Introduction
For the Sennheiser HD598, or any of the HD series for that matter, there’s almost no need for introductions. Asking an audio enthusiast if they’ve heard of any of the Sennheiser open back series, from the beginner-friendly HD518 to the legendary HD800, is like asking anyone on the street if they’ve heard of Taylor Swift, Lady Gaga or Madonna – they’ll look at you funny and ask you, “Are you crazy?”
Of course you’ve heard of the HD598, it’s one of the most popular headphones on Head-Fi for a reason – people love this headphone.
“So Josh,” I hear you ask, “what the hell are you writing this for?”
Simple. I’m here to add my two cents and answer the question you might have – Is the Sennheiser HD598 worth buying?
Despite what some people might tell you, the answer shouldn’t always be “YES”.
Notes:
1) I got my HD598 used in a trade for one of my mechanical keyboards. Other than the headphone, the trader had given me the Sennheiser 3 metre cable and the ¼ inch to 3.5 mm jack. The headphones were, and still are, in perfect working order.
2) When using the headphone, I used the 1.2 metre straight cable that came with the Audio Technica ATH-M50x.
3) All testing was carried out either using my iPhone 5S or through Foobar2000 w/ Wasapi Event > Fiio Q1 as a source.
Sennheiser HD598
Comfort
It shouldn’t come to you as a surprise for me to tell you that the HD598 is pretty darn comfortable. All of the HD series headphones are. The velour pads in particular are just right for the price, soft and breathable but certainly not comparable to pads that, for example, you might find for $60 a pair from Shure or Audeze.
The HD598’s clamp is relatively light and the headphone itself is rather light in weight too. The only gripes I have with the HD598’s comfort lies in the pads being on the shallow side, so your ears might press against the inside of the ear cup or pads. The headband’s thickness also means the headphone tends to press on the top of my head just a little, a somewhat noticeable reminder that I’m wearing headphones – it never quite feels like there’s nothing there.
That said, I’ve worn the HD598 for hours and hours with minimal complaints, so most people shouldn’t have terribly major issues either, just some minor gripes.
Build
What Sennheiser would tell their customers is the HD598 was designed to be as light as possible. “With the right combination of strong yet light plastics, the HD598 were fashioned to be as light and comfortable as technology would allow.” … Or something like that.
What I think is more likely to be the case is that Sennheiser wanted to blow their profit margins through the roof, which is why you don’t see so much as a single gram of metal in the build whatsoever. The HD598 is entirely made of plastic and in my opinion, it feels flimsy, insubstantial, and even a little cheap for its price.
The HD598’s plastic ear cups
For one, I’m almost certain the ear cups would sport some nasty splits and cracks if you sit on or drop the headphones. The ear cup’s swivel mechanism also makes a squeaky noise when adjusting the cups, but thankfully this doesn’t persist once the headphones are adjusted properly on the head.
The headband also doesn’t inspire much confidence in me. I’m fairly certain it’s not metal (certainly doesn’t feel like it), and while you most probably will never have to stretch the headband very wide given the HD598’s very accomodating shape, it’s just the principle of the thing – it would’ve been nice if the headband at least were a flexible metal of sorts.
While I can’t say I expected top notch build given the street prices, especially from Sennheiser and their extraordinary markups, I can also safely say the build was far from blowing me away. Simply put, the build of the HD598 was rather underwhelming, especially when I sat it side by side with the similarly priced Audio Technica ATH-M50x. There’s no contesting it, the M50x kick the living hell out of the HD598 in the build department.
In short, if you own a pair of the HD598, you’re probably going to want to be a little careful with where you place it or how you treat it.
Quick note on the cable, I can’t say it’s poorly built, but the ¼ inch plug definitely makes it a hassle. The provided ¼ inch to 3.5 mm adapter also seems to affect the sound, with what I perceive to be detail muffling and loss when the adapter is used. For this reason, I used the 1.2 metre straight cable provided with the Audio Technica ATH-M50x, which actually fit, much to my surprise.
The HD598 with the 1.2 m Audio Technica cable (a much neater solution)
Buying a new pair of the HD598 Limited Edition, if I’m not mistaken, would also now get you a shorter straight cable that ends in a 3.5 mm jack, so that’s nice to see Sennheiser adding that small touch.
