I have a PSW303 Powered Subwoofer. It is 3 years old. No problems until today. When we are watching television, everytime you change the channel there is a popping sound. When it is a surround sound station you get a pop when you change the channel and another pop when it picks up the signal for the sub. Using a LFE cable to connect the sub from the receiver to the sub. Connections have been checked.
There was a heater plugged into the same outlet as the sub. The problem started after my wife turned the heater on today.
It works fine after the initial pop......