Sennheiser Consumer Audio HD 660S2 – Wired Audiophile Stereo Headphones with Deep Sub Bass, Optimized Surround, Transducer Airflow, Vented Magnet System and Voice Coil – Black Electronics

4.0 out of 5 stars

Great sub-base and bass, but lacking mids

I’m happy I bought these headphones for under $400. I would not have paid more than that for them.The sub bass and bass frequencies are amazing on these things, but the upper mids are just not quite there.

5.0 out of 5 stars

A Sennheiser for those who didn’t like the original HD Series

Sennheiser hit the mark on this one. I’ve only owned one Sennheiser, the HD 580, and I had it for 27 years. Veiled and bass shy. Never liked the 600 or 650 either as I’ve demoed those over the years. I love this one after an evening of pure listening enjoyment.The Sennheiser HD 660 S2 has the sound I’ve been looking for. Full sounding, balanced, and just the right amount of detail. All my classic rock CDs sound wonderful.I don’t mind the price for the 660 S2 as I know this will last. My Sundara lasted 14 months…just in time for the warranty to expire. Thanks for nothing Hifiman.I also like that it’s manufactured in Ireland, and it feels like they really cared about this headphone. It’s very comfortable and the clamp was mild on mine, and like my old HD 580, I’m sure it will loosen over time.I won’t give a lot of descriptions on how it sounds. Instead I’ll share my purpose for this purchase. What I wanted was a solid headphone that makes my classic rock music collection shine. With the HD 660 S2 I just throw in a CD, turn up the volume, and enjoy the music.Possible end game obtained. And for me that makes the HD 660 S 2 an enjoyable investment.

14 people found this helpful

5.0 out of 5 stars

Perfect phones

This headphones has changed my life. I have eventually could listen the difference of lossless formats. Besides, I have started listening small artifacts in guitar playing that I have never paid attention on before.

One person found this helpful

4.0 out of 5 stars

Treble was off to me.

I thought the treble had some harshness to it and for the money my Sennheiser 599’s sounded so close to it that the money was not worth it. Confort was not an issue however as with most Senn’s.

5.0 out of 5 stars

Excellent

Very accurate audio. Excellent for music production and listening to the details such as the attack of a note or overtones generated.

5.0 out of 5 stars

Almost Returned Until…

The Sennheiser HD 660S2 is surprising right out of the box. They sound more like a reference/analytic headphone, not a pair of cans the casual listener of pre-recorded music might expect. You’ll hear just about every engineering and production intent in the source file. If you have wireless earbuds, you’re not likely to hear these small details, no matter what codec you’re using. The 660S2 brings out all the things I never expected to hear, which is frustrating and insightful at times.I was not a fan of these cans upon my first listen. The midrange was horrible. The sub-bass you’ll read about is negligible. I own a small FiiO BTR15 for high resolution music, although I still question its usefulness as we can not hear above or below a certain frequency range. Perhaps I’m wrong about what 192KHz can deliver to the listerner because I always take advantage of HR in apps like Tidal with the 660S2. I travel and work with TWM 4 (massive improvement over 3,2 and 1) or Apple AirPods Pro 2. I’m fine with either.I hung on to the 660S2, hoping I might find an app to tune it to my listening pleasure. SoundSource definitely helped. I find the word “audiophile” meaningless. I love music and paid $800 for a pair of wired Shure’s several years ago. They were not worth the cost, especially with my iPhone and streaming. The 660S2 stays at home. They’ve become precious and still provide a glimpse into the engineering process.

