One of my musician buddies wants to put together a folk music group to play at local events. He asked me about playing bass and if I had any ideas. Obviously, DB would be ideal, but I don't have one. Other instruments would be banjo, guitar, washboard, plus who knows what folk type instruments, and I think that all of us would be singing. I'm also thinking that we would be playing outdoors most of the time. My first thought was washtub bass, but then I remembered the whole cardboard box bass thing, which is something I've wanted to build for a while anyway, so I think I'm leaning that way. I've done a bit of research and can't really get a good idea of how loud the box basses are unplugged. I think they sound really cool plugged in (piezo pickup), and I guess it wouldn't be the end of the world if I had to use a small battery powered amp (maybe even built in to the box), but I would like to keep it acoustic if possible just to keep with the whole vibe of the group. I'd appreciate comments from any washtub or box bass players.