After 18 months of fighting a hum, I called in an Audio Sound Room electrical engineer to evaluate my whole electrical grid and components. We spent 4 hours together going over every cable and cord that have and even exchanged DAC's to try and identify the problem. The only thing that cured the hum is when we used a cheater plug. After talking to fellow audiophiles on WBF, a person suggested I try EbTech Hum X. For $80 I said what the hell. I plugged it into my more prominent hum amp and the hum was 99.5% gone. I ordered another one and sued it for the other amp. Dead silence. So, for roughly $160 I cured my hum problem that I have been fighting for over a year.
