Customer Ratings & Reviews

Extremely good sound and much better lows than the S1. Great improvement

Using these headphones with a Topping DX3 Pro+ and a slightly tuned EQ I saw in a YouTube review. They sound very good and very open. Zero distortion in my usage. Very nice overall

The SENNHEISER HD 660 S2 is exactly what was missing from the previous iteration by including low-end bass, adding a much needed punch to an already well performing set of headphones. It delivers exceptionally on all fronts, including music, gaming, movies, and even conference calls. The one thing I heavily appreciate from the 660 S2 is how the headphones are open back, which while it adds to an incredible sound delivery, they can also act as a makeshift stereo system, allowing others to also listen in to whatever it is your're listening to. If you can grab these on sale, they are easily one of the best headphones for everyday usage.

Warmer than the 660S and getting more use these days than my HD800s. While the soundstage isn’t as wide as their flagship, these are just fun and require no EQ’ing. Everything from rock to classical to electronic, they shine and I was surprised at how well they produce bass given the openback design. Light weight and comfy for all day wear.

The Sennheiser HD 660S headphones have excellent audio quality, comfort, and open-back design. They are my favored for their detailed sound reproduction. If you appreciate high-fidelity audio and an immersive listening experience, the HD 660S could be a solid choice.

It's my first pair of higher end headphones, so my opinion of them might be a little skewed. But I found them to be very comfortable and have really good audio quality. I find I can wear them for a few hours at a time an not really feel a difference afterwards because they're open back.

These headphones are an AMAZING start for anyone looking for some top-notch quality headphones. The price tag is definitely an investment, but it will be worth your while. With a wide soundstage and great acoustics, it makes it seem your music is coming in front of you. These headphones are very satisfying for the high treble consumer, not the bass heavy. Keep in mind you will need a dedicated headphone amp and DAC-not a general mic mixer-to utilize the full potential of the headphones since it does have 300 ohms as the max. I recommend the JDS labs combo, which comes out to $230 as a great start, since most amps can be much more.

I have always wanted to get my hands on the Sennheiser 660s1 and still do, but when I finally came to the conclusion that I was ready to own a pair, the 660s2 had released and with zero hesitation I snagged myself a pair. If you're going to get this high quality studio headset for yourself I would strongly suggest getting yourself and amp/dac if you don't already have one. Even if its simply just the wave XLR which is classified as an amp card and is able to supply 250 ohms. It is still a great option, from my own personal experience. I would also suggest that you download the FXsounds application from the Microsoft store as it will alow you to better equalize the soundstage to your own preference. Don't get me wrong though, even straight out of the box this headset sounded beautiful. I would happily recommend this headset to anyone who is looking for a high quality one. If you're just reading this to see how people feel about this headset but dont want to spend 600$ I would highly suggest checking out the Sennheiser 560s which is 220$ and is also an amazing headset which was my previous drivers till I bought the 660s2.

I needed a new headset for gaming. I have used razer headsets in the past, but many many people suggested I look into Sennheiser. I've never been an audiophile, but I figured why not. After extensive reviews and comparisons, I decided to purchase these. They're much different than closed back headphones, but the sound quality is worth it. They're comfortable and perfect for gaming, music, and streaming shows.

My 1st entry into the Sennheiser line up. For the 1st week they were pretty uncomfortable but after the break in they feel so good on my head now and the sound quality is jaw dropping! It’s bizarre how sound varies between other headphones. The 660s2 made me feel like if I’m literally sitting in front of the person performing. I love these and would recommend the Sennheiser brand to others!

This product is honestly amazing. Since I live with roommates, I can’t always use my studio monitors for audio engineering. But with these headphones, I’ve been able to mix and master entire tracks without any issues. The sound quality is incredibly immersive, and even gaming with them feels like a whole new experience. Definitely worth every penny & some.

Amazing headphones. Sound quality is out of this world with a low end dam ( pair with an audio engine d1 dac) Only minor thing is the clamp force for big heads like me, which can be fixed by watching a tutorial for 6xx series clamp force

Best headset I've ever had. Keep in mind this is not noise canceling so at higher volumes your audio can be heard by those around you. Great bass, crisp treble, gold connectors and true over the ear fit.

excellent sound quality, and design. also light weight.

I have experienced a number of great sounding headphones. This Sennheiser-HD 660S2 wired over the ear headphone is exceptional in its quality to low mid high range of sound and tone. My listening is a very rich experience through these headphones.

Really like these headphones but they need an amp and they’re pretty tight when you first get them. Highly recommended them.

I make music and play video games and listen to music everyday and these headphones are incredible. I was using the JBL Quantum One Gaming Headphones and i upgraded to these and i couldn’t be happier. They’re super comfortable and they sound so good, i miss them when i leave the house lol

Very high quality with upgraded bass. Connected to an amplifier with a DAC.

Awesome, the best. Highly recommend A++, these are the top of the line

The best headphones ever. Don’t trust me…. But ur reading reviews? Try them out you won’t be disappointed and honestly will fall in love at first sight with these headphones. If not just return them but I bet u won’t :)