HD 1 In-Ear Wireless combines sleek design, immaculate sound performance and take-anywhere mobility. This premium neckband headset made of luxurious, high-quality materials, offers exceptional hi-fi wireless sound assured by Bluetooth 4.1 and...

Sennheiser HD 1 In-Ear

Average User Rating:
  • HD 1 In-Ear Wireless combines sleek design, immaculate sound performance and take-anywhere mobility. This premium neckband headset made of luxurious, high-quality materials, offers exceptional hi-fi wireless sound assured by Bluetooth 4.1 and Qualcomm® apt-X™. With NFC for simple one touch pairing, an integrated microphone, and a ten-hour battery life, it is the perfect companion to mobile devices.


    - Wearing Style: Ear Canal
    - Transducer Principle: Dynamic
    - Frequency Response: 15 – 22,000 Hz
    - Connectivity: Bluetooth 4.1, Qualcomm® apt-X™ and NFC
    - Charging Time: Approx. 1.5 hrs
    - Sound Pressure Level (SPL): 112 dB
    - Battery Specification: Rechargeable Lithium-ion Polymer (170mAh)
    - Battery time: Up to 10 Hours


    - HD 1 In-Ear Wireless Headset
    - USB Charging Cable
    - Ear Adaptor Set (XS, S, M, L)
    - Carrying Case
    - Safety & Quick Guides

Recent User Reviews

  1. shuto77
    "Sennheiser's HD-1 IEBT: Very Good Audio On-the-Go"
    Pros - Very good sound quality for a Bluetooth IEM
    Extremely Comfortable
    Warm and forgiving sound signature
    Very good stereo imaging
    Treble is inoffensive and never fatiguing
    Cons - Bass can get a bit boomy with demanding material
    Slightly warm coloration to the mids
    First, I'd like to thank Sennheiser USA for asking me to do a review on their new HD-1 in-ear Wireless headphone (HD1). This review contains my honest feedback, and I have received no financial compensation for doing this review. I may, however, keep the review sample - and I'm quite pleased about that. Read on to find out why.

    At face value, I'm not the target market for this IEM. First, I often have fit issues with IEMs. Secondly, I've become accustomed to carrying around a pack of cables with me whenever I go to work, and of carrying around a portable DAC. I figure this is just the cross that the audiophile has to bear. This may be changing, however, if the quality of the HD1 is any indication.

    My reference point for excellent portable audio is my Chord Mojo and a Periodic Beryllium IEM, a combination that really ticks a lot of boxes for me. I'm not mentioning this to say the HD1s should sound as good as $900 worth of gear; rather, it's worth mentioning to show I have a frame of reference. If the HD1 is your first mid-fi IEM, I imagine you will definitely enjoy these.

    The Mojo/BE combination provides me with many things: Portability, a warm and detailed presentation, which I'm fond of, and the combination performs admirable with any test material I throw at them. This combination, however good it may sound, is not the most convenient when I'm out and about, or at the office. The HD1, as a wireless Bluetooth IEM, allows me the the very best in portability, with very few trade-offs. I expect the HD1s will stay in my rotation because of how incredibly convenient they are.

    Build Quality & Fit
    As has been said before by many others, it does not matter how good your headphones sound if they are uncomfortable to wear. Indeed, I've returned or sold dozens of headphones for ergonomic issues alone. Thankfully, Sennheiser - who's been in this business for decades - knows how to get the fit right. The HD1 uses a genuine leather headband that is very soft with just the right amount of padding, and the whole package is very lightweight. Even more importantly, the housings are small and lightweight, and are of a commonly-found diameter, so you're sure to find a tip that fits you, if none of the four that come in the package fit you perfectly. I do believe, however, that a $200 IEM should have more than four sets of eartips, but I had success with the largest ones, which are pretty big. Of course, your mileage may vary, however.

    The HD1s also come with a high-quality zip-up hardcase that is less than 2 inches thick - very easy to slip into a backpack or briefcase. I've been using these every day for two weeks now, and the case is rugged, attractive, and serves its intended purpose.

