SENNHEISER HD 660 S - HiRes Audiophile Open Back Headphone

Great Mids and Highs, lacks sub bass. Needs amplification to sound its best.

The size of the cans is just normal, in photos they appear huge because the headband is small in design. These feel tight at first but become comfortable after use. No poly film that will break off with use. Comes with normal and balanced cable! Can use it with some cell phones but headphones amp will work better. Works great on an audio interface headphone jack. My ik multimedia axe i/o 120 ohm headphones output works great. Decent bass definition and detail. Mids are good and highs are defined but not pronounced/prominent. Overall generally flat frequency response i think, still detailed sound. But i feel these are still not super close to the closed back hd380. Good detachable cable, hard box, adapter cable, and balanced cable. I would purchase these again.

I write and arrange music. These are amazing studio headphones - light and completely balanced throughout the audio frequency spectrum. Their response time for fast attack sounds is amazing - thanks to the open design.

Sound quality was amazing, just hurt my head to wear.

This is another Senheisser keeper, very comfortable to wear, the audio quality is very good with crystal clear mid/high range and good but not ear-piercing lows although not as loud as the Beats audio. Maybe after a few more days of use and it will be broken in and have better bass feel. Build quality is excellent, and I hope this will last me over a decade like my other Senheisser headphones.

Just what I was looking for for a few years! Tried Bowers and Wilkins, Sony and was not satisfied.

Im currently listening to as many things as possible trying to sort out my listening experience with this. What I can say is that musically speaking, it feels like every instrument has its own lane. No matter how saturated the track is with different sounds everyone one of them is showcased. Listen to all of your favorite music again. You WILL hear new things. Vocals are ridiculous. They sound so full bodied, like the voice is being heard in its entirety. Nothing punches through, but everything is absolutely accounted for and given time to shine. Very good for rap , which is a unexpected but fascinating none the less.

The 150ohm impendence makes the 660S much easier to drive then 600/650, it has a typical Sennheiser rich and warm sound signature. Im using the balanced output of Fiio M11 to drive my 660S and it sounds amazing. The sound stage is smaller than 600/650, thus you can feel the intimacy between the singer, especially female vocals. The base is rich and warm, but in decent amount, and does not overpower the treble.

If you are looking for noise cancellation then this is not the headphone youll want to buy However if sound is your preference then this is the right product

This was a Christmas present to myself and I wanted to be able to listen to music through something other than my AirPods or my sound bar. I listen to music with my headphones on my MacBook Air, with Spotify or Youtube. I have listened to Led Zeppelin, some jazz, and classical, and everything sounds very clean. I could hear Bonzos squeaky kick drum pedal very clearly. (Led Zeppelin fans will know what that means.) Though I didnt buy the headphones to listen to movies or TV on my MacBook the sound is great as well. I watched Almost Famous recently, and the movie and the music sounded great. The headphones are so comfortable. The movie was 2 hours long, and the head phones were never uncomfortable. I am very please with my the headphones.