I own two pair of these, both the original 600-ohm model from the mid 70s. I still use them quite frequently, they are my favorite headphone.   One pair has a tighter headband with less flex - probably my "2nd pair" that did not get used as much. This squeezes my head a bit - and I have a smallish head as heads go. So if you are buying a used pair, be sure to check this aspect for your comfort. Replacement parts are harder to come by now.   There are still a variety of cord replacements available with the right earpiece jacks, the newer shorter...

I was interested to try these for the price, but alas the lack of a good ear seal makes them almost unusable.   I ordered some other 3rd party tips, and still can't get a good seal. Bass response just dies without a good seal. When I press on the earpieces to make them seal, the sound is tantalizingly good.   I'm frustrated - need to try and find some tips that can work with these to get any good out of them.   The over-ear design is not really my cup of tea, but I could live with that if the sealing was improved.   Other products I like for...