    The HD1s are very attractive and well-made, taking many visual cues from Sennheiser's well-regarded Momentum series. In fact, these remind me very much of my original Momentum Over-Ears which I had a few years back and enjoyed a great deal.

    The battery life on the HD1 is very good, and its listed life of 10 hours sounds just right to me. A Bluetooth headphone can be held back by a weak battery, but the HD1 has no such problem.

    Sound Quality

    I did all my testing via my LG V10 smartphone and Samsung 10.1 tablet. I was able to connect to either device quickly and easily, and never had any difficulty engaging pairing mode, or having the HD1s not show up as a pairable device.

    For my music listening, I used Tidal on the HiFi setting to access my offline content, Tidal via USB Audio Player Pro and Spotify's Extreme setting when I was on my workplace's slow guest WiFi connection.

    I listened to dozens of carefully curated test tracks through Tidal, and many tracks that I am very familiar with to gauge - in my admittedly subjective manner - how close to neutral the headphones sounded, vs what I know these songs should sound like.

    I also watched an episode of Netflix's excellent Daredevil to see how the HD1s stood up as a general purpose media consumption headphone.

    What about the bass?
    The bass on the HD1s is full, impactful, and reasonably articulate. I would not call these serious basshead cans, nor would I call them bass-light. They are bassier than neutral, but not offensively so. This warm and smooth quality is usually a good combination, and only runs into problems on occasion.

    The bass shows good impact and decent speed, and never overpowers the rest of the mix, even on bass-heavy dance and hip-hop tracks. For a Bluetooth IEM, I'd say bass performance is very good. Listening to "Mombasa" from Hans Zimmer's Inception soundtrack, the HD1s thumped with authority - no mean feat. Many reviewers use this track to review full-sized home subwoofers to see how well they can keep it together with a deep, hard-hitting track. The HD1s did a very nice job with this very difficult track.

    I do have one criticism of the bass, however. It does have some difficulty with some extremely dense passages. I found this to be problematic when listening to progressive instrumental metal (which I listen to probably half the time). When listening to complex tracks from Meshuggah, Animals as Leaders or Polyphia, the HD1's bass couldn't quite keep up, and showed an unfortunate muddy and one-notey tendency. The bass was much more agreeable on less complicated passages. Much popular music isn't so demanding for playback devices, so you may never run into this unless you're looking for it.

    To be fair, I'm not sure if this criticism is perfectly fair to level at a $200 IEM, but I wouldn't want readers to expect these to have a world-class bass response.

    Still, the bass shows few of these problems, except when pushed to the limits in dealing with dense passages. For 80% of my listening, I thought the bass was very good.

    The mids on the HD1 are clear and transparent, and quite good overall. They are smooth and thick, but they lean on the warm side. I listened to several songs from Incubus and Thrice - two of my favorite bands that I'm very familiar with - and the vocals on each had a warmer presentation than I usually hear. If you're not in the habit of closely listening, you may not notice this. In fact, this didn't bother me at first, but as I continued listening to my favorite singers, I thought the mids were a bit off. I understand this warm presentation is very popular with many people, and may actually be a benefit to some.

    This warmness in the mid-range isn't all bad, however. I though it was good for TV watching, however. Dialogue was crisp and clear when watching Daredevil, so there are certainly benefits to this sort of tuning.

    The treble response on these is good, but not great. If you are sensitive to sibilance, these are a great choice for you. In listening to stringed instruments, especially guitars, the HD1s never showed a hint of sibilance and were never strident.

    Edit: After further listening, the treble is my favorite part of the HD1's sound signature. Some tracks' treble may sound slightly muted, but that is seemingly how the song was mixed. After listening to more songs with pianos guitars and violins, the treble response was very good and well detailed, while never verging on sibilant or "zingy."

