All speaker systems need a housing of some sort. Normally we see boring wood boxes with some holes cut in them so that round speakers could be mounted into them. There are a few companies who make some speakers which are not just boxes with holes such as the Bazooka Tube Subwoofers. Instructable user djairjr had an old vacuum cleaner which had reached the end of its life. After cleaning out some of the guts he was able to fit a woofer into it, now he has a very unique DIY Vacuum Cleaner Subwoofer.
