Get yourself a generally well regarded set of headphones, then look into AUTOEQ.app, and you’ll have a great time. You don’t have to go ridiculous to get amazing audio.

just tried it. Not sure if it sounds better or I’m listening more closely than before. either way, I’m listening.

I just got it set up with wavelet using my Sony wh-1000xm3 headphones. It’s interesting. I think it’s better. The autoeq preset definitely makes it a lot cleaner sounding with a bit more definition in the highs. Turning the eq off makes it sound fuller, but also muddier.