I have always wanted to be able to find a good option for a portable, battery operated bass amp. Do I have rediculous, unrealistic expectations? No. However it seems that the Crate Taxi for bass is the best option. Really? I've seen so few try this concept and none have really outdone themselves. I've tried the PJ Briefcase, but the thing was so quiet and thin compared to the Taxi that it was no competition. I have a RX cube but I want something that can keep up with any combination of two guitars (clean and acoustic), two ukes, or a trumpet, 'bone, and maybe a snare/hihat combo on a street corner venue. Isn't there anything new? I've thought about using a Shuttle 3.0 8t with the additional 8" ext cab but how would I power it? That would be my preferred method but don't know how to go about doing it. Is there a suggested portable power suply of some sort?!