CES 2011

Greensound Technology unveiled a line of three speakers and a subwoofer made of glass. The speakers are said to produce sound from 70 Hz to around 17 kHz. Round holes strategically cut into the glass cause the upper frequencies to be emitted by the upper portion of the glass panel with the lower frequencies emanating from the lower region. Pricing ranges from $4,000 to $19,000/pair.