Here at the Aebersold camps and this year the rental bass amps are all the new Fender Rumble series combos both the Rumble 40 and Rumble 100 combos. I have to say that so far, plugging straight in with a Full Circle-equipped DB, the sound coming out of these things is really, really good set flat. Plus, they are really cheap and *ridiculously* light. I can easily pickup either by the handle with my pinky. If you're in the market for a small, light, cheap amp, these definitely deserve a look.