Two 12ax7 preamp tubes, Four 6550 power tubes. Works great, has a great Trace Elliot pre-amp (by-passable) built in. Will try to post pics later. $700 local, $750 shipped. I'd prefer to sell outright, but may consider a trade for the right 1) Camera gear (preferably something in the Canon EOS line), 2) Electric violin or E-Double Bass, 3) a Dave Smith Prophet, Tetra, etc., or 4) maybe a GOOD bass--MIA Fender or a Fender Geddy Lee or MM, another Music Man, or something fancier. MODS! ...since my membership lapsed for a while, I couldn't update my very old post with the new price. So, if you have to delete one post, please delete the old one. Thanks!