Haha, erm... Boss HM-2 with the bass on 2 o'clock and the treb on 10 o'clock, distortion all the way up. Into the VOX AC15VT on the 'bassman' pre-set setting.
It's a very old school metal, fizzy distortion. So 80's metal i think i've just had a trip in a delorian.
Hopefully soon i'll be building my own bassman, which should sound awesome :)
I can also turn the distortion on the pedal right down, and turn the gain up on the amp a bit and get a nice blues lead sound...