Overall, the HD598’s build isn’t the end of the world or a deal-breaker, but Sennheiser certainly could do better. Improvements in build would definitely be something I’ll be looking out for should the HD598 ever get a proper successor of any kind in the future.
Sound
Some people say the HD598 gives beginners the “true audiophile” experience, especially if they make a significant enough jump from something that was much worse. Truthfully, this statement isn’t exactly wrong, but there are several reasons why a “true audiophile” experience like the one the HD598 offers wouldn’t be the type some people might be looking for.
Bass
Most notably, the HD598 has very little bass quantity, rolling off very severely and sharply from the mid-bass onwards. Though roll-off in the sub-bass is common on open headphones, the HD598’s lacking bass extension is comparatively drastic, even taking into account other bass-shy open headphones. If you’re coming from any typical set of headphones, or even Sennheiser’s lower-end HD518 or HD558, the lack of bass will be extremely apparent, even jarring for some.
Some people interpret the lack of bass to be “tight” bass, but I think I have to say, very respectfully, that I don’t think that’s a very helpful way to put it. The simple truth is that the HD598 has extraordinarily shy mid-bass and pretty much no sub-bass, which means it’s not that the bass can’t really be “tight”, because it’s essentially not even there.
In other words, having very little in quantity of something does not mean it is of a “higher quality”.
That said, there is a decent amount of upper bass, which means male vocalists aren’t anemic sounding and electronic beats, drums and the like can still be heard and sometimes felt, depending on their extension and pitch. Kick drums and deep synth bass, however, would be examples of sounds that tended to be missing from the equation, often needing the bass boost on my Fiio Q1 to come to life and be present in any significant capacity.
In practice, this bass presentation means the HD598 doesn’t have punchy, rumbly or, dare I say, accurate bass. It’s the kind of low-end you can hear and, on particularly powerful bass notes, there’s a little bit of umph to be felt, but the HD598 really is the quintessential Basshead’s nightmare. You hear the bass notes when they come and go, but it lacks presence. It’s really not quite ‘there’, if that makes any sense.
Personally, I don’t mind the lacking bass quantity. To some degree, it’s what makes the HD598 what it is. However, I do wish the bass didn’t roll off so quickly, very much wishing it would’ve extended evenly into the mid-bass at least. I’m not an audio engineer, so I can’t begin to tell you if it’s the housing or the driver design, but something is at fault here and I wish it just had some deeper-digging (not necessarily pronounced) bass to keep things sounding grounded.
Mids
There’s not much to say other than the HD598’s mids are pretty much as close to top-notch as you’re probably going to get at the price. Vocals, guitars, and anything in the mid band is extremely well-articulated and very even, creating a detailed yet smooth experience.
For my preferences, the HD598’s mids are a tiny touch thinner than I’d like, since I prefer more lushness, color and/or energy to my mids. For instance, the HD598’s mids are just a bit thinner than my E-MU Walnut’s, which is, at the moment, the headphone I own that I find produces the most natural sounding vocals. That said, both the HD598 and Walnut produce equally detailed and enjoyable mids, I just have a slight preference for the more bodied and lush E-MU Walnut’s rendition.
With all that in mind, there’s practically nothing to complain about, just some splashiness on poorly mastered tracks. Other than that minor hiccup, the mids on the HD598 are really nothing short of great in its technical ability.
Treble
A lot of HD598 users gush about this headphone’s detail and clarity. I’d have to say their feedback, in this instance, is no lie.
The HD598 strike a very good balance between crisp and detailed, yet not being sharp or painful. The treble is mostly very smooth, with some hotter tracks sometimes producing marginally startling peaks at louder volumes, but nothing close to being tizzy or painful.
The HD598’s treble extension and clarity means detail is very much discernable but never harsh or uncontrolled, a feat some headphones that try to go for detail at this price point like the Grado SR125 and AKG K612 aren’t quite able to do.
The HD598’s treble also means separation is pretty excellent – instruments are very well-blended and easy to discern with well-mastered tracks. Again, with very hotly mastered tracks, separation can get a little smeared, but it’s nothing I think a US $150 headphone should be yelled at for.
Sound Stage
We come back to things I find misleading – some people say the HD598 has a “wide sound stage” and I have to respectfully disagree.
Sure, the AKG K612, when I tried it, produced a wide sound stage. The Fedilio X2, K7xx and *insert other headphones I haven’t heard* might have wide sound stages. The HD598 does not.
