Hi All I'm fairly new to all this and have just added the Cambridge Audio Azur 540R receiver to my setup. It works as it should and is decoding everything correctly, however every time I change channel on Sky+ or change input from DVD to Video 1 / Video 2 etc etc on the receiver I get a popping noise from the speakers. It's not a majorly loud noise or something that I would worry about long term but I wondered whether this was the norm with AV receivers? Incidentally, this is an upgrade from an all in one Sony Home Cinema jobbie which didn't seem to have this problem. Any ideas?