ClearView Audio's invisible speaker
Obviously, a speaker with no wire and no cable is pretty much been-there, done-that. So, ClearView Audio of Waltham, Mass., came up with an invisible speaker. Using a transducer made from thin, slightly curved, and optically clear acrylic glass, the new speaker, called "ClearView Clio" lives up to the company's marketing pitch: "No more black boxes" in the living room.
The invisible speaker features "Edge Motion" technology to generate sound, a mechanical principle very different from traditional cone speakers, according to the company. Edge Motion deploys piezo-electric actuators that vibrate the sides of a clear acrylic glass transducer to generate a piston-like motion, thus creating sound waves with equal radiation forward and backwards.
In a nutshell, the invisible "dipole speaker" works by creating air movement directly from the front and back surfaces of the driver, rather than by impedance, matching one or both outputs to the air.
Guts of the invisible speaker.