I'm still working on these fuckers. I think I may have blown what's known as the B fuse in the mono blocks and now need to replace. Manley has told me it could very well be a bad tube, but I need to do this first. I just finished opening up the bottom of one of the snappers - i was a little hesitant to say the least b/c of the high voltage in these things. The point to point hand wiring is absolutely sick in these things. I should be able to swap fuses over the weekend and see if I can't get them back up and running.