The Natural Speaker by Joon & Jung (same duo who designed the paper alarm clock):

The idea for the ‘the natural speaker’ derived from the desire to create an absolutely unique, handcrafted speaker for the interior space. Whereas a lot of speakers are constructed to produce a rather fat bass and sharp high tones, we felt the sound was kind of stuck inside the speakers, missing a natural vibe and ambiance. During the development of the ‘the natural speaker’ we discovered the great properties of porcelain as a speaker casing, providing a clear resonance and mellow sound.