I had the same trouble with almost every pre-pro I used. The only one I've found that I've used that doesn't pop is my Lexicon MC-12,or MC-8 What they do is Mute the outputs till the Pre-Amp has a chance to lock on to the Dig. Signal. The end result is I never get any more Tweeter burning pops!! What I did find to work on my B&K was to use the mute before changing chanels on my cable box,kind of a Pain but effective.