I'm just starting to learn and I have a Line 6 Spider IV Amp. It pops whenever the AC turns on, or if I open the Microwave. Even flipping a light switch will make it pop to a lesser degree. I'm in an apartment so I apparently get this from things happening in other units as well since it can just be sitting on and it will lightly pop once in a while. This doesn't seem that it should be normal to me. Does anybody have any suggestions?