to Neal I have heard the pops thru the subwoofers line level inputs and thru the speaker level inputs although its less frequent with the speaker level inputs which is my current hook up. In my case I get better bass and am able to adjust the bass and maintain it at my prefered listening level at the subwoofer when using the speaker level inputs. I still get the occasional pop, most recently when playing the Mechassult XBOX video game. I have heard the popping with the movie Independence Day and Star Wars episode 11. When I use the line level input I had to lower the volume at the sub to avoid an increase in the popping sound. I've been away for 10 days and have not been playing any movies but I will start experimenting again. Thanks for the suggestion and any other ideas are most welcome.