s go-to playlist for quite some time, whenever the jockey had an event he had to attend to and is in my top 10 best trance tracks, all-time. As crowded as the song is, the HD820s doesn’t break a sweat in rendering it in one of its most faithful renditions, ever. I know this song inside-out and if anything would have sounded, even the slightest, recessed or over-emphasized, I would have noticed it in a second. Nope, sir. It made the hair on my skin stand up and dance while I was writing these lines, happily tapping my feet while sipping from my glass of tea.





Goa / Psytrance



Juno Reactor – Song for Ancestors (1411 kbps, 44.1 khz, PCM) – One of the songs that sealed the deal for me, regarding electronic music. The tribal accents throughout Juno Reactor’s songs coupled with his tendency to use a lot of live instruments and rely on fewer digitally generated ones make for one hell of a trip. At the beginning of the song, you can hear the vocalist emphasizing “sh” in her echoes. On the HeKse, they are unbearable and on the HD820, they are at the edge of becoming harsh but never trip over. A fairly crowded song in which a headphone’s ability to layer and separate instruments is vital yet, the HD820 does it with exceptional quality. Alas, when compared to the HD800S, the soundstage takes a hit and since the song has amazing qualities which emphasize it, it can sound a tad closed in (again, only when compared to the HD800S or the HeKse, for as long as I can listen to the latter, anyway). The guitar that comes in at 05:40, alongside the chants is something to behold! The drums that immediately accompany them are the icing on the cake. All in all, 11/10, would blast a cigar again to this and I’m not even a smoker!



Juno Reactor – Swampthing (1411 kbps, 44.1 khz, PCM) – While it’s not Marvel’s superhero, Juno Reactor’s Swampthing goes in deep, deeper than an earthquake. With a kick drum that makes my 12” woofer call for help, a few whistles that make my eardrums do the same and tribal drums that make me put my South-African outfit and start dancing, this song is as representative of the genre as is Red Bull of energy drinks. With some electric guitars which can be easily named Tremolo and nobody would object, this song is also one of my favorites and I can safely say that while bordering on the line of sibilance / harshness a few times, the HD820 does an admirable job in keeping the fatigue out of the earcups and out of my ears. Bravo!



Juno Reactor – Conquistador (Astrix Remix) (905 kbps, 44.1 khz, FLAC) – by now, I think it’s clear that I’m a big fan of Juno Reactor. I’m also an Astrix fan so it’s only natural that I’d include his remix of Juno’s Conquistador. The song is, originally, a 2 part track. The first one has most of the vocals and acoustics while the second one goes for the beat. This is a remix of both (so a 2 in 1) and the main difference is that you can easily spot Astrix’s bassline and kick drums, which go well beyond the sub bass territory while being mastered with a bit more compressors added on certain channels when compared to the original. This is the first song where the bass starts getting a bit uncomfortable. Yes, there, I wrote it! HD820 has too much bass in this song and I don’t like it! Yes, it’s the mid bass emphasis that gets my nerves tingling and forces me to lower the volume a bit. But that’s on the WA6. On the Violectric, the bass is a tad more tame while the upper registries get a bit more presence, bordering on the edge of sibilance. The sub bass that accompanies the slam drum/kick, at the start of the song, is amazing. It gets the earcups moving and my eardrums, bleeding! What an awesome sensation, having to shout when talking to my wife, who’s sitting at 30cm away from me. God bless you, Sennheiser!





Progressive (Trance / House)


Astrix & Freedom Fighters – Burning Stones (Original Mix) (320 kbps, 44.1 khz, MP3) – This is another song where the HD820’s mid bass emphasis makes itself more present. The song gets a nice intro, which shows the headphones’ prowess in soundstage while quickly following with a fat beat, which goes just shy of the sub bass realm (slowly stepping into it but never staying there). This is a song I’m quite familiar with but alas, the HD820’s recessed mid range takes a toll on the whole presentation. Compared to either the HD800S or the HeKse, some pluck effects / voices are heard more towards the back of the scene but at the same time, the crossover voice that starts at 04:10 and carries on with the rest of the song, for a few seconds afterwards is tolerable, unlike with the HeKse, where it reaches ear drum drilling levels of harshness. All in all, I love the song and how the HD820 presents it but if I were to rate it on a scale from 1 to 10, it’s a 7/10 while the HD800S is 8.5/10 and the HeKse is 9.5/10 (it could have been a clear 10 if not for the forementioned harshness).

Ranji & WHITENO1SE feat. Nina Nesbitt - The Moments I'm Missing (Extended Version) (320 kbps, 44.1 khz, MP3) – This is something that I’ve recently discovered and included in my playlist. I do listen to a lot of Ranji’s songs but of this particular one, I was unaware of. It has a nice, specific build-up up until ~01:50, where the whole song takes a seat back and translates into what you’d call the apex of the song (or breakdown). A sleuth of pads, piano and Nina’s voice take over and get us ready for the 2nd part of the song, the one where you usually get a taste of everything altogether. I do notice her voice to be a tad recessed, compared to either of the headphones mentioned until now but it’s not necessarily a minus. The song tends to be a bit hot, at some point but the HD820’s characteristic makes it more than tolerable. The sub bass extension is good but not as good as the HeKse’s and, again, this is more praise than blame, since I’m comparing a dynamic driver to a planar one. The percussion is clear throughout the song so no complaints here. I’d say it’s a faithful presentation of the track with just some minor differences, here and there, only noticeable to someone who has listened to the song for a long while.



