With the Onde and the Pyramid, designed by La Voix du Luthier, the sound directly comes from the vibrations of the 2 soundboards carefully crafted by a master luthier (stringed instrument maker). There is no speaker cone inside, only acoustic exciters transmitting the vibration into the wood. It is the same principle as for a guitar: the strings themselves make very little sound, but they are transmitting their vibrations to the soundboard through the bridge, and what you hear is the sonic amplification via the soundboard. They are designed to give an immersive acoustic sound to any electronic instrument, but can also be used receiving via Bluetooth from any electronic device (smartphone, computer, etc.).
