Well I have lowered my receivers level to -10 and if turn up the volume I do not get the bass I want or expected. So I turn it up some and itt sounds great through most of the movie but when there is a strong boom all of a sudden in a scene that is when it pops. I have a Sony STRDE997 receiver and my old sub was a JBl PSW-1200 and it never did this. I connected my old JBL and I can turn it up and it never pops. Could there be something wrong with the reciever or the new sub??