It won't be bass specific but if you are really interested in learning about that stuff I would recommend looking for frequency based "ear training" sites online. (As opposed to music theory based ear training sites, though those are helpful too!) A lot of the options out there will probably be geared towards audio engineers, but frequencies are frequencies regardless so they should be very helpful!Thanks guys! (And thanks to everyone else who replied, again: thank you.) I am going to try to jump head first into this. I also want to learn. In this thread and many others, I keep reading about "hz, khz, mids," and all that. Where or how is the best place online to learn about this stuff and how it applies to tones? I want to get good enough to where when I hear a particular tone, I can estimate in my head what hz it's at and whether the "mids are scooped" or the EQ is "happy faced" and all that you guys talk about. From being a noob, this is super interesting stuff that you are all familiar with.
Thanks again!
Also definitely agree with @Phe recommendation to just record yourself a bit and play around with an eq and listen to the results as you cut and boost different frequencies and combinations of eq points. And as for a "one-box" hardware solution, besides the ones already mentioned, you could also look at any of the bass specific digital multi-fx. They will of course do more than just that one sound, but they should also be able to have all the eq and saturation options to get you in the ballpark of the sound you are after.