What's the Most Important Headphone in the History of Headphone Enthusiasm?
I'm wondering, what's the most important headphone ever made for headphone enthusiasts?
Not necessarily the best sounding, or highest price, or most popular, but the headphone that was most influential in spurring on the hobby of headphone enthusiasm. In your mind, the most important audiophile headphone.
Here's the choices I came up with; if you feel I missed one you think more important, feel free to write in your choice in the comments.