    Stereo imaging on the HD1 was very good. In one Meshuggah song, they recorded the sounds of insects buzzing around. You could hear them move from left to right, then right to left. It felt as if this swarm of who-knows-what was flying around my ears! This sort of imaging typically comes from more expensive IEMs

    Instrument Separation:
    Overall, instrument and note separation was very good. In Spanish Harlem, sung by Rebecca Pidgeon, you can hear each individual not played on an upright bass guitar and the piano. This song shows off Pidgeon's dynamic, yet controlled voice, and Pidgeon wonderfully complements the band playing with her. This song is found on Chesky Record's most recent audiophile demonstration disk, so it's a great test. The HD1s handled this song very well. I listened to Spanish Harlem several times, and was impressed with how well the HD1s handled it.

    Subjective Take:
    I know I've been a bit critical the sound signature, but taken as a whole, it just works very well. Everything I've listened to has sounded pleasant to very good, while never spectacular. Even when listening to complex metal, the HD1s never sounded bad, and usually sound very good.

    What's so good about these?

    I think the real draw of the HD1 is that they're an excellent IEM to use at the office when extra wires will slow you down, or when you're kicking back to enjoy a TV show or movie on your laptop or tablet. When you think about the HD1 IEMs in this way, and remember that they're only $200, and wireless, the value proposition is strong.

    Unfortunately, I don't have any IEMs that are direct competitors to the HD1s. My Periodic Audio Berylliums cost $300 and are wired, so it's not exactly a fair comparison. The "BEs" punch above their weight class, and they are tuned with audiophile sensibilities in mind, so they're not the best comparison.

    I also recently had the iBasso IT03s. With a $260 MSRP, these are closer in price to the HD1s, but are also superior in sound quality, but are much weaker in comfort. Even though the IT03s sound better, the HD1s are much more comfortable. You just plug them into your ears, and enjoy, and that's really what this hobby is all about - enjoying the music.

    Final Thoughts
    While these IEMs are not "perfect" by audiophile standards, they are very good wireless IEMs that provide very good sound on the go. If you're looking for a wireless Bluetooth IEM, definitely give the HD1s a listen. I think you will be pleasantly surprised!

    Individual Rankings:

    Accessories: 8
    Design: 9
    Fit/Comfort: 9
    Sound Quality: 7
    Sennheiser and Hansotek like this.
  2. BloodyPenguin
    "A Truly HiFi Wireless Earphone!"
    Pros - Clean Crisp Sound, Nice Controlled Sub-Bass, Easy to Connect, Controls Work Very Well
    Cons - No Foam Eartips Included, Neckband Can Get Sticky/Warm
    I give you, the Sennheiser HD 1 In-Ear:



    I was quite shocked when I was asked to review the Sennheiser HD 1. I was not expecting it and I was very honored to be noticed. I quickly jumped at the opportunity. I was provided a sample of the HD 1 for the purpose of the review from Sennheiser. Also, all photos in this review were taken by me, no stock photos were used.

    [Product Link]: https://en-us.sennheiser.com/hd-1-wireless-earbuds-headphones
    [Current Price]: $199.95


    - Wearing Style: Ear Canal
    - Transducer Principle: Dynamic
    - Frequency Response: 15 – 22,000 Hz
    - Connectivity: Bluetooth 4.1, Qualcomm® apt-X™ and NFC
    - Charging Time: Approx. 1.5 hrs
    - Sound Pressure Level (SPL): 112 dB
    - Battery Specification: Rechargeable Lithium-ion Polymer (170mAh)
    - Battery time: Up to 10 Hours


    The unboxing experience is relatively straight forward. Sennheiser has been doing this for a while. So you do get quality packaging and presentation as you get to the product inside. Once opened, the HD 1 In-Ear was nicely displayed inside of its portable case.




    - HD 1 In-Ear Wireless Headset
    - USB Charging Cable
    - Ear Adaptor Set (XS, S, M, L)
    - Carrying Case
    - Safety & Quick Guides


    The Carrying Case is a very nice place to store your HD 1, I like how it looks, feels and functions.

    The USB cable is simple enough, though I do like that they made it longer than shorter.

    While the HD 1 comes with everything you need to make them work, I just wish there was also at least one pair foam eartips. Foam tips can provide even more isolation, which can be important for a set with no noise cancelling.


