This is an old school amp from Jack's first days as a tube headamp builder. It's basically a commercialised van Waarde amp. It is a White Cathode Follower design employing a single 6922/6DJ8 tube for the input stage and a single 6AS7/6080 for the output. The sound is clean and powerful. It's in the same league as the Darkvoice 336. I have to sell this because I'm accumulating way too many amps at home. This is a great starter tube amp for the emerging tube lover. You can read more reviews HERE and HERE. Pictures of mine: You can see more pictures of other versions on Woo Audio's website. The tubes included in the package are one Sovtek 6922 (not pictured) and one RCA 6AS7GA tube. I would like SOLD (CONUS, Paypal) shipped for this amp. My feedback is here.