Nibana – Aeon (1411 kbps, 44.1 khz, PCM) – I’m now heading towards a more darker realm of progressive trance – Nibana. This is a flawlessly mastered track, with zero compressors added and everything is in check. It’s a testament to what proper mastering can do for a track and if the track is already good (I know, subjective), then it can only take it to the next level. The bassline heard here is eerily familiar to that from Travis Scott’s Tenet soundtrack. I dare not say anything, just that it’s uncanny to listen to Aeon and then, to Tenet (it wouldn’t be the first time a popular artist copied a less popular one (*cough* Will.I.Am. -> Arty *cough*)). The song is a dark atmospheric piece of progressive music, which lends itself on the phat bassline to carry it out throughout its duration, accompanied by masterfully chosen percussion, pads and plucks / synths. The HD820’s recessed midrange, again, makes the song incredibly tame, compared to any of the more revealing headphones out there. It also detracts a bit from its beautiful soundstage, which can be heard on the HD800S and it’s as expansive as it can be. Still, the reason I bought them is because I wanted a less revealing and vengeful pair for exactly this kind of music and for this, they fulfilled their duty with perfection.



Namatjira – I’ll Kill You (Original Mix) (320 kbps, 44.1 khz, MP3) – A progressive house piece which is both dark as well as calming, soothing in its rhythm and vocals. It’s a center stage song, with no show of soundstage whatsoever but it wasn’t meant to be this way. It’s a rather simple tune, with a kick drum, bass line, low saw pad, a few plucks / synths that get carried by a wonderful piece of vocal. The song itself has a few compressors added and it’s rather mid-range emphasized so it’s not something that I’d use to show the strengths of the HD820. Still, it’s more than satisfying and while this one never gets hot on either of my headphones, it still left me wanting a bit more presence out of the vocals.





Breakbeat / Drum and bass / Jungle



Aphrodite – Twilight (Original Mix)
(1411 kbps, 44.1 khz, PCM) – the godfather of jungle and drum and bass – Aphrodite. He’s old enough to be elected president of the U.S. of glorious America but he still hasn’t lost his touch (if one cares enough to listen to any of his recent releases). In this case, we’re talking about his 2016 release called Twilight, which includes the original mix alongside Slab Bass’ remix. I prefer the former, since it’s more up my alley and the first thing you notice is how similar is to another (almost soundtrack-like) tune – the one from the Friday the 13th franchise. Alas, it was a sample of Brian Bennett’s Glass Tubes which is also the theme of the song. The track is fairly simple in its construction, relying on two points of breakdown that slide into a saw bass beat, nothing fancy but it’s good enough for my drum and bass needs. It does go well into the sub bass territory and it does so with grace. I’d say it’s one of the more pleasant renditions of this song and this is a testament to Sennheiser’s craftmanship and the prowess of the ring driver used in the HD8xx series.



Spor, Ewun & Evol Intent – Levitate (1411 kbps, 44.1 khz, PCM) – a rather rhythmic track which changes beats halfway, preparing us for the breakdown. It goes well into the territory of sub bass and the HD820 does a masterful job at playing it back. It’s also a rather spatial sounding (at times) track, which is not at all specific to drum and bass but in this case, the HD820 fails to deliver the spaciousness that it’s younger sibling, the HD800S, manages. Nothing sounds recessed and as far as I’m concerned, I got my proper fix from it. I would have loved a tad more presence in the sub bass, say, a la Arya SE but sure enough, it came close and this, again, is nothing but praise at the HD820’s address.



Fallout – Scimitar (128 kbps, 44.1khz, MP3) – now this is a song you won’t find anywhere else on the web, regardless if we’re talking vinyl, CD or digital format. I’m not kidding! Go search for it and tell me if you found anything! I have carried this with me from back in the days of the Breakbeat terrorism forums and it was meant to be used as a soundtrack for an upcoming game, developed by the same artist that created the song, too – Fallout. It’s an incredibly atmospheric piece of dark drum and bass that really pushes the limits of what sub bass can be. God bless the Britains and their forum, for I have them to thank for this pure gem from 2003. Not many headphones manage to convey this track’s sub bass and while the HeKse does it better than the HD820, the Sennheiser is no slouch, either. There’s a flute-like sound (close to what Enigma uses in his songs, can’t find a better explanation for it, sorry) that adds to the mysticism of the track and in this case, it does sound just a tad recessed. This song never sounds harsh on any headphone and it’s most beautiful trait is the sub bass. To make it easier for you to understand what I’m referring to, here’s a link to it, uploaded on my Google Drive.






Aphrodite – Tower Bass (1002 kbps, 44.1 khz, FLAC) – back to grandfather Aphrodite and his 2009 release, Tower Bass. It’s proper jungle and it sounds as if it’s a binaural recording! Some of the percussion used at the start of the song tend to be a bit hot, on the HeKse, for example but nothing of the sorts on the HD820. Aphrodite’s skills can be heard throughout the entirety of the song and it’s a treat for the ears and mind. It’s rather mid bass heavy and it plays to the HD820’s strength. It’s one of the better renditions of this track and I’m quite happy with how it sounds since the mid range dip hasn’t affected anything from the track.