One person found this helpful

5.0 out of 5 stars

The Best Headphones I have Ever Laid Ears On

Music, and audio in general, have always been a great interest of mine. Growing up I would lay in bead with my eyes closed listening to music, and nowadays I am listing to music all day during work at my desk, and playing video games in surround sound etc.These are by and far the greatest headphones I have ever owned, and I believe they justify the price. Prior to these, I had been using a combination of AirPods Pro 2s, AirPod Max, and Sony XM4s for music, and Astro a40s wired headset for gaming. These headphones blow all 4 out of the water and it’s not even close, I would say they are at least 2-2.5 times clearer than any of these other options. The bass response is PERFECT, not too much, but a lot more than you would expect from open back neutral headphones, while still remaining very balanced. It is difficult to describe, you have to experience it, but the sound stage and instrument/vocal isolations that take place within these headphones is dream-like.Of course, all of this is pointless if you are not playing from a decent source. I personally use a few options; I plug directly into my 2024 14 inch MacBook Pro which has a notoriously good DAC, and into my iPhone 15 Pro Max using the Apple USB-C to 3.5mm which is actually surprisingly capable. I am using Apple Music set to Hi-Res Lossless, and it is flawlessly clear.For Gaming, I actually am plugging these into an Astro MixAmp Pro TR, and it works surprisingly well. Not quite as good of a sound as my Mac or iPhone for music, but with a little EQ they sound amazing for games and the soundstage is tighter than a gaming headset, but open enough to still get that ambiance feeling and great sense of direction with all sounds.TLDR, I use these headphones for everything from gaming to music to movies, they hardly leave my head. For me personally, it really does not get better than this.

5.0 out of 5 stars

Great Cans

These HD 660S2’s work excellently with my DAC. Would highly recommend them as they sound good with any genre of music. The price is great too!

5.0 out of 5 stars

Good sound for long listening

I like all my Sennheiser headphones, and these produce great sound for hours-long listening while I work on my computer. The sound is greatly improved by a high quality DAC/Amp.

5.0 out of 5 stars

OK

OK

5.0 out of 5 stars

HD 660S2: Sennheiser’s Audiophile Masterpiece

The Sennheiser HD 660S2 is a remarkable achievement in audiophile-grade headphones. Building on the legendary HD 600 series, these open-back headphones deliver an incredibly natural and immersive listening experience. The redesigned 38mm transducers with optimized airflow and a vented magnet system produce exceptionally clear and detailed sound across the entire frequency spectrum.One of the standout features is the enhanced sub-bass response, which adds depth and richness to the audio without compromising the overall balance. The 300-ohm impedance and ultra-light aluminum voice coil ensure excellent impulse response and precise sound reproduction.Comfort is also top-notch, with plush ear cushions and a lightweight design allowing for extended listening sessions without fatigue. The build quality is outstanding, reflecting Sennheiser’s commitment to craftsmanship with these German-designed, Irish-made headphones.For audiophiles seeking a warm, intimate sound signature with improved bass extension and exceptional clarity, the HD 660S2 is a worthy investment. These headphones offer a deeply engaging listening experience that brings you closer to your music than ever before.

10 people found this helpful

5.0 out of 5 stars

Absolutely Great Headphone. Please read.

