Dear young folks, rediscovering the power of personal MP3 players like iPod Classic. Know that retro gives you more. My personal favourite headphones for an iPod or similar device: AKG K92 (closed back) and, of course, the Koss Porta Pro (open back). Both still being made, both in the €50 sweet spot of really good sound at an affordable price. And as both are passive headphones, they last forever. No battery problems, no codec shit. Just sound. Good sound :) You're welcome.
@jwildeboer if you use the Koss in public, you will get some angry looks, the sound leaks out - and you have to turn them up because sound leaks in
@arne_d_h If you run your Koss at volume levels that causes angry looks, you are first and foremost destroying your own ears :) I never got angry looks in my 20+ years of using them.