Need some help with this guitar tone (Metal, lots o solos)

[jherman]

http://dl.dropbox.com/u/10066138/Mp3s/Teaser2.mp3

signal chain:

Duncan clone > Ts9 > 5150 block Letter > Mesa Os 4x12 > "Fredman" 57's.

I've tried all kinds of cuts, even the almighty sneap C4 setting and cannot get the "tubbiness" out of these guitars, suggestions?