Clipping sound from stereo

Just wondering if anyone else gets a clipping sound from their stereo.

It seems to be a momentary loss of power to the stereo and during that time a loud "thump" comes from the speakers.

Has anyone else experienced this before?

Andrew

There is one station on my radio where there sounds like a ticking/clicking in the speakers, but I don't get it on other stations.  I think it has to do with the style of the antenna, but since I don't get it on other stations, I'm just going to leave it.