Jim -

I built that one to try out an idea about making the tub actually "resonate." I may have commented previously that there's a masonite "plate" between the two tubs, with a small (1.12?) hole in the plate, so that you have two essentially closed air volumes loosely coupled through the hole. The air in each tube has a "resonant frequency" that's pretty distinct. Since the two tubs have frequencies about a fifth apart, loosely coupled, you get a fairly flat response over about an octave and a half.

Over the resonant response range, you get a pretty good tonal simulation of a standard "stand up" bass - at least before a few parts started to loosen up from standing in the rain for 14 years.

Broken down for transport, the smaller tub nests in the bigger one, so it's not much bigger to haul around than a single tub. Since the "anticipated use" was the Winfield street jams - as in the photo - the wheels seemed like a good idea. The other guy copied that from mine. He's been coming around looking for about 3 years, but claimed he "invented and built" his while waiting in line to get his camping spot at the festival this year.

The two guys on the jugs in the photo were both mostly playing "slap bass" style. They were both pretty good. Had a lot of fun having the old jug wrung out for about an hour.

John