When you're trying to diagnose the source of buzz, pop, and cycle based sounds

[TridenT]

And then you go to one side of the speaker to check it up close... and then you move away and it comes back... and then you're like, "Wait, is one of my ears just bad?"

And then you're saying, "I am made of water... Am I that good of an insulator from interference? This isn't ground loop based, apparently. But... what could it be?"

Wireless router was causing interference. It was on the left side of one my speakers and causing a racket at times. Moved it a foot further away. Noise gone.