The HD 650 has superbly low harmonic distortion and precision sound reproduction across the...

Sennheiser HD 650 Headphones

Average User Rating:
  • The HD 650 has superbly low harmonic distortion and precision sound reproduction across the entire frequency range. The bass is well ballanced and crisp, with authentic deep bass reproduction. The treble and mid range are well ballanced and ensure superbly realistic voice reproduction. Instrumental music pleasantly natural and yet lower notes clear and vibrant.

Recent User Reviews

  1. Mikualotic
    "An Exceptional Headphone "
    Pros - Scale well source material,great balance of sound, and comfortable
    Cons - plastic (good plastic though)
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    After owning the HD of 650 for two months it is time to do a review. With that time I was able to get the Vallah 2. I was using the Magni 2. The OTL tube amp is a game changer for this headphone. I wish I had a better solid state amp to do a better comparison in sound quality. The OTL amp makes everything sound richer,slightly warmer, and more soundstage with the HD 650.  

    To begin this review of the HD 650, I listen to a variety of music (classical, EDM, theory, rock, and animation to name a few) preforms well in these genres of music. Overall I enjoy the sound of HD 650. Imaging on this headphones are extremely. Soundstage great; it does wonders with live recordings. Bass on these are exceptional for an open dynamic headphone which makes it a worthy upgrade from the HD 598. Mids are awesome on these amazing. Highs on these are solid --not too much harshness on them (2.5k and 7k region).Details on these are amazing . For an example, I can hear the way of a guitar is strummed and hear the room. Thus, I find the tone of the headphone very well balanced for my sensitive ears.       

    Comfort on these are very good. The headband is very comfortable. It has little pressure to no head pressure on them because of the
     headband spectacular design.  Earpads are alright. It also has a light clamp. These headphones are so comfortable that I can listen for hours at a time with these on. 

    My final thoughts of these headphones that they are very solid pair of headphones due to the great sound that they can produce as well as the great comfort. These headphones changed the way I proceed sound. In my opinion, I believe everyone should try these out.  

  2. Dobrescu George
    "Smooth midrange headphone from Sennheiser"
    Pros - Smooth sound, Good bass extension, Natural tone, Good comfort, Very good details, Vivid sound, Almost linear presentation
    Cons - Price, Intimate soundstage, Upper treble lacks some energy, Bass is not for bassheads
    Sennheiser HD650 is one of the (seemingly) consecrated headphones made by Sennheiser as an upgrade (update?) to their well received model, HD600. HD600 has been quite popular from the beginning of its life and has been considered one of the best headphones ever made albeit Sennheiser later made the renowned HD800 (Which have also been later updated to HD800S). To be honest, I find ie800 from sennheiser to be the TOTL IEM with the sound closest to my ideals even without any Equalization albeit it's treble being a bit hot for some sources (DAPs). 
    HD800S is a very good headphone with which I had the pleasure of spending a few hours with, also has a very nice, unique sound to it and it would probably be my TOTL end-game headphone if I could use open back headphones as my whole day headphones. 
    About me
    My name is George and I enjoy music. Quite a lot I might add. I listen to a lot of music while working on my company's games. You can check out more on our pages here     and here . My love for music has had a little impact on our games as we price the music part of a game very high and we are committed to only use ogg -q10 as the encoding format for our music since it offers the best space to sound quality ratio.
    I also have a pretty good hearing and the higher treble means quite a lot to me (8-18kHz area). This perceptual importance that I offer to treble might also come from the music that I listen to having a lot of information in the upper registers. 

    First Impression
    I first listened to HD650 inside AVstore's own show room, using their own amplifiers and the sound was pretty interesting. I wasn't amazed but rather enticed. If there was one thing that impressed me the most - that was the tonality. Absolutely natural. Having tested over 300 different headphones and IEMs to day and having participated in a ton of live music and professional mastering, I know what a natural tone and timbre is. Hd650 has exactly that natural tone and timbre. Considering their price, I thought that they were pretty good. 
    Another first impression that HD650 left me with was their comfort. They didn't look as fine as HD800 and the plastic doesn't have an expensive feeling to it (I was kinda expecting that, knowing HD380Pro, the cheaper but good entry level model from Senn), but HD650 were shockingly comfortable to me. 
    HD650 comes nicely packaged, but there isn't so much in the package - you get your HD650, cable, and adapter. And that's it. The box is nice for depositing HD650, but I wouldn't really take them out of the house or carry them around too much. 
    Technical Specifications
    Impedance300 ohm
    Connector6.3mm w/ 3.5mm adapter included in the box
    Frequency Response10 Hz - 39.500Hz
    Max Sound Pressure (SPL)103dB (1kHz, 1Vrms)
    Ear couplingCircum-Aural
    Cable length3m Straight Cable
    Transducer typeDynamic transducer, open back type
    Power (load rating)200mW
    Weight without cable260g
    Passive noise attenuationZero
    Total Harmonic Distortion (THD)<1% (1kHz, 100dB SPL)
    Contact pressure2.5N approx.

