Is it the DAC or the wired headphones that make the difference?

Bought a Hifiman Edition XS a while ago, driving it from a 90s Harman Kardon, as it needs quite some power. You can get good and powerful mobile DACs as well, coworker did that, but it's more expensive than the headphones.

So much fun to rediscover my old LPs and even crappy 128kB mp3s sound much better.