The open-cage printer will work using "fused filament fabrication" with 1.75mm filament, and will also feature 100 micron layer resolution (0.1 millimeter), rigid aluminum construction, an open-source software tool chain and optional heated build platform.
So provided that your speakers have their own power source, it's just a matter of charging these aluminum dongles up (a single charge lasts up to 10 hours), plugging them in and then pairing the right receiver with your audio source.