I remember when I was in high school, my friend and I made a bunch of subwoofer enclosures using some wood and acrylic. Well, I guess you don’t have to always make subwoofer enclosures from scratch but re-use old gadgets like a vacuum cleaner as one, and this is exactly what the author of this DIY Vacuum Subwoofer did with step-by-step instructions showing you how to do it too. via hackedgadgets, Project Page