Not every speaker can be equalized. There needs to be a few things in order to do it.
#1 Even off axis response.
#2 no dips and peaks from major resonances, cones or box.
#3 low enough distortion so when the bass is EQed up it does not fall apart.
I will not buy anything these days without seeing the measurements. But that is a starting point. I default to listening when possible
Measurements don’t show you how detailed the speakers is and there are still important measurements no one seems to do.