http://www.s3isound.com/
http://www.soliddrive.com/

Turning solid surfaces into speakers
Induction Dynamics™ SolidDrive™ is a powerful sound transducer that transmits acoustical energy through almost any solid surface. The entire surface becomes a speaker delivering high-quality sound and the frequency response of conventional diaphragm speakers. SolidDrive™ provides a distinct advance for audio systems used in home theater systems, distributed audio, and other high-performance audio applications. SolidDrive™ works with rigid surfaces that include glass, drywall, granite, metal, wood, ceramics, laminates and composites. Because the SolidDrive™ utilizes materials already existing in a room, it’s ideal for installed home audio, commercial audio, or a home theater sound system.

How does the Induction Dynamics. SolidDrive™ work?
SolidDrive™ is a patent-pending technology that utilizes very high-powered neodymium magnets and dual symmetrically opposed motors to convert audio signals into powerful vibrations that are transferred into solid surfaces by direct contact. High-quality, full-range sound is then radiated from the entire surface-with a frequency response of 70 Hz to 15 kHz.

Deliver sound to any room with no visible speakers or wiring
Induction Dynamics™ SolidDrive™ installs directly behind walls for a truly inside-wall speaker – turning the entire wall into a sound source. Sound is generated from these large acoustic-radiating surfaces and the listener becomes immersed in sound. The sound is omni directional at nearly all frequencies while channel separation is maintained.