The best way to get the tones you want is to understand your equipment and how to use it. Understanding how to EQ will help enormously as well. Start reading, there are tons of threads on here explaining EQ, some have graphs like the link below. There are characteristics associated with certain frequencies, for example, boomy bass is around 200hz, clanky is around 5khz, etc. Knowing this will help you achieve the tones you want, improve your sound and solve problems at venues playing live.
It might get a little boring, heavy going, confusing but its need-to-know stuff for bass. Making the most of a 31 band EQ
You should get to know what gear the bassists you like use. And then get to know the gear as they will have specific characteristics as well, for example the sansamp has a scoop at about 750hz and a certain sound distortion, so when you listen to people you will begin to recognize what they are using. Therefore how to achieve the tones. Cutting and boosting frequencies slightly can change tone quite a lot, it might be the long way to learn but its the best. Even having the same gear will not necessarily mean you'll have the same tone.
Sorry long post.