I have a Klipsch Ultra 5.1. Great system. Recently it started hissing with or without an audio source, with or without filtered power (using a monsster system). But when I move the system elsewhere, there is no hiss. Its driving me crazy. I moved the speakers, tried with and without an audio source. Connected just two speakers, removed the ground wire from the plug. I can't figure it out. Any help would be apprecaite. Right now they hiss and aren't even connected to the PC input or any other input. When I moved the set up to the kitchen about 20 feet away, the speakers are silent and work great when hooked up to my laptop.
