Over-Ear Headphones · owner-verdict comparison

HiFiMan Sundara vs Sennheiser HD 660S2: what real owners say

Real owners lean toward the Sennheiser HD 660S2: 61% of 231 owners recommend it, vs 53% of 352 for the HiFiMan Sundara.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

HiFiMan Sundara

53%of 352 owners recommend
53% recommend · 30% neutral · 17% don't
Full owner report →

Sennheiser HD 660S2

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
Full owner report →

What HiFiMan Sundara owners say

“They won't break. I've got a opair of the 2020 Sundara's and a recently purchased set of Arya Stealth. They're both perfect. Sound wise and build quality too.”
— Kevbassman on Reddit
“Absolutely the Sundara gives you way more than its price suggests clean planar bass, great detail and a neutral tuning that honestly captures most of what people love about higher end cans.”
— Ornery-Ad-9419 on Reddit
“I think the. Sundara is super overrated. It's fine, nothing special, has some quirks/problems that many better headphones in and above its class don't.”
— drwafflefingers on Reddit

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.”
— @mindhead1 on YouTube