There are plenty of opinions on this headphone all over the internet. None are bad, but some are pretty negative. Mainly because from what I am seeing, the reviewers are reviewing the price, not the product. They are saying, you get almost as good performance from model/Brand A or B for less money, focus on the ALMOST. While yes it is true, at $600 is expensive, but make no mistake about it is does out perform other headsets in many areas. This headphone is on sale for $100 more than the HD650, which is $100 more than the HD600, so this falls right in line with Sennheiser pricing structure now, and rightfully so. I don’t think it is double or triple the other two 600 series headphones, but it is IMHO is a much better headphone, and worth $100 more. Literally, if you are looking at the 600 or 650’s and aren’t sure which sound signature is for you, get this one if you have the budget, or wait a little while and save for it… It is worth it. It has the best characteristics of both, which you can see some reviewers stating this. I believe it was Josh Valour who said it, but I do disagree with something he said, it was something along the lines that is in between both models, and a jack of all traits, but master of none. Well, it is a more well rounded performing headphone than both of those and I believe it Masters an overall warm, smooth, well defined, spacious sound with impeccable imaging. For me and my taste it is the PERFECTING SOUNDING HEADPHONE, and exactly what I was looking for. No headphone is the everything to everyone. So be honest with yourself on what you like, based on your ears, and not popular opinions, even if it is from experts, which they are, I am not disputing that at all. I am pretty new to the whole audiophile thing. One thing. But, I have learned that you really need to spend some time with the equipment to let it sink in and let your hearing mature to the product at hand. I realized this, when I purchased the Harmnicdyne athena, reviewers raved about them. It sounded like the overall characteristic I like so I decided to give it a try. I received them, put them on and listened, I was horrified. What I hadn’t realized was that my hearing was skewed by listening to the hd560s so much (I really enjoy that headphone). Doing A/b comparisons only made it worse for me. So, I decided to force myself to listen to them. So, I did, I listened exclusively for 2 days, and when I would take breaks and come back and listen to the Athena I was truly amazed at how much I LOVED THEM!!!It is really hard to compare headphones; they all have their own characteristics, just as we all have our own opinions and tastes. So, I believe headphone reviewers have a very difficult job. As some of us expect them to tell us what is “BETTER” headphone A or Headphone B, it just isn’t that simple. Headphone A might be better for you, but headphone B is better for me. That is the beauty of this hobby. There is no right, or wrong, better or worse. Just learn to appreciate what your ears tell you and take all other opinions with a huge “GRAIN” of salt. Josh Valour, DMS, The Headphone Show, The Source Audio Video Group, and some others, does a great job of describing the products and giving a sense of how the product is. I watch way too many reviews. LOL. I Hope this helps someone else on the audiophile journey.Here is my current stuff incase anyone care to see. I literally started with headphones and amps a little less than a month ago. The gaming headsets, I have had for about 6months to a year, that is what started it all. I have the HD560s, HD 660s2, Hifiman he400se, Harmonicdyne athena, I am using the IFI Zen air line of products, the Air dac and Air can, both awesome to start with, and you probably won’t need to upgrade for some time, key word is need, want is different. lol. For gaming I use the PC38x Sennheiser/epos, the epos H6Pro, Steel series Nova Pro wired with DAC. Sennheiser Game zero, and Audeze PenroseX, Gaming Dacs are the sound Blaster GC7, and G6 love them both but prefer the GC7 in case anyone is looking at the two.Good luck, and good listening!

68 people found this helpful

4.0 out of 5 stars

Blows $400 Gaming Headsets Away!

I mainly use headphones for gaming, music, and movies. I’ve had 4 different pairs of Astro A50s for the past 8 years because they were the best gaming headsets for sound quality that I tested. After years of hearing about studio or high end headphones being better, I decided to get these on sale for $390.I have them plugged into a sound blaster G6 dac/amp on my PC. I have the G6 set to high gain at about 30-40% to push max power to the headphones without having hissing or distortion. These things get LOUD with the headphone volume only at like 30-50%. The original sound/flat EQ is easy to listen to for music or games, but obviously you want to use an EQ for enhancing bass for many games. People complaining about needing to use an EQ for different music or games are idiots. No headphone is gonna give you the perfect amount of lows, mids, or highs for every audio source you listen to.Now, back to the EQ. The Bass sounds VERY good when set to the right levels using an EQ. Explosion heavy games like Helldivers 2, Space Marines 2, CoD, you name it, you can set the bass to sound very punchy and thunderous. I mean it blows the Astro a50’s away so bad that it’s crazy I’ve spent over $1000 on Astros in the past 8 years vs just getting a high end headphone like this.Comfort is not as good as the Astro’s but I’ve only had them for 5 days. They grip more than you’d probably like for the first few days. I’ve gotten more use to them now though where I can wear them for 4 hrs+ without having to take them off for a break. It just needs time to be broken in.So to wrap this upComfort – 4/5Sound – 5/5Price – 5/5 I’d say worth every penny if bought at $380-$500 value.Get a nice dac/amp like a soundblaster G6, learn to play around with equalizers (you can save profiles for every game/genre of music using sound blaster command center.) AMAZING!!!

