These are not meant for that application (or any other) where a sound leak is unacceptable

FYI, this headphone IS open, so I can't listen to them when I'm studying in the library (because the sound leak will bother others around me)This means that I have to go back to PXC 450 when I'm listening in public, which, btw is still fantastic

Being an open back headphone the entire sound leaks out and in my case, wife hates it

It's difficult to make 650 sibilant (harsh S), but possible - tolerable even when it does.

sound great too, either plugged into the receiver or piped thru my logitec PC system (their top o line with separate headphone amp)

if the high price of these should scare u off,I can also recommend the HD 558's,as I was never dissatisfied with the sound of my old headphones.

Thank U ;)

The headphones were nice enough to put the Braille letter L on the left side but the cable has no such thing.

If you like a laid-back, really mellow phone with no personality, you might like these

I am etiher getting accustomed to the sound or they are improving as I use them more

In excellent condition as well--almost as if they were never opened :D Thank you!

So I looked at Sennheiser other phones as well as

and I absolutely love them months after purchasing just as much as I did the first day.

The HD650's may not have the fancy technologies of orthodynamic or electrostatic units, nor the pricey parts and accessories, but they definitely sound nearly as good and even better in some ways

I have found they sound marvelous with vintage Marantz receivers that can be obtained inexpensively, as well as from modern dedicated headphone amps

The 10K also has a little bass boost that seems to help the low-end