Beta – Headspace (Original Mix) (320 kbps, 44.1 khz, MP3) – Beta is the sushi master of breakbeat and you better be sure he never disappoints when it comes to layering his kicks and drums in such a way that even if you’re not a fan of the genre, you end up shaking your head to the tune’s rhythm. A rather complex song, that has passages which delve deep into the sub bass territory. One can hear the saw bass accompanying the sub bass and the pluck that comes in at 03:12, alongside the apex of the song sounds nice, clean and without a hint of resonance (while on other closed backs, such as Sony’s MDR-Z6, it makes my tinnitus call 911). Again, this is a testament to Sennheiser’s craftmanship and engineering skills! To be honest, I only listen to this song on my speakers + woofer setup, since it’s the only one that renders a good impression of the song but on the HD820, I kid you not, it sounds quite satisfying!



Other genres



Note: this is a set of impressions while listening to other genres of music. There’s no special way that I’m doing it, it’s just simply me browsing through my playlist and picking whichever song draws my attention. I’ll skip any sort of text regarding a specific song’s genre and just continue to write about my own subjective experience.



Loreena McKennitt – Bonny Portmore (768 kbps, 44.1 khz, FLAC) – Loreena McKennitt’s rendition of an old Irish traditional folk song, which is an ode to the fallen oak’s of the old Ireland but more specific, the Portmore Ornament Tree (wiki). I have to thank @Nomax for reminding me of both this song as well as the artist (he did it unintentionally but that’s not what matters here). The HD820 tames Loreena’s voice just a bit, not allowing it to reach the heights it does on the HeKse and this makes for a laid back representation of the song. This can be both a con and a pro, depending on everyone’s mood and listening taste. There’s no hint of sibilance or underemphasis. The soundstage they render is good, better than most of the open back headphones I have listened to but it’s noticeably more closed-in that on either the HD800S or the He1000se. If I were to blindly listen to the song, not knowing about the HD820’s existence and not knowing what I have on my head, I would never say “Hey, this is a closed back headphone!”. The lack of air and extension does make me want to switch back to the HeKse, for this particular song but this is not something I can attribute as a fault; it’s just the superiority of open back headphones and Hifiman’s prowess, for this particular track.



Fred again.. – Kammy (Like I do) (2117 kbps, 44.1 khz, PCM) – Well, it’s Fred, again! I rarely listen to modern music, especially EDM but this track (and a few others of Fred again..) brings me a sense of nostalgia. It’s a blend of new and old, breaks with vocals, pads which you usually hear in trance and electronic ambient tracks with an all around relaxed atmosphere to the song. The percussion seems to be a bit recessed while the kick drum is emphasized, according to the HD820’s specific tuning. The vocals are just a tad behind the scene and a pinch less present than on the HeKse. Sadly, at the moment of writing this, I no longer have the HD800S to compare them. What I do appreciate is that even though the kick drum is emphasized within the track, there is no hint of boominess and this is something I was afraid of, when first listening to this track. A great overall listening experience and the general feeling is that of “inside the club”, when listening to the HD820 while on the HeKse, it sounds more like “I’m at a festival”.



Florence and the Machine – Wish That You Were Here (848 kbps, 44.1 khz, FLAC) – Ah, dear old Florence and her soundtrack from a movie which I liked, despite the general bad reviews it got (I might be mistaking here but it seems that people were pissed that it wasn’t that faithful to the books? Too lazy to google it). There’s not much to say here except this: Don’t listen to this on the HD820. Nope. Skip it. Choose something else. Rihanna, maybe? Kiddin’! The voice is not recessed but rather subdued to levels where you think you’re listening to a pair of very bad speakers. Florence’s voice is powerful, intense and always takes the leading position on the scene, when listening to her songs but on the HD820, it sounds like she’s just drowning while an orchestra plays around her, waiting for her last breath to be had. The HeKse literally runs around the HD820, with this track. There’s no air, no space, no extension, no soundstage. It’s like this one was created just to show and emphasize the shortcomings that this pair of headphones has. I wish I could erase my experience listening to this song, on the HD820. Alas, after 10 beers, I still remember it.



Enigma – Endless Quest (871 kbps, 44.1 khz, ALAC) – One of the artists that makes me proud to be Romanian, Michael Cretu. The shakuhachi flute is the lead sound in this song while a set of drums with background vocals and the required percussion are following around. It’s a very meaty rendition of the song but with a lot of presence from the flute, something which I did not expect (I was expecting recession, as the one we’re currently going through). The sense of soundstage is there but the sound is not allowed to extend beyond a few centimeters from the ears. Good instrument separation but a bit muffled by the mid bass presence. It sounds very much like the Klipsch R51pm I have on my desk but with less bass coming out (not a fair comparison, since the Klipsch are connected to a SVS sub woofer). At around 1:18 in the song, the flute’s echoes can be a bit distracting, if listened to louder levels. Still, a good audition on the HD820. 7/10, would do it again.



Cigarettes After Sex – Apocalypse (822 kbps, 44.1 khz, ALAC) – When I first listened to this song, I thought it was a woman singing! It actually took me watching a live video of them to realize it’s a man and boy, was I surprised! This is one of the songs where I appreciate the HD820’s mid bass emphasis because it makes the song full while not subduing the vocals. The percussion is clear, the guitars are present, clearly discernable and everything is in order. One of the better renditions of this song and I cannot be happier with how it sounds! (It’s funny how if a song sounds great, there’s not much left to write than just this – that it’s great but if it sounds bad, boy do my fingers start moving on the keyboard).



