It starts with tracking - not sure what you're using as far as interface or line in but ideally you'd want a Bass->DI Box->decent preamp->LIGHT compression->computer.
In mix, you apply a bit more compression. Running a high pass filter on either bass or the kick drum would probably help as well but each is going to sound a little different than the other, so try them out.
Generally speaking EQ is something you want to go light on - if you have to go heavy you're probably not getting the sound you want out of the bass in tracking. Pay careful attention to your tone. Good luck!
Thanks for the advice! Much appreciated.