Ok firstly I started with a synth.
I did this very quickly, so bear with me for the roughness.
I used Synapse Hydra. A great Bass Synth.
And I used the Solid Dub Bass Preset. Which is basically a sinewave bass sound.

to Begin with, the appreggio.






I then turned the resonance up to about halfway, and brought the lowpass filter down until the sound became like this (I also added a little low end EQ boost)

http://www.iterativemusic.com/db/RumbleSolo.mp3



Then I sidechained to a simple kick I made with a kick generator and compresson, to give you an idea of what can be done with the sound.

http://www.iterativemusic.com/db/RumblenKik.mp3

And finally, wacked in a few other simple elements to show how the sound works in an ensemble

http://www.iterativemusic.com/db/RumbleFull.mp3

You can have lots of fun around this principle.
Try carying the pitch of the appreggio every 4 notes.
Or long 3 note chords played with this sound in interesting timings can give great effects for really interesting bass lines

Experiment.