I can't remember if I may have already suggested this to you before: if you go to the settings icon (on the EQ screen) and change the Q setting to Narrow (1.4142), you can then fine tune your cut/boost.When I EQ a little extra bass on my es100, they’re more engaging, but it’s hard to get just right.
I have a iFi Hip DAC ordered that should be here at the end of the month.
As an example, for my Dunu DK-3001 Pro, I'm experimenting with an isolated boost to the very low end