2 people found this helpful

5.0 out of 5 stars

It’s magic: enter the concert hall

Update on August 9, 2024:The iFi DAC combined with the iFi Zen Can produced clear sound and proper dynamics, but human voice sounded feeble and harmonics were missing (that is, a concert piano sounded like an electronic one).I figured it was the amplifier, not the headphones, so I gave a try to an XDUOO TA-10R, which is a hybrid headphone amp, using a balanced tube and Class A amplification (USB, optical, RCA, and coax inputs, a pseudo-balanced output that still sounds better than the 6.3mm unbalanced one). Once I swapped out the factory tube for a Gold Lion, the sound stage opened up, human voice became full, and the harshness around the high C vanished. Even poor recordings (uncompressed) sound good, providing a lot more presence than I experienced from the iFi combo.Original review from May 24, 2024:Every time I put them on, I feel mesmerized. Have never had this experience with any other headphones; it’s like the music comes to life around my head, as if I was present at the performance. Granted, that applies mostly to classical music, and the sound can easily bring tears into my eyes.Still, these babies produce excellent sound for everything I’ve put on them. I’m not a gamer, so I can’t comment on the gaming performance, but there is at least one 5-star review on that subject.Anyway, beyond the subjective, sources and recordings are also essential to consider as well as the connections, so let me submerge into those details.Good headphones are no good for compressed sound, but plenty of headphones are made for such a clientele. The s2 with its refined sound is targeting an audience that cares for the original sound.Please, notice that when people “burn in” new equipment, during much of that (except for diaphragms in speakers), what happens is that the components adjust to each other, especially on the analogue side. The outcome ultimately determines if their combination is feasible or not. My current setup has been serving me well in the last five years or so, so I haven’t made any changes.I used an iFi Zen DAC v1 (from the USB port on computer) and an iFi Zen Can v1 (on the RCA input from a relatively high-end LG Blu Ray player from the optical port through a digital-to-analogue converter). Connected the DAC with the amp through their balanced ports with a short decent balanced cable. Both amps were hooked up to the sources with SVS interconnect cables. Didn’t use the “Trubass” feature on either one, because for my taste, it upsets the sound balance (the DAC also amps the bass at a higher frequency than the amp). My sources were the usual high-resolution recordings (both pop and classical) and Blu Ray movies I use for testing new components.The most prominent strengths of the s2 is extended bass and an adherence to the original sound signature. While the OEM cables are fine, out of the two supplied, I favor balanced one. I have found a purchase for a previous Sennheiser that didn’t work out at the time giving me better resolution. Amazon is still selling it: KK Cable II-SO. (Added on 6/28/24: for movies, the original balanced cable works better; the KK produces less bass in return for better instrument positioning, and dialogues suffer from human voice being elevated around 500Hz, which makes conversations harsh and unpleasant to listen to. The original cable goes deeper, although perhaps a bit muddied in the lowest end, but conversations are clear). The only problem with the extended bass is that the housing loses a little control over it beyond a certain (obviously VERY high) volume, so I can sort of feel the ear cups moving, which breaks the illusion of being present. This is probably the main reason why the pressure around the ears is relatively high (and loosening it might not be the best idea).The s2 might not be the best for someone with a large head (it might feel uncomfortably tight) or unusually large ears that the ear cups cannot cover, and it took me a few days to get used to it, because I am on the high end of average head and ear sizes.The included bag is a plastic dust collector; I am using an anti-static bag instead. Hard cases are available for transportation, but the original box works for that, if only on occasion.As opposed to the planars I’ve heard (Moondrop Para and Hifiman HE400se, but others report the same problems with lot costlier planars), the s2 retains the familiar sound on the recordings I usually use for testing new equipment, and it extends the listening experience in gentle, but important ways. The bass reverberates in the concert hall, and is not victim to extensive channel separation. Even harmonics play the same or better than on anything else I’ve heard in this price range or below, although this is a feature that can warrant higher investments. No problem with high-pitched human voice being harsh and sibilants don’t suppress other frequencies; the performance is actually toned down a bit in order to retain the sound that recordings must have been meant to sound like. In my understanding “warm sound” is often used for describing the feature, perhaps because no highs and mids dominate at the expense of the bass or each other. Despite the somewhat reserved (but not veiled) presentation, the dynamics don’t suffer.I believe, the secret is ingenious engineering that uses physics: the proper driver and built-in sound paths in the earphones. Many other headphones have built-in electronics in the sound path, allegedly, to protect the user’s hearing, but to me, it seems more like protecting the drivers from overload. Consequently, the s2 doesn’t clip at low bass (emit a clicking sound, while cutting out the sound), while most the sound is there in that region, too. The headroom is like sitting in the concert hall, albeit a bit further in the back that the eight row, but the sound image remains steady at various volume levels. To me, the harmony and the unity of the sound, along with the original sound signature, is worth the price.