    Build Quality/Aesthetics
    HD650 looks and feels a tiny bit like a vintage jewel, it's not exactly the most sturdy headphone I had in my hands, but not the most flimsy either. They feel well built, but lack some of the higher quality with which HD800 spoiled me while they feel a bit better than Ath-A700x for example. They are light enough to be comfortable, but HD380Pro would be lighter if it weren't for that coiled cable. The cable of HD650 is long and you probably will need to buy an exchange cable to be able to walk with them on your ears. I actually think that you need a change cable anyways since I wasn't such a big fan of the length of the original one. Make no mistake, I personally didn't feel a change  with the new cable, only the feeling and length were different. 
    HD650 reminds a bit of older electrostats and their design, albeit they are a it more stylish. The headband adjusting mechanism works as intended and cable connectors feel pretty solid to me. HD650 is an open back headphone and this means that the driver gets exposed to a bit more than it gets on a closed back headphone. I like the overall build quality of HD650, though the cups move too little for my tastes and the plastic can feel a bit flimsy, especially compared to HD380Pro or with HD800.
    Comfort / Isolation
    Comfort is good on HD650, and you do get the advantage of having a softer clamping force but a very comfortable padding. The top headband padding does a good job at distributing the weight of the headphones on the head, while the pads are large and provide enough depth for your ears to rest well. You won't sweat while wearing HD650 as the pads are velour and you won't get any discomfort after longer periods of time (like an itch that can be caused by some velour types).
    This being said, the pads are comfortable because they don't isolate at all. HD650 is a fully open over the ears headphone that will pump all your music outside at the same rate that it pumps it into your ears. The open back design is something that you should be aware from before buying them as it's not something to solve or to help with, they are open and are going to stay open. 
    HD650 would probably be the most comfortable headphones ever made and you wouldn't know that there is any better before trying HD800 since HD650 not only have a weak clamping force, but the pads are pretty soft and the padding is pretty soft as well and they are light. 
    HD650 has a clear, natural, vivid, dark and soft sound. The tonality is very natural to me, especially the mids tonality is natural while the whole signature is pretty dark (not warm but dark). They are vivid and recover most details and textures well, being one of the best headphones in the midrange area (though there are a few contenders emerging recently).
    The FR as measured by Golden Ears, using their own equipment:
    Channel imbalance
    After a short analysis of the graph from Golden Ears you will notice some channel imbalance in the graph response. I don't hear any channel imbalance but the open back design will also help alleviate this more than it would be in a closed back headphone
    Bass has a solid texture, or at least pretty solid. The signature being dark, the bass will be a bit enhanced, but HD650 is not a basshead headphone and won't become one any day soon. As it happens with many open back headphones, the bass goes pretty low, but doesn't reach as low as a true closed back and bass head headphone. The explanation is that under the frequency of 30Hz, the bass is felt less due to the open back design and the slam / pressure force is weaker in the bass than in closed back designs. Testing HD650 with my test tracks reveals a meaty and nice sounding bass guitar, an HD650 works really well for any kind of music, except for electronica and dubstep where I generally like the bass to be overpowering. Since the bass is solid, this also means that it is pretty fast, you will get even fine textures hidden in the bass and the bass detail is very good, competing with HD800 most of times. The bass does not bleed into the mids nor does it feel too much to me (I would call for even more any day of the week),
    Midrange is really good and sounds natural, no real coloring and no problems to report with it. Background instruments like background violins in Sonata Arctica compositions can sound a bit too much in the back, but they are audible nevertheless. Micro textures in the midrange are easily heard and you will get a lot of details thrown at you at once, resulting in a pretty sweet combination with the bass. This led to that wow effect many are experiencing after first hearing HD650, but I've been using ie800 before and I can only say that ie800 is slightly better, which is quite amazing considering that ie800 is a IEM and hd650 is an open back headphone. There are no dips in the midange for HD650, so you're going to hear the midrange pretty forward and pretty aggressive. It works well as there is no distortion, but makes the bass feel a bit less  (if you were used with closed back headphones), and it gives guitars a magical sweet sound to them.
    Female voices sound good, but Jill Tracy's voice feels a bit close to the listener and a bit too intimate given the rather large soundscape other headphones paint Jill Tracy's compositions as (HD800 for example)
