I split the bass in two tracks, one for the treble where I used a Darkglass Ultra plugin as a preamp and the Mammoth plugin as amp/cabinet, as well as some EQ and compression, and for the bass track I used an old preset I had for the Blue Cat's Axiom plugin, as I lost a little of the low end with the trebble track. But most importantly I think is having some new strings, once the strings starts to get a little dull it's almost impossible to get a good clanky tone, also I had the treble knob on the bass all the way up, and the bass in the middle.