4 people found this helpful

5.0 out of 5 stars

I love them! fantastic for music movies and gaming! great bass!

looking for a pair to enjoy music movies and game with.my first pair of sennheiser headphones was the GSP 350 Gaming Headset. i got them for the mic quality. outperformed every other brand on the market at the price range. my upgrade was the game one. they were my favorite headset. soon after i got a nice xlr mic and an interface. after about 3 years of use the cable port on the headset failed. no sound on left ear. have to push on the cable for it to work. after a few more days it failed completely tried aftermarket cable no help. i have also been looking for an excuse to upgrade them for a while now too.i have spent hours and hours on reviews of headphones on youtube and online forumsand keep seeing Sennheiser holding its own in a lot of the categories.so i decided to get a few different brands that peak my interest and give them all a test. out of every brand these are my 100% favorite.i notice a lot of headphones cause my ears to overheat after only a few min of use. this was never and issue with my game one headset. would wear those for hours gamingthey do have a decent clamping force out of the box. ill have to put them over a cardboard box roughly the size of my head while im not wearing them to break in faster.im running these with an evo4 interfacethey sound phenomenal!They dont have a lot of bass out of the box. Buti ran an an eq on my pc with a bit of gain on the 25-100hz range. at max volume they can handle the push! equalizer apo 12.5 on the 25hz. sounds great with minor distortion on some bass heavy songs. but i think they sound best at 6-8dbmy other headphones start to distort at half the eq gain.my last test will be getting a pair of 600 and 650 serries to see if its worth spending the $100 and $150 difference.i also got a pair of hifiman sundara to compare within my opinion its not even a fair fight. i hated the sound. went through an entire playlist and couldn’t enjoy anything. maybe im just too used to the sound of Sennheiser headphones. also absolutely no bass! even with an eq i had to keep them at low volume or they started to majorly distort.tbh i was very disappointed had high hopes considering all the positive reviews. maybe its my amp or just personal preference here.

5.0 out of 5 stars

If the HD600 series are like Cheetos then the HD660S2 are the XXtra Flaming Cheetos

I know there are many good and professional reviews of the HD600 series out there so I am not going to repeat what other people have said many times.So here is my own silly opinion:I do own several HD600 series, namely HD58x, HD6XX, HD660s and HD660S2.To me they are all like Cheetos, either you like the rich cheese flavor (smooth mids) or you don’t.If the HD600 and HD660S are like original Cheetos and Cheetos puffs, then the HD58x and the HD6xx would be like the spicy Cheetos and spicy Cheetos puffs (more exciting in the low ends). By the same analogy the HD660S2 would be like the XXtra Flaming Hot (More bass extension/more exciting) but in the end they are all Cheetos.

5.0 out of 5 stars

The best sounding headphones I’ve ever had

Even though many reviewers said HD 6XX sounded better than HD 660S2, I personally prefer the 660S2 by a mile. I love its sound imaging and stage, and it has better bass. I tried a lot of EQs on AutoEQ for both headsets, but I like the default tuning best in both cases. I can definitely see why some people prefer the 6XX/650 over 660S2, but my suggestion is listen for yourself before deciding because everyone’s taste is different.

One person found this helpful

5.0 out of 5 stars

SENS are awesome!

This is the best set of cans I own. I love them.update. 12/8/23. break them in. Its not a myth. they get better and better. I now own A few more sets of cans and these are still my favorites. Ive got sundaras and a cheaper set of Amazrocks and a set of Senne 599 se. All are good. All are different. These are my weekend cans. When I dont want to mess with the neighbors I throw these on and go to the concert. Youve got to try these if you like rock. Loud and clear. Just dont fall asleep with them on loud like i did, I rang for like 2 days.

2 people found this helpful

5.0 out of 5 stars

Sennheiser HD 660S2 – Simply awesome!

