Mikko used his B7K and I used my PSA-1 for the grit portion of the bass tone. The DI was run through Bass Rider and a Distressor to level it out before mix processing. Once in the mix the DI was filtered down quite heavily, and the grit tracks were filtered up. I used my hardware 1176 Rev D for the bulk of the compression, an L1 shaving maybe 1 to 2dB from the tops and about 2 or 3 instances of EQ to do the tone shaping. It also had the VCC Brit N channel running on it to give more sub-emphasis and open the tone up.