Seeing that you don't seem to be too familiar with audio stuff in general, I think the best course of action to go about resolving your speaker popping issue is to pay an actual physical visit to the RS AV sponsor --
SoundsGood Auto Services -- and get Mike from Sounds Good to figure it out. What you have to do in this case is, figure out a budget that you are comfortable with spending, ask for and listen to several different options that Mike lays out for you, and just pick one that you are most comfortable with.