I just saw that Dwarfcraft, WI resident and maker of tasty effect pedals, is doing a new tube amp. Its only 50 watts but he does demo a bass in the vid and it sounds good.
BTW, I'm not affiliated with them other than playing around with a couple of his pedals and enjoying his demos. Oh, I like supporting local businesses too.
If you want to skip the guitar and baritone demo go to about 7:30 or so.
http://www.youtube.com/watch?v=Pyj2wqSbWF0