Can speaker cable pick up EMI / RFI and cause the speaker to start buzzing? My center channel tweeter started buzzing (not hum) a few days ago so I rearranged the cables at the back of my AV rack, mainly keeping more distance between IC cables and power cords. It didn't help. Next day, I turned the system on and no buzz so I watched a movie without a problem. Today, turned it on, the buzz came back. :angry-cussingblack: I started to turn off components one by one until everything is turned off including equalizer, active x-over except for the amp feeding the center channel tweeter. The buzz remains. It seems as if the source of this buzz is between amp and speaker driver. Any suggestions?