Haggard – Herr Mannelig (5831 kbps, 192 khz, ALAC) – A Swedish ballad, sung in Italian by a German band. What a troll move! It’s actually amazing how good it sounds on the HD820! The electric guitar is perfectly accompanying the vocals, be it male of female, as heard throughout the song. The drums and background vocals are perfectly layered on top of everything and nothing sounds recessed! I don’t think there’s any surprises here, as the headphones were meant for rock, as well, given their tuning. “Herr Mannelig, Herr Mannelig, ta na na na na…” (can’t understand Italian that well, sorry).



A.R. Rahman – Mumbai Theme Tune (756 kbps, 44.1 khz, FLAC) – One of my favorite songs, all time. It’s simply amazing how much can be done with so little, instrumental wise. This song is all about space, distance, clarity and pure musical art. If anyone asks to listen to something “chill”, this is one of the first songs that pops in my mind, as a recommendation. Rahman is a musical genius, there’s no doubt about that and this song is, simply put, a journey. The HD820 doesn’t muffle any of the instruments. At 02:15, when the pads come, they do so gracefully and the mid bass pad used throughout the song is like a warm blanket on my ears. At 02:52, they go up an octave and I was expecting distortion and Sennheiser didn’t disappoint me; distortion I got. But just a BIT. Enough to be heard / felt but it was there; f*ck! A stain on an otherwise incredible rendition of the song. At 03:58, the violin comes and boy, no harshness whatsoever. This song cannot sound bad on anything, that’s what I came to think. BUT!!! – in comes the HeKse and everything seems to go up at least a level or three: the space, the graceful distancing from the instruments, the clarity of everything this song has to offer. I kind of saved the best for last especially since I am very intimate with this song and while I cannot fault Sennheiser here, the limitations of a closed back are obvious but ONLY when compared to something like the HeKse. I have listened to this song on the HD800S as well and the differences are noticeable. Not as bad as from the HD820 to the HeKse, given the similar tonality but they’re there (mainly in sound/head stage and over all clarity).

IMG_6245.JPG






End notes and conclusions


At the end of the day, the reason for my purchase of the HD820 was that I needed a pair which is better at electronic music than the HeKse and that’s what I got. What I also got, were bonuses on genres I did not expect them to perform so well. Most of my conclusions and impressions were done with a tad of harshness on my side, considering their price. I HAVE to point out faults or cons when paying 1600 EURO for a pair of headphones but to my big surprise, they weren’t that many (at least not as many as most reviewers out there made it look like). Not so long ago, I made a statement that the IE 900 are Sennheiser’s best product (except HE-1; have not got the chance to audition it and chances are I never will) and after listening to their entire top of the range line-up, I stand by my statement. But this is not to detract from the HD800S/820’s incredible sound quality and general musical prowess.



Are the HD820 worth 1600 EURO? Well, yes and no. I could easily live with them as my only pair of headphones, especially if I would of never had the chance to audition other pairs, such as HeKse, He1000v2 or the HD800S. In this case, they’re worth it. Otherwise, no, I think a proper asking price would be the same as for the HD800S, considering the trade-offs involved. But this doesn’t mean I don’t understand the “why”. It’s a tough feat of engineering to manage to make a driver sound in such a different way, regardless of what’s involved (acoustic absorbers and refractors, etc.). Out of all the pairs of headphones I have listened to, there is only one that I constantly miss yet, it’s the only one I never keep more than a month: the HD800S. But this will change, as after this long of a journey, I understand why I need them. But if you were to take the 820s away from me, I’d probably feel the same. There’s something about their sound which is not addicting but rather… symbiotic with my life style.



I would like to thank Sennheiser for provi….wait, no, scratch that. I bought them on my own, f*ck off Sennheiser, I won’t say good things about them! Well, I did, actually, because I love them and after close to two weeks of living with them, I can comfortably say that these are here to stay.



Most of the listening was done on the Woo Audio and less so on the Violectric. Why? Because to my ears, they sound better from the tube amp. The Violectric does manage to solve some of the shortcomings I’ve written about in this review, such as soundstage or clarity but at the cost of a tad more harshness at the top end of the spectrum and a bit less presence in the lower registers. Ideally, I would swap amps in accordance with the song I’m listening to and this is what I’ll probably do, from now on.



Regarding fit and seal, it seems that with enough time given, this becomes less of an issue. It’s easier to place them on my head and listen to music than it was at the start of this review. Yes, if you yawn, drink, eat or talk with someone, the seal is broken and the 4 riders of the Apocalypse shall ride onto Earth to bring about the End of Days…f*ck, sorry, wrong review!
IMG_6249.JPG





Thank you for reading and enjoy listening to music, regardless of your gear or genres. For me, it’s pure medicine and it managed to spare me of many trips to doctors, in search of something that was wrong when, at the end of the day, it was just over exhaustion and lack of proper “me” time.

