Summary: I have had S HD 515 more than 2 months and more I listen, more happy I am. Before I bought it, I had Bose around ear headphones which delivered sound with too much bass, not so crisp high tones and not very good stage. I paid for Bose 110 euro while I bought HD 515 for 90 euros. Before I bought 515 I read very different feedbacks from users.
Summary: these are definatly,classical only phones...whilst they have a good level of detail for string based classical,this doesnt extend to other types of music (or "bassy" classical) sounds anemic in comparison to other phones,with an over emphasized treble,and a very tinny midrange and zero bass (much like an old shortwave radio with a crystal headset from the 80s :D )on the plus side tho these are very comfortable and can be worn for long periods of time.
Summary: I bought these cans after listening to it in a store. Immediately I was convinced. It has good bass,mids and highs. It`s not the perfect headphone, but it has nothing bad either. I love just the way it is.
Summary: I was able to borrow these cans for some time. Here's my quick thoughts on them: These cans deliever quite an enhanced, fake sound. At first listen, they seem to have a fairly balanced presentation, until I plugged in a pair of eH350's, and all I could say was "I was missing so much mids and detail." These cans offer little bass extension, boomy upper-bass/lower-mids, a cheap, plastic-sounding mid-range, and acceptable highs.
Excerpt: I recently purchased an MP3 player and while it came with decent earbuds I decided to replace them. After much consideration I chose the Sennheiser Hi-Fi Stereo Headphones (HD515). These headphones are some of the more comfortable things I have had on my head.
Summary: I find these headphones to be very comfortable. They have good depth, so I use them for the 'live performance'
feel. I also find them adequate on the airplane. The long cord is great even though at first I was annoyed when I used it on my Ipod. I listen to shortwave and they have a nice communication audio range. My cat doesn't go after the hefty cord, so that's a plus +.
Summary: Bought these about eight months ago to replace my wireless sennheiser phones that didn't work.
These sounded good, but not that good. Not for the price. Strong bass, clear sound, comfortable fit, and excellent sudo-surround. I just think Sennheiser could do better for the price. The bass isn't as clear as it could be, or quite as strong, and they won't get as loud as I would like. Although, they probably get loud enough for most reasonable people.
Summary: First off, if you are looking for noise-canceling headphones, you are looking in the wrong place. These are open-back headphones -- meaning they will let all sound in and out... they are NOT built to be noise-canceling. And if you are looking for iPod or other MP3 player headphones, again, wrong place.
But if you're looking for headphones to use for home listening that have amazing sound quality and are super-comfortable, you're in the right spot! These are great.