Oh the horror of those things languishing in the deep recesses of the storage spaces in my apartment. The truth is, I nearly killed my sewing machine putting this little beauty together, and am loathe for a repeat performance.
What you're looking at the top is a four foot by five foot flannel quilt, embedded with twenty 2-inch speakers. Those little puffs are constructed with box pleats, spacious enough for some poly fil and a maybe a speaker.

Haven't you ever wanted to wrap yourself in a song?