I printed these as a gift for my father. He’s not an audiophile, but he does appreciate good music and certainly understands what makes speakers sound good. These were printed in halves, solvent-welded together, smoothed with autobody filler & sandpaper, then painted with gloss black spraypaint.
Hardware parts list (everything was from Parts Express):
The frequency response was surprisingly wide. The nautilus shape is hollow all the way back, and creates a relatively large enclosure for the speakers. I haven’t measured it, but I wouldn’t be surprised to know these 3″ drivers were reproducing down to 100hz.