I subbed on a gig last night for my teacher, and used a PJB 2x5 Breifcase. I had used it in rehearsal once before for the same gig (the musical Working), as well. This thing is very, very loud for it's size. I could keep up with a drummer, so long as he wasn't playing too hard. I had the volume around 3 o'clock the whole show, adjusting from my bass. It's really cool to see the speakers jump- and they really jump. The sound was pretty good, some slight farting on the low B but what can you expect? Overall, I really liked this thing. If they could be had for $300-$400, I'd take one (does anyone know how much they are?).