sansamp psa-1

i read a article where the rza uses this to get his dirty drum sounds. its a guitar amp or some shit.

You can get a plug in version, it's really sweet, it's basically a distortion effect, but yeah, it's an amp emulator.
I use to use it all the time until Amplitube came out, a far superior Amp modeller. You should check it out.

http://www.amplitube.com/

the adrenalinn is a better amp modeler and has beat synced effects and filters.