Hey gang. I came across this forum and am glad I did. I need some advice. I have a older Velodyne subwoofer (model CT 80). I bought it as an open box item from Circuit City about 5-6 years ago. Its in good condition and works fine except for the fact that it has always given a lasting low frequency thud until it receives a signal from the receiver. (My receiver is a Sony STR DE 825) If I haven't made myself clear here's an example of what I mean: I have my subwoofer power cord plugged into the back of my receiver. When I turn my receiver on (either radio tuner or tv audio) there are a few seconds in which there is no audio (this also happens when switching between audio sources). But while the subwoofer is waiting those few seconds to receive an audio signal from the receiver, it gives a low frequency thud that is REALLY annoying until the tuner or tv audio kicks in. This happens whether I have the sub power cord plugged into the back of the receiver or not. I think its a problem with the subwoofer that I can't fix myself. Is anyone familiar with this type of issue? Can anything be done? I've had people tell me it may be a grounding issue with the power cord, but their suggestion of putting an extension on it has not worked.