This may be a repeat, so forgive: I have a 1999 Ampeg SVT Classic AV head w/ KT88s. I use the Classic 810 cab. I'm currently using a Line 6 Bass Pod XT Live, using the SVT setting, called "Classic Rock." I edit the settings according to the room. I bypass the preamp on the Classic (which is way too dirty and toneless IMHO) and go straight into the power tubes. You can cop ANY Ampeg sound recorded or live you've ever heard with the Line 6. Line 6 makes GREAT stuff, but you need to be patient and tweak things. You can also get the tone you want at any volume this way. Massive rich bass tone to die for. The first time I gigged this setup, I pooped my pants!!! Anyone else using Line 6 with a tube amp?