This tutorial covers two different types of sub basses and how to layer them.
Let me know what you think!
Filter: If you want to bring in more mids to "hear" the pitch better, use a Lowpass filter and crank the Drive.
Distortion: Again, if you want to bring in more mids, add some distortion
Filter: Lowpass, 24 dB. Bring the Cutoff way down, and then adjust it to your liking, depending on how much you want to be able to "hear" the pitch. Use Res to lighten it a bit and reduce some of the heaviest bottom end. And use Drive to make it warm and saturated.