The HD-650's are incredible headphones. They are entirely musical, and that is the very best compliment I can give them. I can wear them for hours, and they are physically comfortable, as well as easy on the ears musically. They are very detailed, but not in an obvious, contrived way.

Unbelievable clarity; very transparent; flat frequency response; very musical and detailed

Almost too transparent to source, AC power, and wiring; Absolutely requires a good headphone amp

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.

Quality product, great sound; I found the 650s to be comfortable over several hours of listening

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

The Sennheiser HD 650s are a set of high-end, open-backed, over-ear headphones. The HD 650s implement their open-backed design in an aesthetically interesting way, covering the backs of the ear cups with a grey grate which offers barely any physical barrier between your sound and the world around...

Source: Lite-On DVD Combo Drive Audio CD's Headroom Ultra Desktop Amp with Max DAC USB from computer into mini USB on Amp / DAC Music: Cake ( Motorcade of Generosity ) Great vocals and right to left motion within the sound field Cake ( Pressure Chief ) Especially \"Wheels\" Awesome bass lines,...

The set produces good bass, but lacks the features of other models.

Comprehensive sound and soft ear cushions make these headphones easy to wear all day

The lack of features is frustrating; and the open-ear design hinders noise isolation

I was a Day One iPhone adopter, and can easily say that I'd buy one again, even though the first generation iPhone is clearly not perfect. My main complaint with the iPhone is the battery life. Compared to other cellphones, the iPhone's battery life can best be described as "barely adequate.

I had the HD 555's previously and I wanted an upgrade. Had been very happy with Sennheiser so I decided to stick with them. These were a very noticeable upgrade of my previous set and they were totally worth it.

The HD 650 has been Sennheiser's flagship audiophile headphone for several years now, but it is only recently that the firm decided to buck contemporary pricing trends to reduce the product's list price from around $600 to $500.

T he HD 650 from Sennheiser is a class apart when it comes to looks as well as performance. It's not everyday that you see a pair of headphone so delicately wrapped with foam in a big silver box.

- Comfortable; - Excellent sound

- none

If you're like me, an updated version of a beloved audio product brings with it a number of questions. (It's even worse when a favorite musical group releases a new album.) Will it be as good as I hope? Will it maintain the "house" sound of the product I liked enough to purchase?