    Treble is where I'm not as happy anymore. While this doesn't really appear in the graphs, the treble feels rolled off and closed, cymbals don't have that sparkle nor engagement to them. The upper midrange is ever so slightly rolled off, and the upper midrange, lower treble is very smooth. I can totally see HD650 being as the ultimate relaxing headphone solution that would include Jazz music and a glass of wine rather than the metal and upbeat electronica that I'm used to. To be honest, I tested HD650 with Jazz and I did alter the sound via EQ up to the point where I liked the sound - so it is possible to get better results, but you should be aware that they're quite smooth and the treble is not bright by any means. 
    Since this is a matter of preference, I won't name it good or bad but try to describe it. The treble is soft - this means that there is no harshness and no grain. Softening the treble can turn it slightly sibilant in many cases, but it stays pretty true in HD650. I was able to enjoy classical music very well, same for cabaret, jazz, and almost all acoustic types of music. When it comes to metal and electronica, the smoothness in the treble will take some of the fun out of the music, and while my opinion might be controversial, I do prefer a Grado or ie800/HD800 kind of treble. I'm glad that I own ie800 and I know that Sennheiser also makes my favorite IEM, so the best explanation to HD650's tuning and sound is that HD650 appeals to an entirely different public. If you're looking for a relaxing sound or the most relaxed sound, but a sound that has good details, brings life to your music and is not veiled, HD650 is an interesting option.
    To not be confusing about the treble, I will end with this bottom line: The treble is really good if you're comparing HD650 with other midrange headphones, but I would had wanted a bit more extension for the treble and a bit more spark. 
    Soundstage is intimate and lacks the width, height and depth of HD800, Ie800 or Ultrasone Dj One Pro. While HD650 are pretty mid centric headphones, they sound focused and intimate, so you might miss some of that 3D surround emotion you get with HD800 or with some better Ultrasone headphones. My personal preference is for soundstage to be large, so I will pick ie800 or hd800, but hd650 works pretty well with music that is supposed to be intimate - like rock ballads or room cabaret or certain classical compositions. From this perspective, it works well with metal. For metal music, having too much soundstage isn't always better, so if you like your metal smooth, HD650 is good to look into.
    Sennheiser Veil 
    Compared to other Sennheiser headphones, HD650 presents almost no veil, and there is no talk of Senneiser typical veil. In fact, HD650 is clearer and more vivid than many other headphones, making it one of the clearer headphones I had the occasion to test and play with. 
    Drive factor
    I've used a lot of amps to test HD650 starting from FiiO E12 to Matrix M-Stage, Chord Hugo, FiiO E12A, WooAudio Wa5-LE, WA22, HDVD800, ifi iDSD, FiiO X5, FiiO X5ii. I easily heard the differences in sound made by different amps, but I personally am not a fan of tube amps and I preferred HD650 driven from X5ii -> Hugo, X5ii -> iDSD, X5ii -> E12, X5ii -> M-stage and from FiiO X5ii the most out of this list. I thought that HDVD800 sounded good as well, but I spent far less time with it and only in a showroom so it's better I refrain from an opinion about the combo. I like brighter sounds with tons of bass - so coloration is good considering my tastes. I'm not shy to apply software equalization to a headphone - so I don't rely entirely on an amp to color the sound for me. I liked FiiO's X5ii as a DAP driving HD650, I liked X5ii + E12 for well priced but really good sounding combo to drive HD650 and I did like X5ii + ifi iDSD for their sound. I would recommend FiiO X5ii as the main transport for any AMP I used - with the mention that FiiO X5-3 is coming along and you will probably want to look into it and get FiiO X5-3 instead.
    Ie800 - Ie800 has considerably more bass, more treble, the tonality is not as neutral but has some color to it, and it's soundstage and instrument separation are better. Ie800 also costs more and is an in-ear model, although it is the best In-Ear model that I tried to date. Ie800 can be fatiguing if you don't like the treble, but I love it's sound and treble. You can check out more here
    Dj One Pro - Dj One pro has more bass, a considerably larger soundstage, but HD650 has a clearer sound, better instrument separation and even though it has less treble, it has more details to it. Dj One Pro costs about 1/5 of HD650 and sounds better than 1/5 of HD650, you can check out more here
    Ath a700x - a700x has a lighter tonality, less bass, and more treble. In terms of detail retrieval, HD650 is better, but the enhanced treble on A700X makes it sound more detailed at times. HD650 sounds more vivid all the time and has a more natural sound
    HD380pro - The sounds are not really similar, even though I expected this to be true. HD380 pro has a different sound to it's bass, albeit it comes in a similar quantity and characteristics. HD380Pro doesn't hold up in the mids as HD650 recovers far more mids and HD650 has more treble, smoother treble and a more natural sounding treble (380pro as some grain to the treble, as you can see here ). Even if there are similarities, the difference in price is felt well although I can't use open back headphones most of times so for me it wasn't a fair comparison. 