    Lets just be upfront, Sennheiser did a FANTASTIC job with both the design and build. The HD 1 In-Ear is put together with precision and quality materials. This is a NICE Bluetooth earphone. I love the integrated red stitching that lines the neckband, I like the matching red cable that goes to the drivers and I especially adore the earphones themselves which are a work of art with their smooth curves and subtle etching.




    For me personally, I could not use the Silicon tips, I had to use a set of MandarinEs Foam Ear Tips instead. (Picture shown below):


    The housings themselves are quite light and provide a snug fit, that is smooth on the ear canal. So in return, the earphones are very comfortable. Even when wearing this for long periods of time, I never noticed ANY discomfort. I could wear them all day if needed. That is because a majority of that weight is put in the neck band, controls, batteries and such.


    If I have to nitpick, it is that the neckband can get a little warm and sticky, more so if you are out in the sun or hotter weather. This can all be easily solved by wearing a collared shirt, which my wife prefers on me anyways.

    *Bluetooth Use/Features*

    While you have the basically standard controls and microphone, the HD 1 just does it so effortlessly. When is use, it is easy to feel the four nicely placed buttons on the neckband. I like that I can control the volume, song selection/playback and phone calls with such ease. The reason this is a big deal, is that a few of the Bluetooth earphones/headphones I've tried, have not had this level of functionality and ergonomics.


    Sennheiser also added all of these little touches. Like that little vibration of when the HD 1 turns on/off, so you know you are pushing the correct button and it has power. Also, once they boot up, they give you a verbal estimate of the remaining battery life in hours. It is just so classy, I could get used to this!


    The battery life claims of "Up to 10 Hours" is no joke. I swear these HD 1 could play forever. I have not tested the exact playback time, but I can tell you they just keep going, like the Energizer Bunny.


    For testing purposes, I used the LG V20 (Not Shown) and FiiO X5 3rd Gen (I sold the FiiO DAP shortly after starting this review). Both these devices use apt-X™, that allows the wireless connection to reach HiFi levels.


    Lows - Sub-bass, sweet sub-bass, my favorite. The first thing I noticed was the deep, controlled lows. The HD 1 is tuned masterfully in the lower frequencies. The discipline of which the bass is used is masterful. The lows are kept in check at all times and NEVER leak out of their designated range. A GREAT test for the bass is pumping out "Trust (TRST) - Candy Walls, love that distant rumble.

    Mids - Stepping up the the mids, the HD 1 continues to impress. I would go as far to say that the mids help put together and overall neutral sound signature. With vocals pitched accurately and oh so enjoyable. The clarity in this mid section is impressive.

    Highs - The cherry on the top is the highs. They are as detailed as you can get without any harshness, even with treble happy tracks. The stable highs in return give the headset a longevity to listing time that is impressive for any earphone.

    Soundstage - Depth of sound is impressive for not only a Bluetooth earphone, but any type of earphone. Distance is wide, while still being fast and accurate. I would not change a thing here.

    Isolation - With the smaller smooth housings, getting a snug fit is a breeze. Once installed, the HD 1 blocks almost all sound, there is no need for any noise cancellation with this Bluetooth earphone.

    *Overall Thoughts*

    The HD 1 is not only a great Bluetooth Earphone, it is a GREAT Earphone in general! The sound quality is amazing, I honestly could not tell the difference from this wireless earphone and some of my best wired setups. Build is top rated with a great blend of function and form.

    The HD 1 surprised me, I was not only caught off guard by the request to review this Bluetooth Earphone from Sennheiser, I was blown away by every aspect of its use.

    While these are slightly pricey, I think they still are a wonderful bargain. You are getting EVERY cent of your Dollar/Pound/Euro/Etc... with the HD 1. It gets one of my highest recommendations.

    Thank you to Sennheiser for both this chance to review your product and the enjoyment I continue to get out of the HD 1 In-Ear.

    episiarch, Evshrug, Demo3 and 4 others like this.

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