P.S. Please, do excuse the mess that my desk is, right now. I still haven't got to replacing the surgical Hifiman cable (and i'm going through some "revisions" of everything so i'm moving my gear from one place to another). Also, the quality of the pictures is less than desirable, i know but i guess it'll have to do! Don't need another "hobby" such as photography. Yet.
C
csch92
i was trying the first song you posted in psytrance. thats something i really didnt tought would go trough as psytrance. but it really somehow tested the limits of headphones. my mezes still blow me away every time
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Rob80b
Rob80b
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A
anach
Beautiful work, thank you for sharing your thoughts!
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552609

1000+ Head-Fier
Great Gaming Headphones
Pros: Good quality bass
Good detail
Excellent soundstage
Good instrument separation
Great gaming performance/spatial imaging
Big ear cups
Good highs
Cons: Lower bass quantity
Mids are just OK
Build quality
Original Logo Small.png

Overview:

Up for review today are the famous Sennheiser HD820 (HD820.) The closed-back version of the HD800s adds gorilla glass to the sides to close off a lot more of the sound. I will be comparing these to the other closed-backs I have/recently had like the Sony MDR-Z1R (Z1R) and the JM Audio XTC-Closed (XTC-C.) The question here is whether these are worth a grab over the cheaper headphones listed above, or more expensive options like the Stellia. If you don’t feel like reading my ramblings below – you should, this is a complicated headphone.

820 Top.jpg


Build Quality / Comfort:

Sennheiser usually makes pretty darn good quality headphones. The HD820 comes with aluminum ear cups that are easy to rub the anodizing off of, cheap-feeling plastic headband pieces, and easily scratchable plastic on the headband. The ear cups also have a ribbed metal part that collects grime easily, making it hard to keep these clean. It’s nowhere near the quality feel my Momentums had back in the day. The gorilla glass feels really good quality and tough though. So, build quality is just OK – but is unlikely to fall apart or break. The cable is nice and thick, with no discernable microphonics, and comes in a 6.35mm plug size.

Comfort is OK, not the most comfortable, but not bad either – the ear pads are huge, so not even Dumbo's ears will touch the pads. The headband doesn’t maintain the setting you put it at (at least on my used pair.) Head clamp pressure and the headband are both decent, but not as comfortable as the Z1R or the XTC-C. I feel the top headband could become a hotspot over time, but that’s fixable with a headband cover and by lifting the heavy cable off the floor to rest on the desk.

820 Right.jpg


Sound / Source / Comparisons:

I’ve posted the frequency response graph from rtings.com to highlight how weird the frequency response on these headphones is. It’s not every day you see a bass response that has a peak in the high-bass and then a drop in the low-mids this sharp. It’s some weird tuning for sure – especially considering the massive drops in the treble as well. Audio Science’s frequency response charts is even more bizarre with more valleys and mountains than California – Crinacle’s graph isn’t much better. Ok, enough with the squiggly lines, how do these actually sound coming from my Burson Conductor 3X Performance (3XP) – 87/100 on low gain?

HD820.jpg


I don’t like breaking down headphones by each frequency since every song has bass, mids, and highs. So, I will start with bass-heavy songs, and break down each song by how all the pieces are presented. You can find my Tidal test tracks playlist in my signature if you want to compare them to your headphones. The first bass-heavy song I am using to test with is Skrillex’s “Scary Monsters and Nice Sprites.” The intro synths come in cleanly with an excellent soundstage and the bass and sub-bass are there with good rumble and detail, but more muted than on the Sony MDR-Z1R and JMA XTC-C. These headphones respond really well to more power, but if you turn them up to get more bass, the mids can start to become sharp and metallic. The vocals, which are pretty sparse in this song, come in cleanly, but further away in the soundstage – instrument separation is really good though on these, with excellent layering.

The HD820 is very similar in its technical capabilities to the Sony MDR-Z1R, but with a more subdued bass and better (less sharp) highs. The XTC-C has a smaller soundstage and less instrument separation, but better detail, closer mids, and better quantity bass in this song while using a lot less power (without scaling with more power.) The Knife’s “Silent Shout” highlights a similar experience, with some good quality bass thump, but not quite to the standards of other more bass-heavy headphones. The mids and highs here come in nicely if a little more distant than I prefer. So, despite these missing out on the bass QUANTITY present in some of the best closed-back headphones (XTC-C, Gjallarhorn, MDR-Z1R), the HD820s still have good quality, detailed, and tight bass which can scale up in quantity with more power at the cost of the mids quality.

So then, if they’re not the best basshead headphones, how do they do with mids? For a mids-test song, I am using HIM’s “Wings of a Butterfly.” The intro guitars sound crisp, if a bit metallic, and the bass guitars come in nicely if more forward than some headphones. The XTC-C does guitars better on this song, though the guitars in 3 Doors Down’s “Kryptonite” sound good on both headphones. The vocals are once again clean and clear, though more distant again, whereas the XTC-C has the vocals more to the forefront (my preference.) The soundstage on this song is once again apparent, these have one of the biggest soundstages I’ve ever heard in closed-back headphones. Elliot Minor’s “All My Life” is where the bass/mids power war comes in strongly. At 90/100 power on my Burson, the deep bass rumble at 0:45 comes in weak, but the transition at 1:21 sounds smooth. When I turn up the volume to 95/100, I get that bass rumble, but the transition at 1:21 sounds sharp and the vocals sound muted and the metallic sound becomes more apparent. Listening to the same song on the XTC-C, the bass rumble at 0:45 is perfect at a reasonable volume and the transition at 1:21 has no issues while maintaining a good balance and avoiding the metallic sound.