Instead, the HD598’s sound stage isn’t very wide, never ‘extending’ beyond the cups, but it does have a height I find very unique – certainly haven’t encountered anything similar in other headphones. This means imaging, for me at least, is confined to a sort of square box, kind of like a picture on Instagram.
In practice, elements in a track, in my experience, sound quite a bit larger than they normally would on headphones of this size. Vocals close to a mic, for example, sound like they’re coming from a mouth stretched vertically. For me, this sounded kind of strange at first but it didn’t take me very long to get used to it. The sort of weird sound staging does not, however, affect positioning. Like I said, instruments are very easily picked out and imaged, just that recordings would perceptually seem to have slightly different dimensions when compared to some other headphones.
Overall Sound
The HD598, despite my waffling about on each component of the sound, is truthfully not difficult to describe as a whole.
The HD598’s goal is to focus on clarity, clarity, clarity. Separation is great, detail retrieval is effortless, instrument placement and playback is very well articulated and never strident, sibilant or harsh – the HD598 is just very nice for painless critical listening. Everything’s transparent, even and defined, reminding me quite often of the audio equivalent of a tastefully detailed pencil sketch.
That said, the sacrifice obviously comes with the bass. While upper bass is sufficiently present, with a decent amount of heft and meat, mid and sub bass is very lacking. To get the most out of electronic music, dubstep, or even some bass heavy rock tracks, the HD598 simply does not cut it without an EQ or bass boost. And even with the bass brought up, it’s not a perfect solution, since I’ve noticed the bass boost on my Q1 with the HD598 can make some (not all) tracks sound just a bit wonky and loose, sometimes producing a strange reverb, trembling sound. The HD598 without EQ lacks warmth and color, again, similar in concept to a pencil sketch.
In short, the HD598’s bass isn’t very good. That would turn a lot of people off, but for those left, the HD598 could still be a very attractive option, taking into account the headphone as a whole.
The Target – Who is the HD598 for?
The HD598, for one, excels at comfort. While the HD598 may be considered a step back in comfort from the HD518 and HD558 due to its overly thick headband padding, it still is more than acceptable for long hour usage.
It’s traditional headband design also means it’s going to be less fussy than AKG’s and Audio Technica’s auto-adjust systems on the K612 and AD900x respectively. Both are similarly priced competitors to the HD598 that I found rather clumsy to put on, given my small-ish head size. So, if comfort is important to you, that’s a point for the HD598 over its competition.
Another point in the HD598’s favor is the Sennheiser name. Being a brand with global distribution, obtaining the HD598 at retail and getting warranty would not be a challenge for most. For those who want major convenience, that’s another score for the HD598.
Finally, the HD598 is just a good sounding headphone for detail freaks. This is a headphone I’d strongly recommend for people to demo first, because people have varied reactions to the lack of bass and detailed presentation. Some people don’t mind it at all, many clearly love it, while I bet a sizable number of people would not find it to their liking one bit.
Is this headphone’s sound for everyone? No, but that’s why it’s kinda cool and kinda special.
Conclusion
The HD598’s sound I felt was quite the unique experience. It wasn’t neutral (if you disagree, sue me), it wasn’t quite lean like an AKG, it wasn’t quite tizzy like practically every Grado, it wasn’t warm and relaxed, and it certainly wasn’t the V-shape signature that most people love.
It was, based on my experience, uniquely HD598.
Zeos of Z Reviews, when describing audio purchases, puts it best, sometimes, you just want something different. And the HD598, for all its minor flaws, is still a worthy headphone in my book.
A more than good option for those who want a crisp, clear but non-piercing or harsh sound, the HD598 is, and probably will be, still a great, easily obtained option for many an audiophile to come.
About Me, Josh Tseng:
A self-proclaimed “boring person”, I’m interested in audio gear, music, current events and having thought-provoking conversations with people I meet. Right now, SoundTown is a personal passion project of mine to improve my writing skills while being able to explore all things audio. I also happen to be visually impaired, which is why music has, for me, eventually become one of the most important forms of media I can consume.
If you want to talk to me, feel free to email me at soundtownmail@gmail.com or you can also find me on Twitter at @JoshSoundTown. PMs on Head-Fi, for now, would be rather challenging for me to access so that’ll have to be something I’ll have to work on. Oh and by the way, all feedback on my writing would be greatly appreciated.
Thanks for reading and happy listening!