I came across this video of an Azola Ultracoustic Baby Bass, played by Roby Perissin. The sound is somewhat “crunchy” but the sound of these babies is really cool (the Azola had a hollow body, which sure contributes to the deepness). Enjoy the video!
Update: Roby commented here, I’d recommend to check the less crunchier sounding songs on his myspace. Or hisspace, if you like. 😀