All categories/Over-Ear Headphones/Sennheiser/Sennheiser HD 660S2
Sennheiser HD 660S2

Sennheiser HD 660S2

Based on 8 comments across 4 communities
What 8 owners say
254 comments reviewed · scored on the 8 clearest verdicts
38%
Recommend
3 owners
24%
Neutral
2 owners
38%
Don't recommend
3 owners
Source
Breakdown
Score
N
Counted in the score
Other forumsAudio Science Review, Head-Fi
29%
7
Independent blogsino affiliate links
100%
1
Reviewed, but not counted — and why
YouTubei
87%
23

The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, and blogs with no affiliate links. YouTube and affiliate blogs are shown for perspective but kept out — hover the i for why.

What owners love
  • Precise, fast, detailed bass with real punch7 owners · 88%
  • A genuine upgrade over the HD 600/6XX6 owners · 75%
  • Great all-around sound that grows on you5 owners · 63%
  • Well-built and comfortable for long listening3 owners · 38%
Common issues
  • Overpriced at full retail for what you get3 owners · 38%
  • Open-back leaks audio and blocks no noise3 owners · 38%
  • Underwhelming or disappointing tuning to some3 owners · 38%

Top quotes, sourced

254 reviewed · 31 shown
Sentiment
Community
Sort
YouTube— neutral

I am happy about the sound profil and the quality. The retail price is kind of ridiculous though

YouTube▲ recommend

They are my go-to primary headphones.

Head-Fi▼ don’t recommend

I wouldn't say the 660S2 is an upgrade. It's really on a similar technical level to the 600, but the tuning is quite different. I didn't like it as much as the 6XX and 600.

YouTube— neutral

I bought the 660s2 open box for only £269, and just a bit better over my moded 6xx , but quite close .

YouTube▲ recommend

It's not just louder bass. It's more nimble, more detailed. Play a song with a fast, complex bass line, and you'll hear each note individually on the S2, while the 6XX blurs them with or without EQ.

Head-Fi▼ don’t recommend

I had the hd660s2 i was very disappointed with them... boring tone. Everything sounds the same, IMO.

Audio Science Review▼ don’t recommend

I just listened to it today and was severely disappointed, especially taking its price into consideration. Its bass sounds bloomy and although the treble isn't very fleshed out, mids still manage to sound recessed somehow

YouTube▲ recommend

I absolutely love the HD660S2, definitely an upgrade to the HD600

Audio Science Review— neutral

It does, however, create a fatigue free and pleasant listen to me. After a while I was totally comfortable with the sound. Won't beat my HD800 (EQ'ed) though and is not as well extended in the bass and does not have the clarity of the S5X

Audio Science Review— neutral

I wouldn't say the S2 is disappointing but you wont be immediately impressed as it's very neutral however it grows with longer listening sessions and at least myself do not get fatigue from them. I am a musician and I would say they sound a lot like music

YouTube▲ recommend

the S2 is my favorite of the 600 series. By a wide margin. I enjoy the added kick in the pants out of the bass performance as well as the extended upper frequencies.

YouTube▲ recommend

Just received my 660S2'S today wow what a difference from the 6XX

YouTube— neutral

660s2 is bright and aggressive but distinguishing frequency separation could be better

YouTube▲ recommend

In a way it reminds me a lot of my beloved 650 but better ,enough so that I am finally selling 650 and bying 660s2.

YouTube▲ recommend

660 S2 are great headphones!

YouTube▲ recommend

Tested a heap of headphones under $1000. To my ears these were clearly the best. (Including the 650 etc.,)

YouTube▲ recommend

just got the 660s2 for $400 and I paired it with mojo2 sounds amazing

YouTube▲ recommend

These at the more recent 400 dollar price point are excellent, I use 600s as my studio headphones and the 660s2 has replaced my 6xx as my home listening headphones.

YouTube▲ recommend

I found the 660S2 to have more punch, making the orchestra more power. The bass had more ooomph to it, and yet sounded very natural.

YouTube▲ recommend

I really recomend it they blow up my mind when I listent to with my cheap tube amp.

YouTube▲ recommend

To me the 660s2 seems more detailed and extended, as well as being clearer.

YouTube▲ recommend

The best thing in my opinion ist the very very precise and clear bass of the 660 S2.

YouTube▲ recommend

my first sennheiser headphones and I have to say they are here to stay.

YouTube▲ recommend

I have both and like them a lot. HD660 S2 are easy to power than HD650 and less amp picky.