UpBeat Audio has announced the Boostaroo Revolution, a new 6-ounce amplifier compatible with iPods and other personal audio players that it says provide 3D surround sound capabilities and a quadruple boost in volume. It costs US$79.95. It’s available now from the Web site and is coming later this month to retailers, and comes in black, white and silver finishes. The pocket-sized amplifier works with any device equipped with a headphone jack, and touts a “decompression enhancer circuit” that the manufacturer says provides a fuller-richer sound for MP3 audio. The Boostaroo Revolution has two standard mini outputs on it, so two listeners can listen to the same audio. The pint-sized amp works on two AAAA batteries, included, which last for about 24 hours of constant use.