I am not going to take credit for this one, because I read it in an interview with Tchad Blake.
In Pro Tools duplicate your kick drum track, insert the San Amp plug-in and adjust until you get a thick round low end with some distortion. Now include your clean source track and REVERSE THE PHASE on your Sans Amp track. Continue adjusting Sans Amp Plug-in (especially buzz and low knobs and take down highs) until you hear it sound like it is an octave below. I was skeptical, but works great for a thick kick.
What a great buy this console is. Great support and sounds absolutely wonderful and pure. I like a little character, so I combine the Audient with some Neve and API mic pre's with some of my fav compressors, like a Urei 1176LN or SSL FX 384. That's just enough salt & pepper to make my kind of record.
For 5.1 Surround Sound I use the Audient ASP510 controller