Switching over to Demon Hunter’s “I Am a Stone”, the bass and strings once again come in at the forefront (sounding like they’re behind your head – awesome spatial.) They are a bit overwhelming in a song that should have the vocals and strings more forward - displaying more reverberation than I would expect in this song. The highlight of this song should be the violin and the vocals, but they really take a back seat, and the bass overwhelms the song more than it should (confusing tuning). The XTC-C has a lot of that low-end bass, but with a better balance so that the vocals can be heard more clearly – I wouldn’t say any of the closed-backs I have manage to do this song justice though - the XTC-Open/Ether 2 are significantly better at representing this song (both open-back.)

To test the highs, I switched over to Michelle McLaughlin’s “Across the Burren” as a very high’s intensive song that a lot of headphones do not perform well on. There is clearly less sharpness in the highs here than on the MDR-Z1R (which struggled with highs.) The song comes across beautifully and only occasionally hits a jarring note combo, which is very rare on this song – so the HD820s do a better job with low-highs than they do on the mids. Moving on to Panic! At The Disco’s “High Hopes”, the soundstage and separation are once again very impressive. The mids maintain their further away presence, but the strings in the background once again come in clearly and cleanly. This song can really highlight sharp “S” sibilance in a painful manner, and while the HD820s aren’t perfect here, they are far better with the sibilant “S” sounds than a lot of other headphones (Z1R.)

The HD820s have less bass than the Z1R, but less sharp highs and similar mids/soundstage/technicalities (mids can sound a little clangy/metallic.) Overall, the XTC-C is better (and cheaper) in most every way except for soundstage and instrument separation, though their highs are relatively comparable, and strings are more forward and clean on the HD820. A quick side note, if you remove these from your head, they will act like speakers and be quite loud, so don’t use them near sleeping people – they also won’t prevent a ton of sound from coming in (poor isolation). A quick note on gaming, which I don’t usually include in these reviews, but the HD820 may be one of the best gaming headsets I’ve ever encountered. The large soundstage and spatial sound placement are awesome for video games – Warhammer 40k: Darktide sounds really great with these on.

820 Left.jpg


Conclusion:

These are some of the most conflicting headphones I’ve ever listened to – I go back and forth between really liking them and finding issues. On the one hand, they can sound excellent on some songs, even beating the XTC-C. Then, on the other hand, they’re missing some of the bass that the XTC-C highlights so well and they can have a metallic twanginess in the mids that the warmer XTC-C doesn’t have. The highs are less sharp than the MDR-Z1R, but they are missing the bass the Sony has also. They have an excellent soundstage and good instrument separation – though they are not your best option for keeping your music in or the outside world out. But y’know what? If I turn the volume down and stop trying to analyze them, they are a fun listen and it’s hard to be mad at them. If you’re a gamer who wants good headphones to play with and listen to music too, these may be the best.

You can buy them from Amazon here: https://amzn.to/3HurGbg


Headphone Scoring - Each category can be split into quarter points:
Build Quality
0.5​
Design
1​
Cable
1​
Case
0​
Ear Pads / Tips
1​
Comfort
1​
Lows
0.5​
Mids
0.75​
Highs
0.75​
Price
0.75​
Total:
7.25
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tutetibiimperes

100+ Head-Fier
Beautifully Unique
Pros: Extremely Comfortable
High Quality Lightweight Construction
Satisfying Bass Extension
Excellent Soundstage and Imaging
Cons: Unique Frequency Response Doesn't Play Well With Some Music
Bass can be Boomy
Balanced Cable Uses Pentaconn Connection
Lack of Travel Case
Thank you to Sennheiser for sponsoring this tour and allowing me to spend two weeks with the HD820. This has been the longest experience I've had with an 8-series headphone from Sennheiser, having previously only experienced the HD820 and HD800S briefly at Axpona in 2018.

Associated Equipment

Source: Bluesound Node 2i with Apple Music Lossless and FLAC CD rips off of USB stick
DAC: RME ADI-2 DAC
Amps: Schiit Ragnarok 2, Bravo V2

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Build, Presentation, and Accessories

The HD820 is made predominantly of plastic, but plastic often gets a bad rap. High quality plastic, such as what's used in the HD820, can feel as premium as wood or metal, and that is absolutely the case here. There is no creaking or unpleasant flexing, this headphone feels solid like it will last for decades if taken care of.

The headphone comes in a high quality cardboard display box with foam cutouts that hold it securely. At this price point a true lockable storage/travel case would be a welcome addition however.

cupos.jpg


The pads are of a hybrid design with a velour surface that touches the face with leather surrounds. They're much larger than what comes on many headphones which came as a welcome surprise, making this one of the few headphones where my ears did not rub up against the inside of the pads while in use. Clamp force is also rather light, which combined with their light weight make these exceptionally comfortable headphones.

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The more notable design feature on the HD820 are the gorilla-glass panels on the outside of each cup. Designed to reflect the backwave in such a way that it doesn't create destructive interference, they're also look quite striking giving the HD820 a very futuristic aesthetic, though they are fingerprint magnets.

