18% of 93 verified Sennheiser HD 620Sowners don't recommend it — based on real owner comments from Reddit, enthusiast forums, and YouTube.
For balance: 58% recommend it. This page collects the complaints so you know what you're signing up for — read the full owner report for both sides. How we score
“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
“I Had 620s as well, and sold it. Upper treble is too metallic for my taste, and I couldnt get a good seal and good low end extension in low-mid volume.”— Silent-Engineering61 on Reddit
“I also found the bass to be anemic, and the highs a bit strange. Felt pretty claustrophobic without any of the deep sub bass rumble”— Akella333 on Reddit
“I had to return the HD620. I just find them to be too bright with the music I want to listen to. I’m quite disappointed by it.”— VIAN16 on Reddit
“I didn't really love the sound so I returned it, but at least in terms of comfort it was decent to me.”— solarized_dark on Reddit
“I ultimately let the 620S go because they actually sounded lesser to me than other headphones.”— yellowmnm on Reddit
“I had it and I found it to sound very odd and it cost way too much for what it offered.”— Framed-Photo on Reddit
“I have the 620s and they are awful for movies there's no low end like you're thinking.”— Zereks on Reddit
“Sennheiser are just so ass at making closed backs, 3rd consecutive failure in a row”— DonnyTramp123 on Reddit
“The HD620 sucks for me because of the fit and the sound isn't that great either.”— 0cchan on Reddit
“The 620S has weaker bass and sounds a little dry compared to the 480 Pro.”— Azronath on Reddit
“this headphone just sucks at creating a seal. It didn't seal for me.”— throwaway117- on Reddit
Not complaints — practical notes from owners that didn't affect the score.
“I bought a case for my pair and also use the pouch it comes with. They are never left out. Wipe the pads with the pouch or grab a small microfiber cloth and keep it in the case.”— SamuraiCinema on Reddit
“620S definitely had a bit more passive isolation than the 480 pros. But the difference wasn't big enough that I would bother hinging a decision purely on the passive isolation”— Takile3 on Reddit
“Maybe HD 660S2, probably the HD 620S. Before you start spending money, try out equalization. It's a bit of magic that has removed a lot of headache in the audio world ;)”— sennheiserconsumer on Reddit
“Well my current headset is the HyperX Cloud Alpha S and Sony XM6 for wireless use. I want something balanced with good bass for watching and playing games.”— DctrGizmo on Reddit
“I know what you mean. But you already have the 660S. maybe the 550 would just be a sidegrade. How do you like the 620S? How would you describe them?”— PutSilly9235 on Reddit
“NOTE: I'm trying to embrace the neutral signature but I heard HD 620s, Focal Bathys and some others, and the only thing I liked among them was the one with good bass - Denon D7200 (which was WAY out of my budget).”— GGlolerGG on Reddit
“Both are fairly neutral. Soundstage on the 620S is actually wider than the 6XX, I was surprised too, but the 6XX has always been known for its intimate presentation despite being open-back. The 620S feels more spacious.”— antonbarada on Reddit
“Thank you. I didn't think the way you described it. This is my first "audiophile" headphone, so maybe I need to give it a try. The only problem is I have only 14 days to return it.”— PsycoRico on Reddit