Sounds like a layered bass which gives it so much size, but still remains deep. I've tried layering some LPF sounds on top of the bass that plays the same midi notes (pad sounds, bass sounds etc.), used compression for a sucking effect and played around with several filter settings. None of these approaches got me even close to the sound in the clip above.
Hope you can help me in the right direction (or at least enjoyed the track
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)