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The major complaint I have about the design of the headphone is with the proprietary Sennheiser headphone connectors. While Sennheiser is far from alone in using proprietary jacks, these connectors require more force to remove than should be necessary, and they make finding alternative cables more expensive. Going with a mini-XLR on the headphone end would provide just as secure a connection and also give much greater flexibility when it comes to aftermarket cables.

The cables that do ship with the headphone feel high quality, pleasingly thick with a nice cloth wrap, and are of excellent length, both being 3m. One problem, at least IMO, was the decision to ship a balanced cable with a 4.4mm Pentaconn connector instead of the much more common 4-pin XLR termination. While I can see the appeal for a Pentaconn connector on mobile DAPs, it has no business appearing on desktop products, and the 3m balanced cable is clearly not intended for mobile use.

Sennheiser used to include 4-pin XLR terminated cables on their products, and IMO this is something they should do again, or at least offer it as an option. At the price of this headphone it should even be possible to include three cables - perhaps a 3m 1/4" terminated cable, a 3m 4-pin XLR terminated cable, and a 1m Pentaconn terminated cable for mobile use.

Sound

The HD820 is notorious for having a rather unique frequency response, so I was very curious to hear it for an extended period with my own ears.

What immediately struck me was how detailed the sound was, some of the most detailed sound I've heard from a dynamic driver headphone. The soundstage is also wider than any other closed back I've heard, with imaging that's sharp and focused, creating a nice three dimensional sound field that can place instruments and voices in front of, above, behind, below, and to either side of the head.

Bass

The bass response out of the box is more prominent than many other headphones. There's a solid sub-bass emphasis that gives a nice amount of rumble to tracks with EDM bass or pipe organ, as well as a mid-bass hump that gives drums impact.

While on the above-average side when it comes to detail in the bass region, I did hear it occasionally become boomy and a bit hollow sounding depending on the track. On music that has complex production combined with a boosted bass track found in some modern pop such as BVNDIT's Jungle the bass could become uncontrolled and overshadow other elements of the production.

I also noticed that in certain acoustic tracks, such as Alison Krauss and Union Station's The Road is a Lover certain notes in the bass line would be emphasized over others, giving a somewhat uneven response.

Midrange

Midrange performance was excellent, with some of the most beautifully rendered male vocals I've heard on any headphone. One of the tracks on the Sennheiser supplied HD820 playlist, Chris Jones' No Sanctuary Here was new to me but left me speechless from how spacious and realistic the voices were rendered.

Another Sennheiser provided track, Manha de Carnaval, showed excellent timbre in the guitars with great detail in the finger action on the strings.

One area that I felt could use some improvement was in how female vocals were presented. On tracks such as Dreamcatcher's Locked Inside a Door or Hwasa's LMM the focal line felt more distant and less prominent than I'd ideally prefer. This may be an artifact of the tuning meant to create a more spacious sound, however.

Treble

I have no complaints with the treble response. Listening to Bach's Passacaglia and Fugue, Charles Ives Symphony No. 2, and Rimsky-Korsakov's Scheherazade the upper harmonics of the strings and brass all felt airy and open and never wandered into harshness.

Soundstage and Imaging

These are the raisons d'être of these headphones. The open-back HD800 and HD800S are widely known for their performance when it comes to a huge wide-open soundstage, and Sennheiser has done an admirable job of translating that into a closed-back headphone. While I wouldn't say it beats all open backs I've heard, it does beat a good many, which is a phenomenal accomplishment for any closed back headphone.

Imaging, while not quite as phenomenal as some headphones I've heard such as the Audeze LCD-5 or Beyerdynamic T1.2, is still very strong, leading to some fun moments in pop tracks and a realistic sense of space in orchestral works.

Pairings

While I ran the HD820 predominantly off of my Schiit Ragnarok 2, I did give it a whirl directly out of the headphone jack from my RME ADI-2 DAC as well as through a budget tube hybrid amp I happen to own, the Bravo V2.

I could not hear a major difference between the Ragnarok 2 and the RME's direct headphone amp on this headphone, likely because it's rather sensitive and doesn't require major current to get it going, though I would say bass and dynamics out of the Ragnarok 2 were superior.

The Bravo V2 resulted in a loss of fine detail but added a sharper edge to some music, making the HD820s feel more aggressive to a degree. While this was pleasant I felt that the loss of detail wasn't a worthwhile tradeoff.

Comparisons

Dan Clark Audio Ether CX


Another premium closed-back design with a high-quality futuristic lightweight design, and another that excels for a closed back when it comes to an expansive soundstage, the similarities end about there.

While the HD820 has an esoteric frequency response designed by Sennheiser to highlight music in a unique way, the Ether CX is devoutly neutral. While the HD820 is a high impedance design that can happily chow down on some tubes, the Ether CX is a very low impedance current-hungry design.

Stock vs Stock the HD820 has a more friendly tuning, as the Ether CX comes across as extremely bass light without EQ. The Ether CX brings female vocals more forward compared to the HD820, and when EQ'd can easily reproduce the same amount of bass quantity as the HD820, with added control and quicker decay as well.

In terms of build quality I'd call them comparable, whether high quality plastic and glass in the case of the HD820 or carbon fiber and high quality pleather in the case of the Ether CX, both feel premium in their own way.

Comfort however goes to the HD820, with it's larger more breathable cups, and less fiddly headband.

