Wide Sounding Flutter Bass

Hey !
I was wondering how they did those Bass sounds here:
http://www.youtube.com/watch?v=fpWsMpCbnJo

(The bass from 0:10 for example)

I dont know the real term (if there is) for those kind of bass sounds and I wonder how to make them.
the roomfilling part is unison with a detune and much spread I think. But I need an idea for the oscs.

Thanks !

Yeah thx ! The Ring Modulation adds some power, too. Im close to this sound now! thank you