After listening to some music I turned of my receiver and noticed my tweeter (LF) is buzzing. Its a very minute sound similar to a fly flapping its wings. So I turned my receiver on/off to see if the BUZZ goes away and to no avail it is still there. I then unplugged the receiver cord from the power strip and it is still buzzing. I figured the source might be coming from the receiver itself, but when I took off the speaker wires from the speaker it is still buzzing... Right now the speaker has been buzzing for more than 10 minutes with no signal and nothing connected to the speaker. BTW I have Klipsch RF-3s up front and my receiver is connected directly to a power strip.