Yeah,
I called Klipsch tech support. He had me plug in my other speakers to my headphone jack (I don't have headphones), and they worked fine. He said that means the amp in the speakers is bad.
I called dell, and they're shipping out new ones right away, then I'll send these back (no charge). They were VERY good. My rep lives in India. Yeah, speakers made in china. Consumer (me) lives in america.
Funny that they worked for 3 hours. That isn't typical for electronic devices. Perhaps just a bad chip, or bad internal connection that heated up I suppose. Better now than after the warranty expires. Klipsch would've fixed them too, but dell is much faster.
-Nimbus