Thanks for your responses, guys. The line is a brand new, dedicated copper line with a hospital grade receptacle. Unfortunately, I was not here when electrician checked the line, so I don't know if my wife had them check it "under load", so to speak. There are three amps (B&K, Threshold T200 and Genesis) + a TV on that line, but that's it. Weird that the other components don't seem to be affected - the B&K is either very sensitive to voltage anomolies, or is defective. In any event, I will be sending it to B&K after the holidays (I've got 5 inlaws coming to town and need the home-theater diversion, believe me!)to be checked and repaired.
Jim
Jim