I've been on the lookout for a decent deal on a used Weber MicroMASS attenuator on eBay for awhile now. They don't come up very often, and seem to go for almost the retail price when they do, so I may have to break down and just buy one from Weber.

Even at 5W, to get that really nice tube saturation sound, the VJr is too loud in the small room where I generally play. From what I read, these little Weber attenuators work great and introduce very little tonal coloration of their own. At $70, the MicroMASS is very reasonably priced for a high quality speaker motor-type attenuator. And I can use it with my Blues Junior or Firefly, too, if I want to.