Focal Celestee

Focal's high-fashion premium closed back offering is striking in a very different way from the HD820, which plays to the more Teutonic aesthetic of form following function.

The Focal is an easier headphone to drive, easily being driven by an Apple Dongle from a mobile phone to volume levels beyond what would be safe, and has a more pleasing frequency response out of the box to my ears, being smoother overall with a tasteful bass emphasis combined with a smooth and forward upper midrange.

Comfort is comparable, the extra room in the HD820 pads is nice, but Focal's high quality leather hybrid pads are buttery soft, and Focal's headband design has always been one of my favorites.

Where the HD820 shines heads and shoulders above the Focal is in terms of its spacious sound. The Celestee is intimate to a fault. While excellent for pop tracks, it falls apart when asked to play orchestral music of atmospheric live jazz, areas where the HD820 shines.

Audio Technica WP900

Perhaps a slightly less obvious comparison as the WP900 is designed as a portable solution first and foremost, they're both premium closed back designs, taking different routes to get there, with the HD820 focusing on the hi-tech and the WP900 focusing on old-world craftsmanship.

There's a similarity between the two when it comes to the bass, with both having a boost above normal, though the WP900's bass boost is a broader plateau without the dips found in the HD820.

The WP900 also excels when it comes to upper midrange and treble, presenting a forward and clarion-clear vocal presentation with a pleasant amount of zing and edge to female vocals, brass, guitars, and strings.

The HD820 presents a much larger soundstage, the WP900 is rather intimate in that regard, and also beats the Audio Technica in terms of comfort, those huge pads and wide headband being easily preferable to the just-large-enough-to-not-be-on-ear pads and super-thin headband on the WP900.

Conclusions

I enjoyed my time with the HD820, leaving quite impressed with Sennheiser's engineering skills to create a closed back that can isolate you from atmospheric noise, and isolate those around you from what you're listening to, while still delivering the spacious sound of an open back headphone.

The bespoke tuning, however, does occasionally run into trouble with certain songs and certain genres, seemingly being more at home with less-busy tracks.

If you predominantly listen to acoustic, orchestral, jazz, and simpler-produced pop tracks and need a closed back headphone this one deserves a solid look.
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xingfei
Nice review, but if the SONY MDR Z1R came also with a "traveling case" Then you could imagine the price increase it would bring to the already expensive headphone, So saying and giving it a 4 star review(1 Star off)/a con, simply because the Sennheiser HD820 does not come with a "carrying case" is 'silly', because on top of the original price we would see an increase on this headphones MSRP, which people were already complaining when the headphones came out. So even if the HD820 came with a "portable case" It would not be wise to be wearing this headphones on the street, have you seen the news? World is going mad.
You are missing what this headphones are being targeted to and their usage.
ralphp@optonline
ralphp@optonline
A very nice and wonderfully written review. I own the HD 820s and I agree with most of the points raised in the review. I was super impressed with tutetibiimperes' writing skills. Bravo!
T
tutetibiimperes
@xingfei

That's not the only reason, as I noted the strangeness in the FR, while it works very well with some music, isn't universally suited for all, and the potential for boomyness in the bass and odd decision to ship with a Pentaconn cable instead of something XLR terminated for balanced use also play into it. I do think that at the price point a carrying case should be standard though. Focal manages to do it with their Celeste which costs much less and is also made in Europe, as does DCA with their Ether and Aeon series headphones, which also come in at lower price points.

Comments

fluteloop

Formerly known as Drumkrunk
I said what I wanted to say and I feel that these look amazing and I waited forever for a closed version of the 800's, I think i'll have to get the open back now and try and trap some sound leak via modifying.
 

TimSchirmer

Repelling digital infidels. (Would that be called the Digifadah?)
Yep gotta keep those new versions coming. Headphone making is a lot like textbook publishing I guess.
 

PACSman

Head-Fier
Nice press release. I owned the HD800 and could never resolve the EQ problem (some say it is a recessed mid which exaggerates the 6khz region). It was also very uncomfortable on my head. After 40 minutes of listening, the vice from my head had to be removed. Lastly, the HD800 needs a very good headphone amp pairing. Although I loved the HD800 for nearly three years, I couldn't live with it and I had to let it go. I anticipate the HD820 being great and that might be the biggest problem for me. Sennheiser sets expectations incredibly high.
 

xevman

100+ Head-Fier
What's the difference with the HD800 S, besides the glass cover? Why $1000 more expensive?
Its the trend the headphone manufacturers are heading. With these flagships getting more and more expensive like the LCD-4 and Utopia it only makes sense that Sennheiser did the same. If the HD800 and HD800s came out today I'd willing to bet they would be priced at over $2500 USD.
 
What's the difference with the HD800 S, besides the glass cover? Why $1000 more expensive?
The HD800 has long been priced far below what it could be on the market. It is one of the better bargains in HeadFi. I think the $1000 price hike is due to several factors: significant R & D, keeping up with market conditions, and need to have a headphone that is a prestige statement below their HE1.
 

bcschmerker4

That's bcschmerker4® to you!
At Z = 300 Ω, a candidate for monitoring the transmission feed at OMS Japanese Christian. Does the ГENNHEIГER® HD820 have any known incompatibilities with PEAVEY® recording consoles such as the FX2-32? If so, I may have to shortlist a refurb MACKIE®/LOUD Technologies SR56·8 for acquisition.
 
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