    LCD2 / LCD4 - They sound similar. Since my relatively high valency to treble makes me feel differences in the treble faster, I could say that LCD2 and LCD4 were somewhat similar to HD650, with the mention that I didn't listen to either LCD for long enough to have a true opinion about this - so take this part with a grain of salt. 
    HD 650 is a comfortable, smooth, light, intimate, okay built, premium headphone with a really clear sound that enhances midrange and slightly enhances bass while reducing the amount of treble and smoothing it out. I won't own a pair for myself for the same reason I can't own a HD800 - I can't listen to open back headphones. The pair I used was not mine but borrowed from a friend who let me play with it, and those are my honest words about HD650. I like HD800S better, but HD650 was no slouch, especially if you like smooth sounds. I can totally see many people liking HD650 to bits and my wife loved it when we tested a HD650, though she also liked LCD series from Audeze. HD650 has a great audio quality and comfort but it's a frail headphone and I don't see resisting a hit to the ground as well as HD380Pro resisted any beating it took from me. I would buy a HD650 for my own enjoyment if I were able to use open back headphones, and I do recommend you to listen to HD650 as you'll probably find it to be a very interesting headphone that people were right about when hyping about it. 

    HungryPanda likes this.
    "ORGASMIC - soulsiklab reviews"
    Pros - Great sound stage, Comfortable, Great mids, bass and treble in that order
    Cons - Build quality can improve especially the wires.
    Sennheiser HD 650 
    COST: $370
    This headphone is well known by many people. With that being said, it is not a "new" model, its been released for a while. It has also been dropped on massdrop as the sennheiser HD6xx, once again returning our attention to the greatness of this headphone. There is also this big question whether they will drop the HD6xx again or not with over 50,000 people requesting it ! 
    - frequency response of 10 - 39,500 Hz (-10 dB) 
    - High-power neodymium magnets
    - Lightweight aluminum voice coils
    - 300 ohms 
    - SPL: 103db
    - THD: less than 0.05%
    - Open back
    The headphone is not the stylish headphone but remember these are open back and are intended for home use. It comes in one single silver color although the limited massdrop edition (HD6xx) comes in a midnight blue finish
    Build Quality
    Mostly plastic and the wires can feel cheap but everything works well and most of all comfortable 
    Sound Quality
    Now this is where we talk about the most important thing in a headphone. The sound quality in these headphones are superb. Scratch what you've read from other people because we all have difficulties describing this headphone especially when it comes to the sound qualities. It is the best neutral with extended bass YET still not boring... 
    Overall is it worth the money?
    Absolutely, if you can buy one headphone and you are buying something other than this, you are doing it wrong !
    yes I highly recommend you use one with these. some recommendations are some schiit products or O2/ODAC 
    NOW keep in mind these are "some" and there are countless more others recommend depending on preferences
    I personally use the DARKVOICE 336SE tube amp with my OPPO HA 2 SE as the dac
    there are various mods online that can be done easily to improve bass etc, shoot me a message if you have any questions or difficulties
    Want me to compare x headphone to these? feel free to message me for extra help ! OR better yet try my pair before you buy them ! HOPE THIS HELPED 
    review provided by (more detailed review available on the website)
    video for reference only
    GlaSid likes this.

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