Reply to Help with Porter Robinson Bass?

Having trouble achieving something similar to the style of bass that Porter Robinson uses in his Seek Bromance remix. It can be heard extremely isolated in the outro of the track starting at about 6:20.

http://soundcloud.com/porter-robinson/tim-berg-seek-bromance-porter-robinson-remix

The specific parts that are troubling me are the grit/crunch and almost unclean sound of it. At the same time it has a huge punch and presence to it as well. Any help recreating something like this would be greatly appreciated.