I believe I have four of the best Sennheisers, 560S, 650, Drop 6XX and now 660S2. I have paired each of them to different DACs. This one for now is paired with a Cocktail Audio N15 Novatron steaming headphone amp. It sounds awesome and looks gorgeous with the bronze accent. I picked this up during Prime Day sale. You can’t beat it. It’s back to $599. I just listened to Now & Then by Carpenters, “The End of the World” track . It’s mind blowing how good these sound and does justice to the track. Tight bass, crisp highs and clean mids. It’s subjective to each listener based on their choice. Mine is being streamed from my media server using JRiver Media Center 30. They all come together super nicely. These cans are 300 Ohms and the Novatron drives these pretty easy. Hope this review helps!

6 people found this helpful

5.0 out of 5 stars

Incredibly lush sound

I’m no stranger to high end headphones. I would put the Sennheiser HD660s2’s into middle territory in the realm of high end. Sure, you can get better headphones for a lot more money and of course how much you enjoy them will be subjective, based on what YOU like in headphones. Me? I like warmth and that lush gray V sound Sennheiser has mastered.These are quite comfortable once I gave the metal bands a little bit of a stretch. Just extend the cups and then grip the metal bands between thumb and forefinger. Give them each a little push. Don’t get crazy. Apply as many times as needed.I have other open back headphones. One of my favorites is the Audeze LCD-2 classics. They sound amazing, but they are huge and heavy. The HD660s2s are a lot lighter. I can wear them for hours. These are connected to a DAC with a sabre chip. That, in turn, runs to a great little tube amp made by a local Seattle company called Ampapa, that in turn hits my DROP+THX AAA 789.Music is HUGE on these things. I’ve been using them daily for a month. In fact I reach for them on my wall of headphones more than any others. Gorgeous sub bass. Mids are gray and V – love it. Treble is nice and sparkly.Frankly, I was ready to be disappointed in these, but I was not at all. I was careful when I opened the box and bag so I could send them back. Not necessary!I’m listening to some old Rush on my Victrola record player as I write this review. Overall, I am blown away by how good these sound, and how much I love listening to them.

10 people found this helpful

5.0 out of 5 stars

Great headphone, but……

Love this product and HD 600 I replaced with these. However, there is one design flaw that needs to be addressed. The cord is absolute crapola. With time, and not much time, the sound will suddenly degrade and you will lose sound from one side. I use my headphones continuously and the cord tends to twist up as I toss them on my desk through the day. It must break down the inner connection with breaks in only a few months. However, a sturdy replacement cord solves the problem and the issues has occurred with three of my headphones so I must assume it is a design/manufacturing issue. But not a deal breaker as they sound great, sturdy, and really indestructible, apart from the cord issue. I see they are on sale now and going to pick up another pair.

4.0 out of 5 stars

Great headphones in a lot of cases

After much internal debating, I decided to pick these up. The sound quality is very good, though the headphones lack a little oomph in the mid range, given the price point. They do actually have a good bit of bass as advertised. The real place where these headphones shine is the imaging capabilities. In CS:GO I can easily pinpoint where enemies are at based on their footsteps. For competitive FPS and tracks where imaging is very important, these headphones bully a lot of other headphones. The drum fills on Animals As Leaders – Parrhesia and a lot of Fela Kuti tracks are insane on these headphones.That leads me to the price point. These are amazingly good headphones in the imaging category. As for pure music use, I personally tend to go for a more of a relaxed listen for a lot of my library. Don’t get me wrong, there’s a lot of stuff that I have that I can see why these are so great, but for the average listener I would not recommend these purely as music headphones. If you’re strictly listening to music with these, I think a pair of 650s would suit you well, especially if you’re not listening to more energetic music. These still play well with all of my library, but the price point is at lot, at the time of me writing this.Now, if you’re wanting a more forward listen, these are great. Everything sounds so much tighter, response wise with these headphones. You can really hear the intention of the artists with some tracks with these, especially in higher bitrate recordings. These headphones are great for competitive gamers where spatiality is a must, and great for stuff like Jazz Fusion, Metal, Rock, IDM, Electro and some Rap / R&B. I’ve not listened to much vocals with these yet, I’m not too big on vocals in music, so that’s still to be seen.

