I listen to my e30s with the Clip+ RB eq turned off. Sounds pretty fine to me, with metal, hard rock, punk, blues, country, folk, etc., just a little warmer than neutral, i.e., with slight additional emphasis in the upper bass / lower mids. My test is comparing live concert recordings to what I recall actually hearing live. I don't see any reason to equalize these at all to pass that test. But that's just me.
PS Make sure you have tips on your e30s that provide a good seal. Its pretty easy for these to loosen because of their short nozzles and without a good seal your bass will really suffer.