You’ve seen a few reviews of vibration type speakers here on The Gadgeteer and the jury is still out as far as just how good they sound. I have another one for you to consider. It’s the Rock-it Portable Vibration Speaker from Pyramid Distribution. The idea is that you stick this device on any surface and it turns that surface into a speaker by using vibration. Sound quality is determined by the surfaced that you use. The Rock-it is powered by 2 AAA batteries and is available now for $29.99
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I for one am not interested in any of these vibration speakers until they develop a unit that delivers stereo channels for a convincing sound field…