I own these.
When I first used it was stream g via Google. So almost neutral eq setting, but as I was listening to EDM, the bass was ok/good.
THEN, I reinstalled my old music app (power amp ... A paid for app. You can dl a taster app and try before you buy)
Once I started using the eq settings in poweramp, the bass didn't so much come alive, as ripped my ears out! lol I found I couldn't use the preset extreme bass eq, as it was just too much for my ears AND the headphones (the bass was just too extreme for a clear sound).
Whatever audio set to be you have set on your source device, that's what's repeated through your headphones (+-).