I loaded it with my true & tried JJ E34Ls. Used to have 6550 tung-sols, but I didn't like them much. Preamp tubes I don't know, they sounded good so I've never checked. Probably stock Chinese.
I played the Einstein rig the whole night today, finally got to bring my Horizon with Nailbombs to the rehearsal space & it totally smoked. Horizon-Nailbomb-Diezel-EVM12L combo is just insane. I play with a freaking 1x12 & I don't think I'll need a bigger cabinet ever. I'm against a half stack & I'm still the loudest one in the band.
I just hope I'll get out of this isocab situation at some point finally & then the real good clips will follow.