14 people found this helpful

5.0 out of 5 stars

The best of the Sennheiser 6~~ series.

For my taste, this is a perfect set of headphones. Like the rest of the line, the build quality and fit are excellent. They look great. They have all the bass I want with a Fiio K7 powering them. The bass plays low at good volume. And it is nimble and detailed. The mids are smooth, dynamic, and musical. The treble is clean, well-balanced, and sparkly. The overall sound is extraordinarily clean, clear, detailed, right between warm and energetic, natural, and realistic.The stage has depth and height, though it’s not as wide as some I’ve heard. I was able to make the stage wider by boosting 4800Hz a little bit with EQ. But it wasn’t worth it, in my opinion. The stock tonality is too good to mess with. The imaging is outstanding. Every voice and instrument is well-defined, individuated, and has its own reliable spot in the 3D soundstage. These are great headphones for gaming as well as music.Extreme bassheads may want to boost a low shelf EQ filter centered at 40Hz by maybe 5dB. It doesn’t need much to be what many people would consider too much. I do usually add some bass extension EQ to my headphones, but these are plenty low and loud enough for me without it. The kick drums punch nice and hard, too.I use them with my PC and a desktop amp, but they work fine from my phone, too. The only reason I could see not to buy these is that they are pretty expensive. But I think it will be a long time before I get an itch to buy another set of headphones. These are perfectly satisfying, and provide a beautiful and emotional musical experience.

45 people found this helpful

5.0 out of 5 stars

So comfy, great audio, really love these cans!

I have for years been resistant to open back headphones. I don’t know why, I just have. I finally caved with this purchase as I see more and more folks using them. I didn’t know what I’ve been missing! I have had some great closed back cans – many of the classics, I have a pair of ATH-M50x from AudioTechnica, I have 7506MDRs from Sony, I’ve a pair of Pioneer DJ headphones which I love, but replacing the damaged ear cup turned out to be outrageously expensive. I have a pair of Bose QC2, and BAR far, these headphones are my favorites now. The sound is warm close, and the open back gives it a natural feel that is just lovely. The bass is smooth, and there’s enough clarify in the treble to hear all the detail. Top notch, can’t recommend enough. I used them primarily for music production, as a classically trained audio person, I feel like I have a pretty solid ear, maybe not the best, but pretty good. So I think if you’re looking for headphones that won’t kill you to buy, but have the quality to take your mixing up a level – these are a great buy!

5.0 out of 5 stars

Great for Budding Audiophiles

This is my first pair of open back headphones and I’m hugely impressed. My normal headphones are closed back, $800 B&O Beoplay H95s, which, as far as BT ANC headphones go, are on top of their game. That said, I wish I could carry these Sennheisers with me everywhere I go. I have them hooked up to a Douk Audio P1 preamp with some aftermarket tubes (I’m also new to the preamp game), and this relatively simple set up has really changed the way I listen to music. The level of clarity, instrument differentiation (imaging?) and genre versatility is unlike anything I’ve ever experienced, even with the H95s. I’ve also tried closed backs like the B&W PX8s, Focal Bathys, etc, and still these mid-level open back Sennheisers just plain sound better to me. They’re lightweight, and comfortable for long listening sessions too (a little clampy after a while but I have a big head), and feel sturdy albeit kind of plasticky for the $600 price tag. Nevertheless, If you’re looking to make the leap into true audiophile headphones like I did, you’ll have a lot to learn, but these are a great place to start! A couple of tips for newbs like me: the factory EQ for these means you don’t necessarily need EQ software to enjoy them, like you may with other headphones especially planar, from my understanding (660S2 are dynamic). Second, you’ll really need a preamp like the cheap and effective Douk P1 to make the most out of them. Simply plugging them into your phone with a dongle is like driving a Ferrari and never getting out of 1st gear. Last, get yourself a HiFi, lossless music streaming service like Tidal to make the most of your listening experience, whether with these headphones or in general! Happy listening 🙂

3 people found this helpful