Excerpt: These headphones sound absolutely incredible! They deliver as promised by Sennheiser and as commented upon by other reviewers. I was looking as a slightly lesser model to upgrade from my old Sennheiser HD-424's (yes, from the 70's and still going strong after several earpad replacements!). When I found the 650's with a mail-in rebate, I "raised the bar" on my purchase and, man-oh-man, am I glad I did.
Pros: Comfortable, Durable, Good Bass, Great Sound, Nice Storage Box, Stylish
Excerpt: I use the HD650 headphones with a newly purchased desktop headphone amplifier connected to my computer by a small DAC. Before purchasing the HD650, I was listening with the HD598 headphones. I thought they were a capable set of headphones, but when connected to the new amp I began to think I had purchased a lemon. The HD650s changed that perception right out of the box.
Excerpt: Never had anything like these. Have had Sony's and currently Bose but even with my age related hearing loss, I can hear how good these cans are compared to what I've been using. Now I can hear the quality in the High Def FLAC and DSD music I've been buying online!
Summary: I had long wanted to purchase a pair of Sennheisers and eventually got the 598 and 600 but returned both of them. They just didn't excite me. The 650s, however, are terrific, even without an amp. I have no doubt they'll be even better with a headphone amp. I haven't listened for over an hour at a time, so I can't speak to long-term comfort, but generally speaking they are comfortable and well-made. They come with a 1/4 adaptorwhich is helpful.
Excerpt: The moment I put these on, I was instantly impressed and relieved: This was a great online purchase, sight unseen (unheard). They happily exceeded my expectations. I was not planning to take headphones in this price range to work, but now I'm not sure how I can exist without them. I prefer open-back, circumaural headphones for audiophile reasons and for the ability to hear what's going on around me in the workplace.
Excerpt: First off these sound great compared to the HD 555's they replaced. Honestly, the 555's are great for devices that don't put out much power. But when you give the 650's some power they really excel. However, I'm quite surprised by the average materials on the 650's. In my opinion my 555's have better ear cups and head foam than the 650's. At least on the 555's the 'HD 555' is printed straight onto the plastic.
Summary: The desire to maintain domestic tranquility motivated me to start listening to music through headphones more often. My 30+ year old AKG K240s have served me well but I thought it might be time to audition something new. Did a lot of research but was not able to find any nearby dealers to try them out so I was a bit concerned about ordering before hearing. However, I have not been disappointed.
Pros: Quality product, great sound. I found the 650s to be comfortable over several hours of listening.
Cons: Now I think I'm going to have to upgrade my CD player...and then a new integrated amp to take full advantage of the 650s.