The Sennheiser HD 620S is making waves among audiophiles and casual listeners, quickly earning its place as a top contender in the crowded closed-back headphone market. Users frequently express their astonishment at the expansive soundstage, which many feel rivals that of open-back headphones. This creates an immersive listening experience that makes music feel alive and spacious. The overall sound signature is consistently described as balanced, clean, and detailed, with a particular emphasis on clear mids and crisp, non-fatiguing highs. One user enthusiastically stated, “Sennheiser knocked it out of the park with these… these cans keep that wide soundstage and fantastic imaging of open-back, with the added benefit of extra bass and aforementioned noise isolation.”
However, the feedback isn’t universally glowing, and a few recurring criticisms emerge from user reviews. The most common complaint revolves around the bass response. While many find the bass to be tight, accurate, and well-controlled, a notable portion of users, especially those accustomed to more bass-heavy headphones, find it lacking in deep sub-bass punch. Another point of contention is the clamping force. While some find the fit secure and comfortable, others, particularly those with larger heads, report that the headphones are uncomfortably tight, leading to pressure and fatigue during long listening sessions. A handful of reviews also mention build quality concerns, such as creaking plastic or issues with the cable connection over time, though these appear to be less common. Despite these issues, the overwhelming sentiment is that the HD 620S delivers a premium audio experience that justifies its price point.
Key User Feedback Summary
| Most Loved Features | Most Common Complaints |
|---|---|
| Exceptional Soundstage | Lack of Sub-Bass |
| Users are consistently impressed with the wide and immersive soundstage, often comparing it favorably to open-back headphones. This is considered a major achievement for a closed-back design. | A recurring theme is that while the bass is clean and punchy, it lacks the deep, rumbling sub-bass that some users desire, particularly for genres like EDM and hip-hop. |
| Balanced & Detailed Audio | Tight Clamping Force |
| The headphones are praised for their neutral and clear sound signature. Mids are described as realistic and forward, while highs are crisp without being harsh or sibilant. | Several users, especially those with larger heads, find the clamping force to be too tight, causing discomfort and headaches during extended use. |
| Comfort for Long Sessions | Build Quality Concerns |
| Despite the tight clamp for some, many users find the deep ear cups and well-padded headband to be very comfortable, allowing for hours of listening without fatigue. The replaceable ear pads are also a plus for longevity. | A minority of users have reported issues with the build quality, including creaking plastic parts and problems with the detachable cable’s durability and connection. |
| Excellent Noise Isolation | Requires an Amplifier |
| The closed-back design provides significant passive noise isolation, effectively blocking out ambient sounds without the need for active noise cancellation. | Some users note that the headphones, with their 150-ohm impedance, require a dedicated headphone amplifier to reach their full potential, and may sound underwhelming when powered directly from a phone or laptop. |
Frequently Asked Questions
- Are these headphones comfortable for people with large heads or glasses?
This is a mixed bag. Many users find the deep ear cups and ample padding very comfortable, even for long sessions. However, a significant number of reviewers with larger heads have reported that the clamping force is too tight, causing pressure and discomfort. It seems to loosen up over time for some, but for others, it remains an issue. Wearing glasses can add to the pressure for some individuals. - How is the bass on the HD 620S?
The bass is generally described as tight, accurate, and punchy, but not overpowering. It excels in delivering detail and clarity in the low end. However, if you are a “bass-head” or primarily listen to genres that rely on deep, rumbling sub-bass, you might find these headphones lacking in that department compared to other closed-back models. - Do I need a headphone amplifier to use these?
With an impedance of 150 ohms, it is highly recommended to use a dedicated DAC/amp to get the best performance out of the HD 620S. While you can run them from a phone or computer’s headphone jack, users report that they sound significantly better—clearer, more dynamic, and with better bass response—when properly powered. - Are these good for gaming?
Absolutely. Gamers frequently praise the HD 620S for its wide soundstage and precise imaging, which makes it easier to pinpoint enemy footsteps and other directional cues in competitive titles. The excellent passive noise isolation also enhances immersion by blocking out distractions. - How do they compare to other popular Sennheiser models like the HD 600 or HD 650?
Users note that the HD 620S does not sound exactly like the open-back HD 600 or HD 650. While it shares the family’s characteristic clear mids, it’s a distinct product. It’s described as having more bass and a different soundstage than its open-back siblings, representing a successful translation of the 600-series sound into a closed-back format, rather than a direct closed-back copy.
Should You Buy It?
| This is for you if… | You might want to look elsewhere if… |
|---|---|
| ✅ You prioritize a wide, speaker-like soundstage in a closed-back design. | ❌ You are a “bass-head” and need powerful, deep sub-bass. |
| ✅ You listen to a wide variety of genres and appreciate a balanced, neutral, and detailed sound signature. | ❌ You have a particularly large head and are sensitive to strong clamping force. |
| ✅ You need good passive noise isolation for listening in moderately noisy environments. | ❌ You plan to use them primarily with a smartphone or laptop without a dedicated amplifier. |
| ✅ You are a gamer looking for headphones with precise imaging and an immersive experience. | ❌ You are on a tight budget and are not prepared to potentially invest in a headphone amp. |
