Customer reviews from Sennheiser
Sennheiser - Refurbished Excellent - HD 660S2 Wired Over-the-Ear Headphones - Black
Average customer rating
4.7 out of 5
4.7
(19 Reviews)
Open Ratings Snapshot
Rating breakdown 19 reviews
5 Stars
15
4 Stars
3
3 Stars
0
2 Stars
1
1 Star
0
78%of customers recommend this product. 
(
7 out of 9
)
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Customer Reviews for Sennheiser - Refurbished Excellent - HD 660S2 Wired Over-the-Ear Headphones - Black
Customer Rating
4 out of 5
4
My HD 660S2 experience
on February 26, 2023
Posted by: Adam
from Waterloo, Illinois, United States
So far, I love these headphones. I listen to music, obviously and they sound incredible. It almost feels like it engulfs me and transports me to a happier place. I also game a lot, and they still sound incredible, the low thuds of artillery fire and the high pitches poorly oiled machinery moving through fields, it sounds like I'm really there at least. (Though maybe not the greatest place to be pulled into) With all my praise I am currently giving these headphones, you may wonder why I felt like I had to give it 9 stars. They are tight, they like to squeeze my head and makes it hard to have on for extended periods. I will admit they are looser than the HD650's out of the box, still tight. However I am the type that struggles to find a hat that fits in stores, so tight headphones are to be expected. All in all, I highly recommend these headphones.
Written by a customer while visiting Sennheiser
Customer Rating
5 out of 5
5
Extra low end makes it sound more balance
on February 26, 2023
Posted by: Gerardo
from Huntsville, Alabama, United States
I have the 660S1 and they are great but always felt they lacked a bit on the low end. Now the S2 the low end is present, clear and not moody. By adding more low end bass they make the highs sound a bit warmer in comparison to the S1 but not in a bad way. Overall they sound balance from highs to low frequencies
Written by a customer while visiting Sennheiser
Customer Rating
5 out of 5
5
Perfect Daily Driver
on February 26, 2023
Posted by: Adrian
from Gaithersburg, Maryland, United States
My set is only a week old and still breaking in, but with around 50 hours of listening, I'm finding the HD 660 S2 to be an easy favorite in my headphone collection. There has been a lot of kerfuffle about these being less neutral than the venerable HD 600, which to my ears is true, and I like the differences. This is an opinionated set! They have a slightly narrow soundstage but with more "vertical" separation than you'd expect if that makes sense, which create a slightly intimate setting (much moreso than e.g. AKG K701) with noticeable frequency band separation. This actually pulls some presence out of a lot of the electronic music I listen to (mostly ambient like Hollan Holmes and 36), but is *incredibly* flattering to acoustic material. Old Paul Simon tracks sound like a meticulously recorded Hillary Hahn recital out of nowhere. By being freed from studio monitor duties, this set of headphones has turned my music library into buried treasure, and it's been a lot of fun going through it.
Also, the reviews that list comfort as the first thing you notice aren't kidding. I apparently have an enormous head that nothing fits or feels good on, and these things feel almost therapeutic over 4-5 hours of listening. They aren't that heavy, the build quality is great, the fabrics are excellent (also yay fabric), and the result is a nicely convincing amount of pressure over a widely distributed area through nice materials and they just feel excellent. Paired with the open-back design, they are an extremely relaxing piece of kit.
I'd recommend these to anyone, with the hopefully expected reminder that they are the real thing and as such absolutely do need a real break-in period of proper audio exercise both for the drivers and for the headband and pads.
Written by a customer while visiting Sennheiser
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