speakers are buzzing

[cr_buck]

I have installed mynew amr50 speakers and they worked great for about 2 hrs but now they are making an overwhelming buzzing noise

[mantis]

describe the noise in more detail.Does this happen with the lights on or off, with the satellite dish onor off(if you have one.) there maybe a poor ground but need more Info first.

[cr_buck]

Thanks for the reply Mantis. The sound is a hum that has bass to it. If I turn the subwoofer down it plays music but in the background there's a distinctive humming sound. With the subwoofer on you can't even hear the music, the hum is so loud. I had it plugged into a strip at the pc and ran an ext. cord but its still making the noise. Do you think it might be a warranty problem?