How to make this bass sound?

[Cat Gas]

I'm also still trying to figure out how to get one note and bend it, or even just different notes rolling them into each other.
But that's not the main point here:

How do I make this deep, rich, bass?
Everything I try always sound too digital

[video]http://www.youtube.com/watch#playnext=1&playnext_from=TL&videos=nRC27us1udE&v=3ju_NoxO1PQ[/video]

 

[logikz]

make a big old distorted reece and lowpass it. detuned lowpassed saws > sine