Who knows; the perfect speaker could be created from a roll of loo-paper and a few components - but if it doesn't look good, it'll hardly do well. Apparently porcelain and wooden dowel has been discovered as the perfect mix.
Thankfully both form and function seems to have played equally crucial roles in Joon and Jung's design, as they claim the porcelain used for the speaker casing actually increases sound quality, making the audio more mellow and with clearer resonance. I don't know about any of that, but the handcrafted speakers do look very DIY. [JoonJung via Freshome via OhGizmo]