Sennheiser HD 620S Closed-Back Over-Ear Audiophile Headphones – Natural Spatial Imaging, Low Distortion, Comfortable All-Day Design, Detachable Cable – Ideal for Focused Listening, Gaming, and Desk

I had high expectations for the HD620S and it exceeded all of them. I own the HD6XX and they're incredible open back headphones, but I personally need closed back headphones most of the time. The HD620S is the answer! This headphone has a neural response like all HD6-series headphones, but it has a little more low end and high end because it's a closed back. So more bass, more treble... But it's not bass heavy, and it's not overly bright. It's balanced. It's just right. Music sounds "the way it should" -- but with more detail than what you would hear in the HD650 or HD6XX. However, it's not the kind of detail some headphones add, where the treble is boosted to an absurd degree. Rather, it's just there. It's present. The bass is the same. It gives you what you need without overshadowing the low mids. This 6-series headphone uses a 5-series case, because Sennheiser found that the 5-series casing works better for closed back headphones... But it sounds like a 6-series. No worries about the case, though -- it's very comfortable. I look like Alfred E. Neumann and yet my ears don't touch the drivers at all! One thing I noticed about this headphone was the sense of space. Usually closed-back headphones sound "in your head", which is fine... But open back headphones have that 'wide sound stage'. The HD620S is a little closer to open backs in that regard, but without the room noise. As far as blocking external sound -- the HD620S is about average in that regard, which is fine. The cord comes out of only the left side (unlike the HD6XX which comes out of both sides.) This is a welcome upgrade. The cord is durable enough, but lightweight so there's no sense of imbalance. It is slightly "microphonic" though, which is the wrong word but it's what headphone people use. I'm talking about physical transfer of noise. If the headphone cable is tapping or moving, and nothing is playing in the headphones -- you can hear it a little. Moreso than most professional quality/audiophile headphones... But not nearly as bad as the HD280Pro. It's not a problem at all, but just something to be aware of. I don't notice it at all during regular use, and I move my head a lot. This isn't a headphone you would want to use outdoors. The drivers have a very thin netting over them, which keeps out large debris but you wouldn't want to use these in a dusty area. Think of these as home & studio headphones. Speaking of studio -- these are phenomenal for music production. They sound like studio monitors, basically, in the best possible way... Meaning they won't make a poorly mixed song sound good -- but a properly mixed song sounds detailed and amazing... With no noticeable peaks or valleys to make mixing confusing. I would recommend these headphones for anyone who wants a reasonably affordable high end audio experience, or for audio engineers who need closed back headphones but want open back sound and quality. In short, between the HD6XX and HD620S -- these are the only headphones I need, and I've purchased (too) many before this. I love these headphones, and the HD620S in particular is my favorite.

Jan Michael · 2024-06-25 · via amazon

Simply amazing. I have been a headphone guy for years. I almost always exclusively use open back headphones. I have had some closed back headphones in the past that cost multiple times as much as these do and there has always been a sense of claustrophobia in the music making it unrealistically difficult to get a grasp on the spacial qualities of the songs. Out of the box these changed my perception on closed back headphones and the more I use them the better they get. Also, there's nothing wring with that claustrophobic right-next-to-your-head sound, its what I get and expect from Bluetooth wireless headphones, even the nicer ones. The way those create spacial qualities in music is usually with DSP, digital signal processing. That makes the fun happen for sure but its not realistic. The wireless headphones spend much more time on tech in the digital realm than good old sound quality. What the Sennheiser HD620s do, to my ears, is a revelation in the closed back headphone market. Are there others that sound better, I'm sure there are, the HIFI world is vast and insane. What these do is give me everything I want in a closed back headphone at a price anyone can either afford or save up to. I mean that across the board, it's everything I want. Clarity is nice, mids are Sennheiser's specialty so they are realistic and nice, bass is there when needed but not too deep. The highs are not to pingy and insane and the bass is not so deep that it distracts from the music. The Sennheiser HD600, as many people know, is possibly the best all around headphone on the market. This is why they have bene unchanged for decades and continue to sell super well. Again, there are many that are better but at the price point the HD600 does everything so well that it is often one of the price point benchmarks that other headphone manufacturers try to beat. Nothing sounds bad on it. It's my go to swiss army knife ol reliable and it scales incredibly well sounding better and better the more the listener invests in their chain. I reach to it often and I have many headphones that are MUCH more expensive. Tons of people feel the same. The Sennheiser HD620s does not sound like the HD600 so don't expect that. What the HD620s represents to me is the same idea as the HD600, the headphone that will sound great all the time no matter what it connect it to, just this time as a closed back. It's wonderful. It is easier to drive than the HD600, I would assume you could use it from the iphone dongle or the headphone out on a laptop, I have not tried this, but I would HIGHLY recommend using an external dac, amp, or dac/amp. The HD620s, much like the HD600, scales very well and sound better and better higher quality the chain is.

Patrick Walker · 2025-02-04 · via amazon

Pros- Stellar sound quality with EQ, Perceived soundstage is vast, Super Comfortable while also being lightweight and very isolating for a non noise canceling headphone, solid build quality, replaceable pads and cable, ability to add a mic not included, quarter inch adapter included and decently priced at $299 sale price. Cons- stock sound quality is wonky but easily corrected with eq. Look up reviewer based Resolves eq adjustments and use an auto eq app to apply them. Regular price is too high I feel. The top headband should be user replaceable but it looks like it’s just glued on. Final Thoughts- While this isn’t a perfect headphone. The isolation and almost great sound quality out of the box except for certain songs is great. But my experience with this headphone with eq makes the wonkyness of the sound for certain songs disappear and just sound fantastic for the price. The isolation for this headphone if you can get a good seal is seriously impressive, I used this headphone at an event to monitor the audio and I could make out the audio coming from the headphones perfectly with the PA system at volume levels that were uncomfortable for me. If you know this is compromised headphone and can either deal with the experience or modify it so it’s perfect for your taste I see this as a good value product if you get it at the right price.

007 · 2025-12-03 · via amazon

These headphones are very high quality and at such a low price. They are closed back, but have a sound stage comparable to an open back. Outside noise is just about inaudible. Organ music sounds like it is in the cathedral where it was recorded. Frequency response is flat across the headphones wide range. I can't recommend these highly enough!

Paul Emmerich · 2026-04-27 · via amazon

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