UCube speakers run off USB, are coming to an Amtrak quiet car near you

You can use these USB-powered UltraLink UCube speakers on a bus, on the beach, or on the table at your favorite McDonald's, but please -- for the love of god -- don't. Remember: with great convenience comes great responsibility, and if these speakers are as impressive as the dramatic marketing video below implies, disruption of the peace is about to know no bounds. At $150 per pair, these sleek sound machines aren't cheap, but each speaker is able to pump out 15 watts of peak power -- you won't be filling a large room with crisp, distortion-free sound, but they're probably loud enough to play your tunes or flicks for a group of friends, or to annoy strangers in a park. UltraLink claims that the speakers use DSP-controlled power supplies to "store energy during quiet passages," allowing the 3.25 inch cubes to reach their 15 watt peak output with 170-degree listening angles. We haven't had a chance to go hands on, but if these speakers sound half as good as they look, we may have a better solution for playing music in the CES trailer next year.