Real owners lean toward the Beyerdynamic DT 900 Pro X: 71% of 234 owners recommend it, vs 58% of 93 for the Sennheiser HD 620S.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
The open-back Beyerdynamic and the closed-back Sennheiser split on isolation before they split on sound, so anyone sharing a room should start there. The DT 900 Pro X clamps hard enough that owners talk about breaking it in, and its headband draws complaints for peeling and cracking, though the ear pads themselves are called comfortable. HD 620S owners point to comfort and passive isolation as high points, with soft, deep ear cups, but some struggle to get a consistent seal, and a protruding headband anchor can press into the ear cup area. On sound, the DT 900 Pro X is described as detailed and fairly neutral with pinpoint imaging that suits gaming, and it runs fine without an amp; the HD 620S is praised for a wide, spacious soundstage unusual for a closed-back and for responding well to EQ, going from good to noticeably better once tuned. Both take the same criticism for bright or harsh treble and for bass that runs thin, so neither serves a listener chasing low end. Buyers who want an easy-to-drive all-rounder for music and gaming should look at the DT 900 Pro X; buyers who need isolation and long-session comfort from a closed-back, and who are happy to tune with EQ, should look at the HD 620S.
“I bought the 900 proX as my first high end headphone for mostly gaming and music. They caused me to spend another 2k on speakers and a schiit stack because id never heard such beatiful sounds. Worth it”— @Lperry on YouTube
“900 sounds more natural, intimate and less fatiguing but it doesn't stage the same way.”— Bret Halford on Head-Fi
“That joint is a huge weak point in my opinion.”— @drewmorg. on YouTube
“Just got my 620s yesterday, I like it, which is saying a lot for a closed back. I think it’s easily one of the best closed back headphones not only in the price range, just in general.”— MoonWun_ on Reddit
“Crazy enough, the HD800s and the HD620s share the top spot in my endgame headphones. And the price difference is over €1,000. I just can’t believe what the HD620s deliver for €279.”— No-Desk-1808 on Reddit
“I think technically the 620s but the design of the ear cups means they have this bit that protrudes into the ear cups (I think the anchor for the headband) and it’s quite uncomfortable (at least for me).”— gussic on Reddit
The open-back Beyerdynamic and the closed-back Sennheiser split on isolation before they split on sound, so anyone sharing a room should start there. The DT 900 Pro X clamps hard enough that owners talk about breaking it in, and its headband draws complaints for peeling and cracking, though the ear pads themselves are called comfortable. HD 620S owners point to comfort and passive isolation as high points, with soft, deep ear cups, but some struggle to get a consistent seal, and a protruding headband anchor can press into the ear cup area. On sound, the DT 900 Pro X is described as detailed and fairly neutral with pinpoint imaging that suits gaming, and it runs fine without an amp; the HD 620S is praised for a wide, spacious soundstage unusual for a closed-back and for responding well to EQ, going from good to noticeably better once tuned. Both take the same criticism for bright or harsh treble and for bass that runs thin, so neither serves a listener chasing low end. Buyers who want an easy-to-drive all-rounder for music and gaming should look at the DT 900 Pro X; buyers who need isolation and long-session comfort from a closed-back, and who are happy to tune with EQ, should look at the HD 620S.
Owners point the Beyerdynamic DT 900 Pro X at competitive gamers needing precise footstep imaging, and home producers mixing on a budget.
Owners point the Sennheiser HD 620S at gamers wanting a closed-back with wide soundstage for competitive FPS, and office/WFH users needing strong passive isolation from surrounding noise.
The most-cited downside of the Beyerdynamic DT 900 Pro X is strong clamp needs breaking in. For the Sennheiser HD 620S, it's treble can be harsh, bright, or metallic-sounding, especially in the upper registers and vocals.