Have you used that Channel Islands product? How did you configure it in your system? I've had transformer hum no matter what conditioner I've used.Yes, I have used it. I plugged it into the wall, and I plugged my amp into the XDC-2. No other AC products on the line.
Johnmcalpin (System | Threads | Answers)
Transformer hum was reduced by about 2/3.