Real owners rate these about evenly: 55% of 663 Audio-Technica ATH-M50x 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
“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
Real owners rate these about evenly: 55% of 663 Audio-Technica ATH-M50x owners recommend it, vs 58% of 93 for the Sennheiser HD 620S.
Owners point the Audio-Technica ATH-M50x at producers and DJs wanting durable closed-back monitors, and budget buyers wanting a build that lasts many years.
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 Audio-Technica ATH-M50x is bloated bass that muddies the mids. For the Sennheiser HD 620S, it's treble can be harsh, bright, or metallic-sounding, especially in the upper registers and vocals.