[quote name='nottswarwick' timestamp='1381356574' post='2238157']
So, what's that bass, and what's making that massive tone.
[/quote]
It's a custom Alembic, running in stereo through (I believe) Sunn amps. So, you've got the bridge pickup trebly and nicely distorted, and the neck pickup running fat and warm.
I've actually got an Alembic savings fund going on - at my current rate, I should be able to order one when I'm 50.