DIY cheap-fancy speakers

Swan HiVi 3 inch "full range" speaker drivers (somewhat fancy), housed in the most budget enclosure. Consider using them in stand-alone digital musical instruments, although their weight was surprising. Also sounded quite anemic with a small 5W amp... may need something beefier, which drives up the power budget for portable applications. Right now we're testing these alongside the Pyle 4" cubes, which are amazing little boxes for their price. I suspect a better enclosure, and a low frequency cut-off will make these Swans sound even better...