No matter where I plug my speakers in (KRK V6 II), there's always a little "shhhhh+very low crackle" going on when I place my ears close to the tweeter. Not loud enough to get too much in the way of mixing when I'm sitting 4 feet back but still, I know it's there and when the music stops for a while, I somehow can hear it and it's starting to piss me off. I've read about plugging all gear to the same outlet/breaker, which is what I'm doing [they're plugged into a rackmounted Furman RP-8], I have no dimmer switches and all my audio and power cables are relatively well spaced and tidy (no angled crossings between them). Could it be that power in my building is just shady and there's not much that can be done on that end? Perhaps a different type of power strip could help? Some kind of power conditioning strip - anything you recommend for this type of situation? Thanks for any help.