Over-Ear Headphones · owner-verdict comparison
HiFiMan HE400se vs Sennheiser HD 660S2: what real owners say
Real owners lean toward the HiFiMan HE400se: 80% of 127 owners recommend it, vs 61% of 231 for the Sennheiser HD 660S2.
Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score
80%of 127 owners recommend
80% recommend · 9% neutral · 11% don't
Owners praise
- Outstanding sound for the price / bargain planar
- Wonderful, fast planar bass
- Responds beautifully to EQ
Owners complain about
- Uncomfortable headband with a pressure hotspot
- Hard to drive / needs a proper amp
- Treble peaks / harshness that need EQ
61%of 231 owners recommend
61% recommend · 20% neutral · 19% don't
Owners praise
- Lush, natural mids and vocals with classic Sennheiser timbre
- Deeper, richer bass with much better sub-bass extension than the older 6x0
- Excellent imaging and soundstage for gaming and movies
Owners complain about
- Dark, veiled or muffled-sounding presentation
- Loses the forward midrange magic of the cheaper 600/650
What HiFiMan HE400se owners say
“The treble is still tamed, but the bass doesn't seem to roll off. Punchy and fun.”— @onepieceatatime on
YouTube
“they are amazing, the replacement grills smooth out all the peaks and dips”
“Hifiman are known to last about two months. It's only a question of time before they fail and customer service is bad from what I saw.”— @westsenkovec on
YouTube
What Sennheiser HD 660S2 owners say
“I've had it for 5 years now and I still consider it the best of the 600 series”— @o.f.ftrack3444 on
YouTube
“They are my go-to primary headphones.”— @scottlowell493 on
YouTube
“At $250-$350 I would consider giving these a go at $600 they are a pass.”