I am inclined to agree with you about emf. I highly doubt it needs a new driver if the woofer stops buzzing when 1 1/2 feet away from the tv and the receiver is on or off. Even if I don't have the receiver on, the buzzing still happens. That's I say it's weird. However, it is only effecting the left woofer. Maybe a new driver is in order. I will take it apart and check for loose connections.