HELP!! Martin Logan's clicking when off?

My Martin Logan Aerius', manufactured in 1992, have started to make a wierd sound. Background info: Biwired (two sets of speaker inputs per speaker), each speaker has its own built in amplifier, and I have just purchased a good (for Harmon Kardon) amplifier/receiver a month earlier, and since there is only one set of speaker out connections, I joined both wires together and connected them to the Harmon Kardon. The problem is that the speakers, for no obvious reason, and with no obvious sound or sets of sounds to set them off, make a medium pitched clicking sound, at a rate of one click per second. I have tried a different CD player, etc to no avail, and I have also switched the left and right channels with no effect, so it has to be coming from the speakers, or built in speaker amplifier. When I unplug the power connection to the speakers, the clicking sound still stays, and even continues to click when I turn off my receiver!, and furthermore, the clicking sound continues even when there is no power to either the speaker or the receiver??? What is going on? I fear the worst, and see a large outlay of money to replace the electrostatic panel, however, if the panel is "broken", would it still produce any sound. The speakers still sound okay, except for the clicking sound. Help, Terence Dittman terry@prymed.com