Need Help with Popping Noise from Speaker

I'm hoping someone can help. My HD sateillite receiver is connected to my Home theater preamp. When I watch a HD channel and switch channels I get a pop noise emitted from the speakers. It seems to happen only when changing channels from a HD station to another station. Any ideas what could be causing this to happen?
poor design or bad/leaky coupling capacitor
whenever you get switching pops that's an indication of DC potential where it doesn't belong
It sounds like the receiver is popping everytime it locks on to the dolby digital signal when you change stations. Try only hooking up the analog cables or switching the input mode to analog and see if it still happens.
Thanks for the response I'll try that but then what's the fix? I kfigured its a digital not analog problem. Also it only emits from the left speaker.